[project/drupal.git] / modules / field / tests / field.test

<?php

/**
 * @file
 * Tests for field.module.
 */

/**
 * Parent class for Field API tests.
 */
class FieldTestCase extends DrupalWebTestCase {
  var $default_storage = 'field_sql_storage';

  /**
   * Set the default field storage backend for fields created during tests.
   */
  function setUp() {
    // Since this is a base class for many test cases, support the same
    // flexibility that DrupalWebTestCase::setUp() has for the modules to be
    // passed in as either an array or a variable number of string arguments.
    $modules = func_get_args();
    if (isset($modules[0]) && is_array($modules[0])) {
      $modules = $modules[0];
    }
    parent::setUp($modules);
    // Set default storage backend.
    variable_set('field_storage_default', $this->default_storage);
  }

  /**
   * Generate random values for a field_test field.
   *
   * @param $cardinality
   *   Number of values to generate.
   * @return
   *  An array of random values, in the format expected for field values.
   */
  function _generateTestFieldValues($cardinality) {
    $values = array();
    for ($i = 0; $i < $cardinality; $i++) {
      // field_test fields treat 0 as 'empty value'.
      $values[$i]['value'] = mt_rand(1, 127);
    }
    return $values;
  }

  /**
   * Assert that a field has the expected values in an entity.
   *
   * This function only checks a single column in the field values.
   *
   * @param $entity
   *   The entity to test.
   * @param $field_name
   *   The name of the field to test
   * @param $langcode
   *   The language code for the values.
   * @param $expected_values
   *   The array of expected values.
   * @param $column
   *   (Optional) the name of the column to check.
   */
  function assertFieldValues($entity, $field_name, $langcode, $expected_values, $column = 'value') {
    $e = clone $entity;
    field_attach_load('test_entity', array($e->ftid => $e));
    $values = isset($e->{$field_name}[$langcode]) ? $e->{$field_name}[$langcode] : array();
    $this->assertEqual(count($values), count($expected_values), t('Expected number of values were saved.'));
    foreach ($expected_values as $key => $value) {
      $this->assertEqual($values[$key][$column], $value, t('Value @value was saved correctly.', array('@value' => $value)));
    }
  }
}

class FieldAttachTestCase extends FieldTestCase {
  function setUp() {
    // Since this is a base class for many test cases, support the same
    // flexibility that DrupalWebTestCase::setUp() has for the modules to be
    // passed in as either an array or a variable number of string arguments.
    $modules = func_get_args();
    if (isset($modules[0]) && is_array($modules[0])) {
      $modules = $modules[0];
    }
    if (!in_array('field_test', $modules)) {
      $modules[] = 'field_test';
    }
    parent::setUp($modules);

    $this->field_name = drupal_strtolower($this->randomName() . '_field_name');
    $this->field = array('field_name' => $this->field_name, 'type' => 'test_field', 'cardinality' => 4);
    $this->field = field_create_field($this->field);
    $this->field_id = $this->field['id'];
    $this->instance = array(
      'field_name' => $this->field_name,
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'label' => $this->randomName() . '_label',
      'description' => $this->randomName() . '_description',
      'weight' => mt_rand(0, 127),
      'settings' => array(
        'test_instance_setting' => $this->randomName(),
      ),
      'widget' => array(
        'type' => 'test_field_widget',
        'label' => 'Test Field',
        'settings' => array(
          'test_widget_setting' => $this->randomName(),
        )
      )
    );
    field_create_instance($this->instance);
  }
}

/**
 * Unit test class for storage-related field_attach_* functions.
 *
 * All field_attach_* test work with all field_storage plugins and
 * all hook_field_attach_pre_{load,insert,update}() hooks.
 */
class FieldAttachStorageTestCase extends FieldAttachTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field attach tests (storage-related)',
      'description' => 'Test storage-related Field Attach API functions.',
      'group' => 'Field API',
    );
  }

  /**
   * Check field values insert, update and load.
   *
   * Works independently of the underlying field storage backend. Inserts or
   * updates random field data and then loads and verifies the data.
   */
  function testFieldAttachSaveLoad() {
    // Configure the instance so that we test hook_field_load() (see
    // field_test_field_load() in field_test.module).
    $this->instance['settings']['test_hook_field_load'] = TRUE;
    field_update_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    $entity_type = 'test_entity';
    $values = array();

    // TODO : test empty values filtering and "compression" (store consecutive deltas).

    // Preparation: create three revisions and store them in $revision array.
    for ($revision_id = 0; $revision_id < 3; $revision_id++) {
      $revision[$revision_id] = field_test_create_stub_entity(0, $revision_id, $this->instance['bundle']);
      // Note: we try to insert one extra value.
      $values[$revision_id] = $this->_generateTestFieldValues($this->field['cardinality'] + 1);
      $current_revision = $revision_id;
      // If this is the first revision do an insert.
      if (!$revision_id) {
        $revision[$revision_id]->{$this->field_name}[$langcode] = $values[$revision_id];
        field_attach_insert($entity_type, $revision[$revision_id]);
      }
      else {
        // Otherwise do an update.
        $revision[$revision_id]->{$this->field_name}[$langcode] = $values[$revision_id];
        field_attach_update($entity_type, $revision[$revision_id]);
      }
    }

    // Confirm current revision loads the correct data.
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    field_attach_load($entity_type, array(0 => $entity));
    // Number of values per field loaded equals the field cardinality.
    $this->assertEqual(count($entity->{$this->field_name}[$langcode]), $this->field['cardinality'], t('Current revision: expected number of values'));
    for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
      // The field value loaded matches the one inserted or updated.
      $this->assertEqual($entity->{$this->field_name}[$langcode][$delta]['value'] , $values[$current_revision][$delta]['value'], t('Current revision: expected value %delta was found.', array('%delta' => $delta)));
      // The value added in hook_field_load() is found.
      $this->assertEqual($entity->{$this->field_name}[$langcode][$delta]['additional_key'], 'additional_value', t('Current revision: extra information for value %delta was found', array('%delta' => $delta)));
    }

    // Confirm each revision loads the correct data.
    foreach (array_keys($revision) as $revision_id) {
      $entity = field_test_create_stub_entity(0, $revision_id, $this->instance['bundle']);
      field_attach_load_revision($entity_type, array(0 => $entity));
      // Number of values per field loaded equals the field cardinality.
      $this->assertEqual(count($entity->{$this->field_name}[$langcode]), $this->field['cardinality'], t('Revision %revision_id: expected number of values.', array('%revision_id' => $revision_id)));
      for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
        // The field value loaded matches the one inserted or updated.
        $this->assertEqual($entity->{$this->field_name}[$langcode][$delta]['value'], $values[$revision_id][$delta]['value'], t('Revision %revision_id: expected value %delta was found.', array('%revision_id' => $revision_id, '%delta' => $delta)));
        // The value added in hook_field_load() is found.
        $this->assertEqual($entity->{$this->field_name}[$langcode][$delta]['additional_key'], 'additional_value', t('Revision %revision_id: extra information for value %delta was found', array('%revision_id' => $revision_id, '%delta' => $delta)));
      }
    }
  }

  /**
   * Test the 'multiple' load feature.
   */
  function testFieldAttachLoadMultiple() {
    $entity_type = 'test_entity';
    $langcode = LANGUAGE_NONE;

    // Define 2 bundles.
    $bundles = array(
      1 => 'test_bundle_1',
      2 => 'test_bundle_2',
    );
    field_test_create_bundle($bundles[1]);
    field_test_create_bundle($bundles[2]);
    // Define 3 fields:
    // - field_1 is in bundle_1 and bundle_2,
    // - field_2 is in bundle_1,
    // - field_3 is in bundle_2.
    $field_bundles_map = array(
      1 => array(1, 2),
      2 => array(1),
      3 => array(2),
    );
    for ($i = 1; $i <= 3; $i++) {
      $field_names[$i] = 'field_' . $i;
      $field = array('field_name' => $field_names[$i], 'type' => 'test_field');
      $field = field_create_field($field);
      $field_ids[$i] = $field['id'];
      foreach ($field_bundles_map[$i] as $bundle) {
        $instance = array(
          'field_name' => $field_names[$i],
          'entity_type' => 'test_entity',
          'bundle' => $bundles[$bundle],
          'settings' => array(
            // Configure the instance so that we test hook_field_load()
            // (see field_test_field_load() in field_test.module).
            'test_hook_field_load' => TRUE,
          ),
        );
        field_create_instance($instance);
      }
    }

    // Create one test entity per bundle, with random values.
    foreach ($bundles as $index => $bundle) {
      $entities[$index] = field_test_create_stub_entity($index, $index, $bundle);
      $entity = clone($entities[$index]);
      $instances = field_info_instances('test_entity', $bundle);
      foreach ($instances as $field_name => $instance) {
        $values[$index][$field_name] = mt_rand(1, 127);
        $entity->$field_name = array($langcode => array(array('value' => $values[$index][$field_name])));
      }
      field_attach_insert($entity_type, $entity);
    }

    // Check that a single load correctly loads field values for both entities.
    field_attach_load($entity_type, $entities);
    foreach ($entities as $index => $entity) {
      $instances = field_info_instances($entity_type, $bundles[$index]);
      foreach ($instances as $field_name => $instance) {
        // The field value loaded matches the one inserted.
        $this->assertEqual($entity->{$field_name}[$langcode][0]['value'], $values[$index][$field_name], t('Entity %index: expected value was found.', array('%index' => $index)));
        // The value added in hook_field_load() is found.
        $this->assertEqual($entity->{$field_name}[$langcode][0]['additional_key'], 'additional_value', t('Entity %index: extra information was found', array('%index' => $index)));
      }
    }

    // Check that the single-field load option works.
    $entity = field_test_create_stub_entity(1, 1, $bundles[1]);
    field_attach_load($entity_type, array(1 => $entity), FIELD_LOAD_CURRENT, array('field_id' => $field_ids[1]));
    $this->assertEqual($entity->{$field_names[1]}[$langcode][0]['value'], $values[1][$field_names[1]], t('Entity %index: expected value was found.', array('%index' => 1)));
    $this->assertEqual($entity->{$field_names[1]}[$langcode][0]['additional_key'], 'additional_value', t('Entity %index: extra information was found', array('%index' => 1)));
    $this->assert(!isset($entity->{$field_names[2]}), t('Entity %index: field %field_name is not loaded.', array('%index' => 2, '%field_name' => $field_names[2])));
    $this->assert(!isset($entity->{$field_names[3]}), t('Entity %index: field %field_name is not loaded.', array('%index' => 3, '%field_name' => $field_names[3])));
  }

  /**
   * Test saving and loading fields using different storage backends.
   */
  function testFieldAttachSaveLoadDifferentStorage() {
    $entity_type = 'test_entity';
    $langcode = LANGUAGE_NONE;

    // Create two fields using different storage backends, and their instances.
    $fields = array(
      array(
        'field_name' => 'field_1',
        'type' => 'test_field',
        'cardinality' => 4,
        'storage' => array('type' => 'field_sql_storage')
      ),
      array(
        'field_name' => 'field_2',
        'type' => 'test_field',
        'cardinality' => 4,
        'storage' => array('type' => 'field_test_storage')
      ),
    );
    foreach ($fields as $field) {
      field_create_field($field);
      $instance = array(
        'field_name' => $field['field_name'],
        'entity_type' => 'test_entity',
        'bundle' => 'test_bundle',
      );
      field_create_instance($instance);
    }

    $entity_init = field_test_create_stub_entity();

    // Create entity and insert random values.
    $entity = clone($entity_init);
    $values = array();
    foreach ($fields as $field) {
      $values[$field['field_name']] = $this->_generateTestFieldValues($this->field['cardinality']);
      $entity->{$field['field_name']}[$langcode] = $values[$field['field_name']];
    }
    field_attach_insert($entity_type, $entity);

    // Check that values are loaded as expected.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    foreach ($fields as $field) {
      $this->assertEqual($values[$field['field_name']], $entity->{$field['field_name']}[$langcode], t('%storage storage: expected values were found.', array('%storage' => $field['storage']['type'])));
    }
  }

  /**
   * Test storage details alteration.
   *
   * @see field_test_storage_details_alter()
   */
  function testFieldStorageDetailsAlter() {
    $field_name = 'field_test_change_my_details';
    $field = array(
      'field_name' => $field_name,
      'type' => 'test_field',
      'cardinality' => 4,
      'storage' => array('type' => 'field_test_storage'),
    );
    $field = field_create_field($field);
    $instance = array(
      'field_name' => $field_name,
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
    );
    field_create_instance($instance);

    $field = field_info_field($instance['field_name']);
    $instance = field_info_instance($instance['entity_type'], $instance['field_name'], $instance['bundle']);

    // The storage details are indexed by a storage engine type.
    $this->assertTrue(array_key_exists('drupal_variables', $field['storage']['details']), t('The storage type is Drupal variables.'));

    $details = $field['storage']['details']['drupal_variables'];

    // The field_test storage details are indexed by variable name. The details
    // are altered, so moon and mars are correct for this test.
    $this->assertTrue(array_key_exists('moon', $details[FIELD_LOAD_CURRENT]), t('Moon is available in the instance array.'));
    $this->assertTrue(array_key_exists('mars', $details[FIELD_LOAD_REVISION]), t('Mars is available in the instance array.'));

    // Test current and revision storage details together because the columns
    // are the same.
    foreach ((array) $field['columns'] as $column_name => $attributes) {
      $this->assertEqual($details[FIELD_LOAD_CURRENT]['moon'][$column_name], $column_name, t('Column name %value matches the definition in %bin.', array('%value' => $column_name, '%bin' => 'moon[FIELD_LOAD_CURRENT]')));
      $this->assertEqual($details[FIELD_LOAD_REVISION]['mars'][$column_name], $column_name, t('Column name %value matches the definition in %bin.', array('%value' => $column_name, '%bin' => 'mars[FIELD_LOAD_REVISION]')));
    }
  }

  /**
   * Tests insert and update with missing or NULL fields.
   */
  function testFieldAttachSaveMissingData() {
    $entity_type = 'test_entity';
    $entity_init = field_test_create_stub_entity();
    $langcode = LANGUAGE_NONE;

    // Insert: Field is missing.
    $entity = clone($entity_init);
    field_attach_insert($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertTrue(empty($entity->{$this->field_name}), t('Insert: missing field results in no value saved'));

    // Insert: Field is NULL.
    field_cache_clear();
    $entity = clone($entity_init);
    $entity->{$this->field_name} = NULL;
    field_attach_insert($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertTrue(empty($entity->{$this->field_name}), t('Insert: NULL field results in no value saved'));

    // Add some real data.
    field_cache_clear();
    $entity = clone($entity_init);
    $values = $this->_generateTestFieldValues(1);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_insert($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertEqual($entity->{$this->field_name}[$langcode], $values, t('Field data saved'));

    // Update: Field is missing. Data should survive.
    field_cache_clear();
    $entity = clone($entity_init);
    field_attach_update($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertEqual($entity->{$this->field_name}[$langcode], $values, t('Update: missing field leaves existing values in place'));

    // Update: Field is NULL. Data should be wiped.
    field_cache_clear();
    $entity = clone($entity_init);
    $entity->{$this->field_name} = NULL;
    field_attach_update($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertTrue(empty($entity->{$this->field_name}), t('Update: NULL field removes existing values'));

    // Re-add some data.
    field_cache_clear();
    $entity = clone($entity_init);
    $values = $this->_generateTestFieldValues(1);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_update($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertEqual($entity->{$this->field_name}[$langcode], $values, t('Field data saved'));

    // Update: Field is empty array. Data should be wiped.
    field_cache_clear();
    $entity = clone($entity_init);
    $entity->{$this->field_name} = array();
    field_attach_update($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertTrue(empty($entity->{$this->field_name}), t('Update: empty array removes existing values'));
  }

  /**
   * Test insert with missing or NULL fields, with default value.
   */
  function testFieldAttachSaveMissingDataDefaultValue() {
    // Add a default value function.
    $this->instance['default_value_function'] = 'field_test_default_value';
    field_update_instance($this->instance);

    $entity_type = 'test_entity';
    $entity_init = field_test_create_stub_entity();
    $langcode = LANGUAGE_NONE;

    // Insert: Field is NULL.
    $entity = clone($entity_init);
    $entity->{$this->field_name}[$langcode] = NULL;
    field_attach_insert($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertTrue(empty($entity->{$this->field_name}[$langcode]), t('Insert: NULL field results in no value saved'));

    // Insert: Field is missing.
    field_cache_clear();
    $entity = clone($entity_init);
    field_attach_insert($entity_type, $entity);

    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $values = field_test_default_value($entity_type, $entity, $this->field, $this->instance);
    $this->assertEqual($entity->{$this->field_name}[$langcode], $values, t('Insert: missing field results in default value saved'));
  }

  /**
   * Test field_attach_delete().
   */
  function testFieldAttachDelete() {
    $entity_type = 'test_entity';
    $langcode = LANGUAGE_NONE;
    $rev[0] = field_test_create_stub_entity(0, 0, $this->instance['bundle']);

    // Create revision 0
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $rev[0]->{$this->field_name}[$langcode] = $values;
    field_attach_insert($entity_type, $rev[0]);

    // Create revision 1
    $rev[1] = field_test_create_stub_entity(0, 1, $this->instance['bundle']);
    $rev[1]->{$this->field_name}[$langcode] = $values;
    field_attach_update($entity_type, $rev[1]);

    // Create revision 2
    $rev[2] = field_test_create_stub_entity(0, 2, $this->instance['bundle']);
    $rev[2]->{$this->field_name}[$langcode] = $values;
    field_attach_update($entity_type, $rev[2]);

    // Confirm each revision loads
    foreach (array_keys($rev) as $vid) {
      $read = field_test_create_stub_entity(0, $vid, $this->instance['bundle']);
      field_attach_load_revision($entity_type, array(0 => $read));
      $this->assertEqual(count($read->{$this->field_name}[$langcode]), $this->field['cardinality'], "The test entity revision $vid has {$this->field['cardinality']} values.");
    }

    // Delete revision 1, confirm the other two still load.
    field_attach_delete_revision($entity_type, $rev[1]);
    foreach (array(0, 2) as $vid) {
      $read = field_test_create_stub_entity(0, $vid, $this->instance['bundle']);
      field_attach_load_revision($entity_type, array(0 => $read));
      $this->assertEqual(count($read->{$this->field_name}[$langcode]), $this->field['cardinality'], "The test entity revision $vid has {$this->field['cardinality']} values.");
    }

    // Confirm the current revision still loads
    $read = field_test_create_stub_entity(0, 2, $this->instance['bundle']);
    field_attach_load($entity_type, array(0 => $read));
    $this->assertEqual(count($read->{$this->field_name}[$langcode]), $this->field['cardinality'], "The test entity current revision has {$this->field['cardinality']} values.");

    // Delete all field data, confirm nothing loads
    field_attach_delete($entity_type, $rev[2]);
    foreach (array(0, 1, 2) as $vid) {
      $read = field_test_create_stub_entity(0, $vid, $this->instance['bundle']);
      field_attach_load_revision($entity_type, array(0 => $read));
      $this->assertIdentical($read->{$this->field_name}, array(), "The test entity revision $vid is deleted.");
    }
    $read = field_test_create_stub_entity(0, 2, $this->instance['bundle']);
    field_attach_load($entity_type, array(0 => $read));
    $this->assertIdentical($read->{$this->field_name}, array(), t('The test entity current revision is deleted.'));
  }

  /**
   * Test field_attach_create_bundle() and field_attach_rename_bundle().
   */
  function testFieldAttachCreateRenameBundle() {
    // Create a new bundle. This has to be initiated by the module so that its
    // hook_entity_info() is consistent.
    $new_bundle = 'test_bundle_' . drupal_strtolower($this->randomName());
    field_test_create_bundle($new_bundle);

    // Add an instance to that bundle.
    $this->instance['bundle'] = $new_bundle;
    field_create_instance($this->instance);

    // Save an entity with data in the field.
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    $langcode = LANGUAGE_NONE;
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity->{$this->field_name}[$langcode] = $values;
    $entity_type = 'test_entity';
    field_attach_insert($entity_type, $entity);

    // Verify the field data is present on load.
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    field_attach_load($entity_type, array(0 => $entity));
    $this->assertEqual(count($entity->{$this->field_name}[$langcode]), $this->field['cardinality'], "Data is retrieved for the new bundle");

    // Rename the bundle. This has to be initiated by the module so that its
    // hook_entity_info() is consistent.
    $new_bundle = 'test_bundle_' . drupal_strtolower($this->randomName());
    field_test_rename_bundle($this->instance['bundle'], $new_bundle);

    // Check that the instance definition has been updated.
    $this->instance = field_info_instance($entity_type, $this->field_name, $new_bundle);
    $this->assertIdentical($this->instance['bundle'], $new_bundle, "Bundle name has been updated in the instance.");

    // Verify the field data is present on load.
    $entity = field_test_create_stub_entity(0, 0, $new_bundle);
    field_attach_load($entity_type, array(0 => $entity));
    $this->assertEqual(count($entity->{$this->field_name}[$langcode]), $this->field['cardinality'], "Bundle name has been updated in the field storage");
  }

  /**
   * Test field_attach_delete_bundle().
   */
  function testFieldAttachDeleteBundle() {
    // Create a new bundle. This has to be initiated by the module so that its
    // hook_entity_info() is consistent.
    $new_bundle = 'test_bundle_' . drupal_strtolower($this->randomName());
    field_test_create_bundle($new_bundle);

    // Add an instance to that bundle.
    $this->instance['bundle'] = $new_bundle;
    field_create_instance($this->instance);

    // Create a second field for the test bundle
    $field_name = drupal_strtolower($this->randomName() . '_field_name');
    $field = array('field_name' => $field_name, 'type' => 'test_field', 'cardinality' => 1);
    field_create_field($field);
    $instance = array(
      'field_name' => $field_name,
      'entity_type' => 'test_entity',
      'bundle' => $this->instance['bundle'],
      'label' => $this->randomName() . '_label',
      'description' => $this->randomName() . '_description',
      'weight' => mt_rand(0, 127),
      // test_field has no instance settings
      'widget' => array(
        'type' => 'test_field_widget',
        'settings' => array(
          'size' => mt_rand(0, 255))));
    field_create_instance($instance);

    // Save an entity with data for both fields
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    $langcode = LANGUAGE_NONE;
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity->{$this->field_name}[$langcode] = $values;
    $entity->{$field_name}[$langcode] = $this->_generateTestFieldValues(1);
    field_attach_insert('test_entity', $entity);

    // Verify the fields are present on load
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    field_attach_load('test_entity', array(0 => $entity));
    $this->assertEqual(count($entity->{$this->field_name}[$langcode]), 4, 'First field got loaded');
    $this->assertEqual(count($entity->{$field_name}[$langcode]), 1, 'Second field got loaded');

    // Delete the bundle. This has to be initiated by the module so that its
    // hook_entity_info() is consistent.
    field_test_delete_bundle($this->instance['bundle']);

    // Verify no data gets loaded
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    field_attach_load('test_entity', array(0 => $entity));
    $this->assertFalse(isset($entity->{$this->field_name}[$langcode]), 'No data for first field');
    $this->assertFalse(isset($entity->{$field_name}[$langcode]), 'No data for second field');

    // Verify that the instances are gone
    $this->assertFalse(field_read_instance('test_entity', $this->field_name, $this->instance['bundle']), "First field is deleted");
    $this->assertFalse(field_read_instance('test_entity', $field_name, $instance['bundle']), "Second field is deleted");
  }
}

/**
 * Unit test class for non-storage related field_attach_* functions.
 */
class FieldAttachOtherTestCase extends FieldAttachTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field attach tests (other)',
      'description' => 'Test other Field Attach API functions.',
      'group' => 'Field API',
    );
  }

  /**
   * Test field_attach_view() and field_attach_prepare_view().
   */
  function testFieldAttachView() {
    $entity_type = 'test_entity';
    $entity_init = field_test_create_stub_entity();
    $langcode = LANGUAGE_NONE;

    // Populate values to be displayed.
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity_init->{$this->field_name}[$langcode] = $values;

    // Simple formatter, label displayed.
    $entity = clone($entity_init);
    $formatter_setting = $this->randomName();
    $this->instance['display'] = array(
      'full' => array(
        'label' => 'above',
        'type' => 'field_test_default',
        'settings' => array(
          'test_formatter_setting' => $formatter_setting,
        )
      ),
    );
    field_update_instance($this->instance);
    field_attach_prepare_view($entity_type, array($entity->ftid => $entity), 'full');
    $entity->content = field_attach_view($entity_type, $entity, 'full');
    $output = drupal_render($entity->content);
    $this->content = $output;
    $this->assertRaw($this->instance['label'], "Label is displayed.");
    foreach ($values as $delta => $value) {
      $this->content = $output;
      $this->assertRaw("$formatter_setting|{$value['value']}", "Value $delta is displayed, formatter settings are applied.");
    }

    // Label hidden.
    $entity = clone($entity_init);
    $this->instance['display']['full']['label'] = 'hidden';
    field_update_instance($this->instance);
    field_attach_prepare_view($entity_type, array($entity->ftid => $entity), 'full');
    $entity->content = field_attach_view($entity_type, $entity, 'full');
    $output = drupal_render($entity->content);
    $this->content = $output;
    $this->assertNoRaw($this->instance['label'], "Hidden label: label is not displayed.");

    // Field hidden.
    $entity = clone($entity_init);
    $this->instance['display'] = array(
      'full' => array(
        'label' => 'above',
        'type' => 'hidden',
      ),
    );
    field_update_instance($this->instance);
    field_attach_prepare_view($entity_type, array($entity->ftid => $entity), 'full');
    $entity->content = field_attach_view($entity_type, $entity, 'full');
    $output = drupal_render($entity->content);
    $this->content = $output;
    $this->assertNoRaw($this->instance['label'], "Hidden field: label is not displayed.");
    foreach ($values as $delta => $value) {
      $this->assertNoRaw($value['value'], "Hidden field: value $delta is not displayed.");
    }

    // Multiple formatter.
    $entity = clone($entity_init);
    $formatter_setting = $this->randomName();
    $this->instance['display'] = array(
      'full' => array(
        'label' => 'above',
        'type' => 'field_test_multiple',
        'settings' => array(
          'test_formatter_setting_multiple' => $formatter_setting,
        )
      ),
    );
    field_update_instance($this->instance);
    field_attach_prepare_view($entity_type, array($entity->ftid => $entity), 'full');
    $entity->content = field_attach_view($entity_type, $entity, 'full');
    $output = drupal_render($entity->content);
    $display = $formatter_setting;
    foreach ($values as $delta => $value) {
      $display .= "|$delta:{$value['value']}";
    }
    $this->content = $output;
    $this->assertRaw($display, "Multiple formatter: all values are displayed, formatter settings are applied.");

    // Test a formatter that uses hook_field_formatter_prepare_view().
    $entity = clone($entity_init);
    $formatter_setting = $this->randomName();
    $this->instance['display'] = array(
      'full' => array(
        'label' => 'above',
        'type' => 'field_test_with_prepare_view',
        'settings' => array(
          'test_formatter_setting_additional' => $formatter_setting,
        )
      ),
    );
    field_update_instance($this->instance);
    field_attach_prepare_view($entity_type, array($entity->ftid => $entity), 'full');
    $entity->content = field_attach_view($entity_type, $entity, 'full');
    $output = drupal_render($entity->content);
    $this->content = $output;
    foreach ($values as $delta => $value) {
      $this->content = $output;
      $expected = $formatter_setting . '|' . $value['value'] . '|' . ($value['value'] + 1);
      $this->assertRaw($expected, "Value $delta is displayed, formatter settings are applied.");
    }

    // TODO:
    // - check display order with several fields

    // Preprocess template.
    $variables = array();
    field_attach_preprocess($entity_type, $entity, $entity->content, $variables);
    $result = TRUE;
    foreach ($values as $delta => $item) {
      if ($variables[$this->field_name][$delta]['value'] !== $item['value']) {
        $result = FALSE;
        break;
      }
    }
    $this->assertTrue($result, t('Variable $@field_name correctly populated.', array('@field_name' => $this->field_name)));
  }

  /**
   * Tests the 'multiple entity' behavior of field_attach_prepare_view().
   */
  function testFieldAttachPrepareViewMultiple() {
    $entity_type = 'test_entity';
    $langcode = LANGUAGE_NONE;

    // Set the instance to be hidden.
    $this->instance['display']['full']['type'] = 'hidden';
    field_update_instance($this->instance);

    // Set up a second instance on another bundle, with a formatter that uses
    // hook_field_formatter_prepare_view().
    field_test_create_bundle('test_bundle_2');
    $formatter_setting = $this->randomName();
    $this->instance2 = $this->instance;
    $this->instance2['bundle'] = 'test_bundle_2';
    $this->instance2['display']['full'] = array(
      'type' => 'field_test_with_prepare_view',
      'settings' => array(
        'test_formatter_setting_additional' => $formatter_setting,
      )
    );
    field_create_instance($this->instance2);

    // Create one entity in each bundle.
    $entity1_init = field_test_create_stub_entity(1, 1, 'test_bundle');
    $values1 = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity1_init->{$this->field_name}[$langcode] = $values1;

    $entity2_init = field_test_create_stub_entity(2, 2, 'test_bundle_2');
    $values2 = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity2_init->{$this->field_name}[$langcode] = $values2;

    // Run prepare_view, and check that the entities come out as expected.
    $entity1 = clone($entity1_init);
    $entity2 = clone($entity2_init);
    field_attach_prepare_view($entity_type, array($entity1->ftid => $entity1, $entity2->ftid => $entity2), 'full');
    $this->assertFalse(isset($entity1->{$this->field_name}[$langcode][0]['additional_formatter_value']), 'Entity 1 did not run through the prepare_view hook.');
    $this->assertTrue(isset($entity2->{$this->field_name}[$langcode][0]['additional_formatter_value']), 'Entity 2 ran through the prepare_view hook.');

    // Same thing, reversed order.
    $entity1 = clone($entity1_init);
    $entity2 = clone($entity2_init);
    field_attach_prepare_view($entity_type, array($entity2->ftid => $entity2, $entity1->ftid => $entity1), 'full');
    $this->assertFalse(isset($entity1->{$this->field_name}[$langcode][0]['additional_formatter_value']), 'Entity 1 did not run through the prepare_view hook.');
    $this->assertTrue(isset($entity2->{$this->field_name}[$langcode][0]['additional_formatter_value']), 'Entity 2 ran through the prepare_view hook.');
  }

  /**
   * Test field cache.
   */
  function testFieldAttachCache() {
    // Initialize random values and a test entity.
    $entity_init = field_test_create_stub_entity(1, 1, $this->instance['bundle']);
    $langcode = LANGUAGE_NONE;
    $values = $this->_generateTestFieldValues($this->field['cardinality']);

    // Non-cacheable entity type.
    $entity_type = 'test_entity';
    $cid = "field:$entity_type:{$entity_init->ftid}";

    // Check that no initial cache entry is present.
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Non-cached: no initial cache entry'));

    // Save, and check that no cache entry is present.
    $entity = clone($entity_init);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_insert($entity_type, $entity);
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Non-cached: no cache entry on insert'));

    // Load, and check that no cache entry is present.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Non-cached: no cache entry on load'));


    // Cacheable entity type.
    $entity_type = 'test_cacheable_entity';
    $cid = "field:$entity_type:{$entity_init->ftid}";
    $instance = $this->instance;
    $instance['entity_type'] = $entity_type;
    field_create_instance($instance);

    // Check that no initial cache entry is present.
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no initial cache entry'));

    // Save, and check that no cache entry is present.
    $entity = clone($entity_init);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_insert($entity_type, $entity);
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no cache entry on insert'));

    // Load a single field, and check that no cache entry is present.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity), FIELD_LOAD_CURRENT, array('field_id' => $this->field_id));
    $cache = cache_get($cid, 'cache_field');
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no cache entry on loading a single field'));

    // Load, and check that a cache entry is present with the expected values.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $cache = cache_get($cid, 'cache_field');
    $this->assertEqual($cache->data[$this->field_name][$langcode], $values, t('Cached: correct cache entry on load'));

    // Update with different values, and check that the cache entry is wiped.
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity = clone($entity_init);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_update($entity_type, $entity);
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no cache entry on update'));

    // Load, and check that a cache entry is present with the expected values.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $cache = cache_get($cid, 'cache_field');
    $this->assertEqual($cache->data[$this->field_name][$langcode], $values, t('Cached: correct cache entry on load'));

    // Create a new revision, and check that the cache entry is wiped.
    $entity_init = field_test_create_stub_entity(1, 2, $this->instance['bundle']);
    $values = $this->_generateTestFieldValues($this->field['cardinality']);
    $entity = clone($entity_init);
    $entity->{$this->field_name}[$langcode] = $values;
    field_attach_update($entity_type, $entity);
    $cache = cache_get($cid, 'cache_field');
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no cache entry on new revision creation'));

    // Load, and check that a cache entry is present with the expected values.
    $entity = clone($entity_init);
    field_attach_load($entity_type, array($entity->ftid => $entity));
    $cache = cache_get($cid, 'cache_field');
    $this->assertEqual($cache->data[$this->field_name][$langcode], $values, t('Cached: correct cache entry on load'));

    // Delete, and check that the cache entry is wiped.
    field_attach_delete($entity_type, $entity);
    $this->assertFalse(cache_get($cid, 'cache_field'), t('Cached: no cache entry after delete'));
  }

  /**
   * Test field_attach_validate().
   *
   * Verify that field_attach_validate() invokes the correct
   * hook_field_validate.
   */
  function testFieldAttachValidate() {
    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);
    $langcode = LANGUAGE_NONE;

    // Set up values to generate errors
    $values = array();
    for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
      $values[$delta]['value'] = -1;
    }
    // Arrange for item 1 not to generate an error
    $values[1]['value'] = 1;
    $entity->{$this->field_name}[$langcode] = $values;

    try {
      field_attach_validate($entity_type, $entity);
    }
    catch (FieldValidationException $e) {
      $errors = $e->errors;
    }

    foreach ($values as $delta => $value) {
      if ($value['value'] != 1) {
        $this->assertIdentical($errors[$this->field_name][$langcode][$delta][0]['error'], 'field_test_invalid', "Error set on value $delta");
        $this->assertEqual(count($errors[$this->field_name][$langcode][$delta]), 1, "Only one error set on value $delta");
        unset($errors[$this->field_name][$langcode][$delta]);
      }
      else {
        $this->assertFalse(isset($errors[$this->field_name][$langcode][$delta]), "No error set on value $delta");
      }
    }
    $this->assertEqual(count($errors[$this->field_name][$langcode]), 0, 'No extraneous errors set');

    // Check that cardinality is validated.
    $entity->{$this->field_name}[$langcode] = $this->_generateTestFieldValues($this->field['cardinality'] + 1);
    try {
      field_attach_validate($entity_type, $entity);
    }
    catch (FieldValidationException $e) {
      $errors = $e->errors;
    }
    $this->assertEqual($errors[$this->field_name][$langcode][0][0]['error'], 'field_cardinality', t('Cardinality validation failed.'));

  }

  /**
   * Test field_attach_form().
   *
   * This could be much more thorough, but it does verify that the correct
   * widgets show up.
   */
  function testFieldAttachForm() {
    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);

    $form = array();
    $form_state = form_state_defaults();
    field_attach_form($entity_type, $entity, $form, $form_state);

    $langcode = LANGUAGE_NONE;
    $this->assertEqual($form[$this->field_name][$langcode]['#title'], $this->instance['label'], "Form title is {$this->instance['label']}");
    for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
      // field_test_widget uses 'textfield'
      $this->assertEqual($form[$this->field_name][$langcode][$delta]['value']['#type'], 'textfield', "Form delta $delta widget is textfield");
    }
  }

  /**
   * Test field_attach_submit().
   */
  function testFieldAttachSubmit() {
    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);

    // Build the form.
    $form = array();
    $form_state = form_state_defaults();
    field_attach_form($entity_type, $entity, $form, $form_state);

    // Simulate incoming values.
    $values = array();
    $weights = array();
    for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
      $values[$delta]['value'] = mt_rand(1, 127);
      // Assign random weight.
      do {
        $weight = mt_rand(0, $this->field['cardinality']);
      } while (in_array($weight, $weights));
      $weights[$delta] = $weight;
      $values[$delta]['_weight'] = $weight;
    }
    // Leave an empty value. 'field_test' fields are empty if empty().
    $values[1]['value'] = 0;

    $langcode = LANGUAGE_NONE;
    // Pretend the form has been built.
    drupal_prepare_form('field_test_entity_form', $form, $form_state);
    drupal_process_form('field_test_entity_form', $form, $form_state);
    $form_state['values'][$this->field_name][$langcode] = $values;
    field_attach_submit($entity_type, $entity, $form, $form_state);

    asort($weights);
    $expected_values = array();
    foreach ($weights as $key => $value) {
      if ($key != 1) {
        $expected_values[] = array('value' => $values[$key]['value']);
      }
    }
    $this->assertIdentical($entity->{$this->field_name}[$langcode], $expected_values, 'Submit filters empty values');
  }
}

class FieldInfoTestCase extends FieldTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Field info tests',
      'description' => 'Get information about existing fields, instances and bundles.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('field_test');
  }

  /**
   * Test that field types and field definitions are correcly cached.
   */
  function testFieldInfo() {
    // Test that field_test module's fields, widgets, and formatters show up.

    $field_test_info = field_test_field_info();
    // We need to account for the existence of user_field_info_alter().
    foreach (array_keys($field_test_info) as $name) {
      $field_test_info[$name]['instance_settings']['user_register_form'] = FALSE;
    }
    $info = field_info_field_types();
    foreach ($field_test_info as $t_key => $field_type) {
      foreach ($field_type as $key => $val) {
        $this->assertEqual($info[$t_key][$key], $val, t("Field type $t_key key $key is $val"));
      }
      $this->assertEqual($info[$t_key]['module'], 'field_test',  t("Field type field_test module appears"));
    }

    $formatter_info = field_test_field_formatter_info();
    $info = field_info_formatter_types();
    foreach ($formatter_info as $f_key => $formatter) {
      foreach ($formatter as $key => $val) {
        $this->assertEqual($info[$f_key][$key], $val, t("Formatter type $f_key key $key is $val"));
      }
      $this->assertEqual($info[$f_key]['module'], 'field_test',  t("Formatter type field_test module appears"));
    }

    $widget_info = field_test_field_widget_info();
    $info = field_info_widget_types();
    foreach ($widget_info as $w_key => $widget) {
      foreach ($widget as $key => $val) {
        $this->assertEqual($info[$w_key][$key], $val, t("Widget type $w_key key $key is $val"));
      }
      $this->assertEqual($info[$w_key]['module'], 'field_test',  t("Widget type field_test module appears"));
    }

    $storage_info = field_test_field_storage_info();
    $info = field_info_storage_types();
    foreach ($storage_info as $s_key => $storage) {
      foreach ($storage as $key => $val) {
        $this->assertEqual($info[$s_key][$key], $val, t("Storage type $s_key key $key is $val"));
      }
      $this->assertEqual($info[$s_key]['module'], 'field_test',  t("Storage type field_test module appears"));
    }

    // Verify that no unexpected instances exist.
    $core_fields = field_info_fields();
    $instances = field_info_instances('test_entity', 'test_bundle');
    $this->assertTrue(empty($instances), t('With no instances, info bundles is empty.'));

    // Create a field, verify it shows up.
    $field = array(
      'field_name' => drupal_strtolower($this->randomName()),
      'type' => 'test_field',
    );
    field_create_field($field);
    $fields = field_info_fields();
    $this->assertEqual(count($fields), count($core_fields) + 1, t('One new field exists'));
    $this->assertEqual($fields[$field['field_name']]['field_name'], $field['field_name'], t('info fields contains field name'));
    $this->assertEqual($fields[$field['field_name']]['type'], $field['type'], t('info fields contains field type'));
    $this->assertEqual($fields[$field['field_name']]['module'], 'field_test', t('info fields contains field module'));
    $settings = array('test_field_setting' => 'dummy test string');
    foreach ($settings as $key => $val) {
      $this->assertEqual($fields[$field['field_name']]['settings'][$key], $val, t("Field setting $key has correct default value $val"));
    }
    $this->assertEqual($fields[$field['field_name']]['cardinality'], 1, t('info fields contains cardinality 1'));
    $this->assertEqual($fields[$field['field_name']]['active'], 1, t('info fields contains active 1'));

    // Create an instance, verify that it shows up
    $instance = array(
      'field_name' => $field['field_name'],
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'label' => $this->randomName(),
      'description' => $this->randomName(),
      'weight' => mt_rand(0, 127),
      // test_field has no instance settings
      'widget' => array(
        'type' => 'test_field_widget',
        'settings' => array(
          'test_setting' => 999)));
    field_create_instance($instance);

    $instances = field_info_instances('test_entity', $instance['bundle']);
    $this->assertEqual(count($instances), 1, t('One instance shows up in info when attached to a bundle.'));
    $this->assertTrue($instance < $instances[$instance['field_name']], t('Instance appears in info correctly'));
  }

  /**
   * Test that cached field definitions are ready for current runtime context.
   */
  function testFieldPrepare() {
    $field_definition = array(
      'field_name' => 'field',
      'type' => 'test_field',
    );
    field_create_field($field_definition);

    // Simulate a stored field definition missing a field setting (e.g. a
    // third-party module adding a new field setting has been enabled, and
    // existing fields do not know the setting yet).
    $data = db_query('SELECT data FROM {field_config} WHERE field_name = :field_name', array(':field_name' => $field_definition['field_name']))->fetchField();
    $data = unserialize($data);
    $data['settings'] = array();
    db_update('field_config')
      ->fields(array('data' => serialize($data)))
      ->condition('field_name', $field_definition['field_name'])
      ->execute();

    field_cache_clear();

    // Read the field back.
    $field = field_info_field($field_definition['field_name']);

    // Check that all expected settings are in place.
    $field_type = field_info_field_types($field_definition['type']);
    $this->assertIdentical($field['settings'], $field_type['settings'], t('All expected default field settings are present.'));
  }

  /**
   * Test that cached instance definitions are ready for current runtime context.
   */
  function testInstancePrepare() {
    $field_definition = array(
      'field_name' => 'field',
      'type' => 'test_field',
    );
    field_create_field($field_definition);
    $instance_definition = array(
      'field_name' => $field_definition['field_name'],
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
    );
    field_create_instance($instance_definition);

    // Simulate a stored instance definition missing various settings (e.g. a
    // third-party module adding instance, widget or display settings has been
    // enabled, but existing instances do not know the new settings).
    $data = db_query('SELECT data FROM {field_config_instance} WHERE field_name = :field_name AND bundle = :bundle', array(':field_name' => $instance_definition['field_name'], ':bundle' => $instance_definition['bundle']))->fetchField();
    $data = unserialize($data);
    $data['settings'] = array();
    $data['widget']['settings'] = 'unavailable_widget';
    $data['widget']['settings'] = array();
    $data['display']['default']['type'] = 'unavailable_formatter';
    $data['display']['default']['settings'] = array();
    db_update('field_config_instance')
      ->fields(array('data' => serialize($data)))
      ->condition('field_name', $instance_definition['field_name'])
      ->condition('bundle', $instance_definition['bundle'])
      ->execute();

    field_cache_clear();

    // Read the instance back.
    $instance = field_info_instance($instance_definition['entity_type'], $instance_definition['field_name'], $instance_definition['bundle']);

    // Check that all expected instance settings are in place.
    $field_type = field_info_field_types($field_definition['type']);
    $this->assertIdentical($instance['settings'], $field_type['instance_settings'] , t('All expected instance settings are present.'));

    // Check that the default widget is used and expected settings are in place.
    $this->assertIdentical($instance['widget']['type'], $field_type['default_widget'], t('Unavailable widget replaced with default widget.'));
    $widget_type = field_info_widget_types($instance['widget']['type']);
    $this->assertIdentical($instance['widget']['settings'], $widget_type['settings'] , t('All expected widget settings are present.'));

    // Check that display settings are set for the 'default' mode.
    $display = $instance['display']['default'];
    $this->assertIdentical($display['type'], $field_type['default_formatter'], t("Formatter is set for the 'default' view mode"));
    $formatter_type = field_info_formatter_types($display['type']);
    $this->assertIdentical($display['settings'], $formatter_type['settings'] , t("Formatter settings are set for the 'default' view mode"));
  }

  /**
   * Test that instances on disabled entity types are filtered out.
   */
  function testInstanceDisabledEntityType() {
    // For this test the field type and the entity type must be exposed by
    // different modules.
    $field_definition = array(
      'field_name' => 'field',
      'type' => 'test_field',
    );
    field_create_field($field_definition);
    $instance_definition = array(
      'field_name' => 'field',
      'entity_type' => 'comment',
      'bundle' => 'comment_node_article',
    );
    field_create_instance($instance_definition);

    // Disable coment module. This clears field_info cache.
    module_disable(array('comment'));
    $this->assertNull(field_info_instance('comment', 'field', 'comment_node_article'), t('No instances are returned on disabled entity types.'));
  }

  /**
   * Test that the field_info settings convenience functions work.
   */
  function testSettingsInfo() {
    $info = field_test_field_info();
    // We need to account for the existence of user_field_info_alter().
    foreach (array_keys($info) as $name) {
      $info[$name]['instance_settings']['user_register_form'] = FALSE;
    }
    foreach ($info as $type => $data) {
      $this->assertIdentical(field_info_field_settings($type), $data['settings'], "field_info_field_settings returns {$type}'s field settings");
      $this->assertIdentical(field_info_instance_settings($type), $data['instance_settings'], "field_info_field_settings returns {$type}'s field instance settings");
    }

    $info = field_test_field_widget_info();
    foreach ($info as $type => $data) {
      $this->assertIdentical(field_info_widget_settings($type), $data['settings'], "field_info_widget_settings returns {$type}'s widget settings");
    }

    $info = field_test_field_formatter_info();
    foreach ($info as $type => $data) {
      $this->assertIdentical(field_info_formatter_settings($type), $data['settings'], "field_info_formatter_settings returns {$type}'s formatter settings");
    }
  }
}

class FieldFormTestCase extends FieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field form tests',
      'description' => 'Test Field form handling.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('field_test');

    $web_user = $this->drupalCreateUser(array('access field_test content', 'administer field_test content'));
    $this->drupalLogin($web_user);

    $this->field_single = array('field_name' => 'field_single', 'type' => 'test_field');
    $this->field_multiple = array('field_name' => 'field_multiple', 'type' => 'test_field', 'cardinality' => 4);
    $this->field_unlimited = array('field_name' => 'field_unlimited', 'type' => 'test_field', 'cardinality' => FIELD_CARDINALITY_UNLIMITED);

    $this->instance = array(
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'label' => $this->randomName() . '_label',
      'description' => $this->randomName() . '_description',
      'weight' => mt_rand(0, 127),
      'settings' => array(
        'test_instance_setting' => $this->randomName(),
      ),
      'widget' => array(
        'type' => 'test_field_widget',
        'label' => 'Test Field',
        'settings' => array(
          'test_widget_setting' => $this->randomName(),
        )
      )
    );
  }

  function testFieldFormSingle() {
    $this->field = $this->field_single;
    $this->field_name = $this->field['field_name'];
    $this->instance['field_name'] = $this->field_name;
    field_create_field($this->field);
    field_create_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    // Display creation form.
    $this->drupalGet('test-entity/add/test-bundle');
    $this->assertFieldByName("{$this->field_name}[$langcode][0][value]", '', 'Widget is displayed');
    $this->assertNoField("{$this->field_name}[$langcode][1][value]", 'No extraneous widget is displayed');
    // TODO : check that the widget is populated with default value ?

    // Submit with invalid value (field-level validation).
    $edit = array("{$this->field_name}[$langcode][0][value]" => -1);
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertRaw(t('%name does not accept the value -1.', array('%name' => $this->instance['label'])), 'Field validation fails with invalid input.');
    // TODO : check that the correct field is flagged for error.

    // Create an entity
    $value = mt_rand(1, 127);
    $edit = array("{$this->field_name}[$langcode][0][value]" => $value);
    $this->drupalPost(NULL, $edit, t('Save'));
    preg_match('|test-entity/manage/(\d+)/edit|', $this->url, $match);
    $id = $match[1];
    $this->assertRaw(t('test_entity @id has been created.', array('@id' => $id)), 'Entity was created');
    $entity = field_test_entity_test_load($id);
    $this->assertEqual($entity->{$this->field_name}[$langcode][0]['value'], $value, 'Field value was saved');

    // Display edit form.
    $this->drupalGet('test-entity/manage/' . $id . '/edit');
    $this->assertFieldByName("{$this->field_name}[$langcode][0][value]", $value, 'Widget is displayed with the correct default value');
    $this->assertNoField("{$this->field_name}[$langcode][1][value]", 'No extraneous widget is displayed');

    // Update the entity.
    $value = mt_rand(1, 127);
    $edit = array("{$this->field_name}[$langcode][0][value]" => $value);
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertRaw(t('test_entity @id has been updated.', array('@id' => $id)), 'Entity was updated');
    $entity = field_test_entity_test_load($id);
    $this->assertEqual($entity->{$this->field_name}[$langcode][0]['value'], $value, 'Field value was updated');

    // Empty the field.
    $value = '';
    $edit = array("{$this->field_name}[$langcode][0][value]" => $value);
    $this->drupalPost('test-entity/manage/' . $id . '/edit', $edit, t('Save'));
    $this->assertRaw(t('test_entity @id has been updated.', array('@id' => $id)), 'Entity was updated');
    $entity = field_test_entity_test_load($id);
    $this->assertIdentical($entity->{$this->field_name}, array(), 'Field was emptied');

  }

  function testFieldFormSingleRequired() {
    $this->field = $this->field_single;
    $this->field_name = $this->field['field_name'];
    $this->instance['field_name'] = $this->field_name;
    $this->instance['required'] = TRUE;
    field_create_field($this->field);
    field_create_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    // Submit with missing required value.
    $edit = array();
    $this->drupalPost('test-entity/add/test-bundle', $edit, t('Save'));
    $this->assertRaw(t('!name field is required.', array('!name' => $this->instance['label'])), 'Required field with no value fails validation');

    // Create an entity
    $value = mt_rand(1, 127);
    $edit = array("{$this->field_name}[$langcode][0][value]" => $value);
    $this->drupalPost(NULL, $edit, t('Save'));
    preg_match('|test-entity/manage/(\d+)/edit|', $this->url, $match);
    $id = $match[1];
    $this->assertRaw(t('test_entity @id has been created.', array('@id' => $id)), 'Entity was created');
    $entity = field_test_entity_test_load($id);
    $this->assertEqual($entity->{$this->field_name}[$langcode][0]['value'], $value, 'Field value was saved');

    // Edit with missing required value.
    $value = '';
    $edit = array("{$this->field_name}[$langcode][0][value]" => $value);
    $this->drupalPost('test-entity/manage/' . $id . '/edit', $edit, t('Save'));
    $this->assertRaw(t('!name field is required.', array('!name' => $this->instance['label'])), 'Required field with no value fails validation');
  }

//  function testFieldFormMultiple() {
//    $this->field = $this->field_multiple;
//    $this->field_name = $this->field['field_name'];
//    $this->instance['field_name'] = $this->field_name;
//    field_create_field($this->field);
//    field_create_instance($this->instance);
//  }

  function testFieldFormUnlimited() {
    $this->field = $this->field_unlimited;
    $this->field_name = $this->field['field_name'];
    $this->instance['field_name'] = $this->field_name;
    field_create_field($this->field);
    field_create_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    // Display creation form -> 1 widget.
    $this->drupalGet('test-entity/add/test-bundle');
    $this->assertFieldByName("{$this->field_name}[$langcode][0][value]", '', 'Widget 1 is displayed');
    $this->assertNoField("{$this->field_name}[$langcode][1][value]", 'No extraneous widget is displayed');

    // Press 'add more' button -> 2 widgets.
    $this->drupalPost(NULL, array(), t('Add another item'));
    $this->assertFieldByName("{$this->field_name}[$langcode][0][value]", '', 'Widget 1 is displayed');
    $this->assertFieldByName("{$this->field_name}[$langcode][1][value]", '', 'New widget is displayed');
    $this->assertNoField("{$this->field_name}[$langcode][2][value]", 'No extraneous widget is displayed');
    // TODO : check that non-field inpurs are preserved ('title')...

    // Yet another time so that we can play with more values -> 3 widgets.
    $this->drupalPost(NULL, array(), t('Add another item'));

    // Prepare values and weights.
    $count = 3;
    $delta_range = $count - 1;
    $values = $weights = $pattern = $expected_values = $edit = array();
    for ($delta = 0; $delta <= $delta_range; $delta++) {
      // Assign unique random values and weights.
      do {
        $value = mt_rand(1, 127);
      } while (in_array($value, $values));
      do {
        $weight = mt_rand(-$delta_range, $delta_range);
      } while (in_array($weight, $weights));
      $edit["$this->field_name[$langcode][$delta][value]"] = $value;
      $edit["$this->field_name[$langcode][$delta][_weight]"] = $weight;
      // We'll need three slightly different formats to check the values.
      $values[$delta] = $value;
      $weights[$delta] = $weight;
      $field_values[$weight]['value'] = (string) $value;
      $pattern[$weight] = "<input [^>]*value=\"$value\" [^>]*";
    }

    // Press 'add more' button -> 4 widgets
    $this->drupalPost(NULL, $edit, t('Add another item'));
    for ($delta = 0; $delta <= $delta_range; $delta++) {
      $this->assertFieldByName("$this->field_name[$langcode][$delta][value]", $values[$delta], "Widget $delta is displayed and has the right value");
      $this->assertFieldByName("$this->field_name[$langcode][$delta][_weight]", $weights[$delta], "Widget $delta has the right weight");
    }
    ksort($pattern);
    $pattern = implode('.*', array_values($pattern));
    $this->assertPattern("|$pattern|s", 'Widgets are displayed in the correct order');
    $this->assertFieldByName("$this->field_name[$langcode][$delta][value]", '', "New widget is displayed");
    $this->assertFieldByName("$this->field_name[$langcode][$delta][_weight]", $delta, "New widget has the right weight");
    $this->assertNoField("$this->field_name[$langcode][" . ($delta + 1) . '][value]', 'No extraneous widget is displayed');

    // Submit the form and create the entity.
    $this->drupalPost(NULL, $edit, t('Save'));
    preg_match('|test-entity/manage/(\d+)/edit|', $this->url, $match);
    $id = $match[1];
    $this->assertRaw(t('test_entity @id has been created.', array('@id' => $id)), 'Entity was created');
    $entity = field_test_entity_test_load($id);
    ksort($field_values);
    $field_values = array_values($field_values);
    $this->assertIdentical($entity->{$this->field_name}[$langcode], $field_values, 'Field values were saved in the correct order');

    // Display edit form: check that the expected number of widgets is
    // displayed, with correct values change values, reorder, leave an empty
    // value in the middle.
    // Submit: check that the entity is updated with correct values
    // Re-submit: check that the field can be emptied.

    // Test with several multiple fields in a form
  }

  function testFieldFormJSAddMore() {
    $this->field = $this->field_unlimited;
    $this->field_name = $this->field['field_name'];
    $this->instance['field_name'] = $this->field_name;
    field_create_field($this->field);
    field_create_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    // Display creation form -> 1 widget.
    $this->drupalGet('test-entity/add/test-bundle');

    // Press 'add more' button a couple times -> 3 widgets.
    // drupalPostAJAX() will not work iteratively, so we add those through
    // non-JS submission.
    $this->drupalPost(NULL, array(), t('Add another item'));
    $this->drupalPost(NULL, array(), t('Add another item'));

    // Prepare values and weights.
    $count = 3;
    $delta_range = $count - 1;
    $values = $weights = $pattern = $expected_values = $edit = array();
    for ($delta = 0; $delta <= $delta_range; $delta++) {
      // Assign unique random values and weights.
      do {
        $value = mt_rand(1, 127);
      } while (in_array($value, $values));
      do {
        $weight = mt_rand(-$delta_range, $delta_range);
      } while (in_array($weight, $weights));
      $edit["$this->field_name[$langcode][$delta][value]"] = $value;
      $edit["$this->field_name[$langcode][$delta][_weight]"] = $weight;
      // We'll need three slightly different formats to check the values.
      $values[$delta] = $value;
      $weights[$delta] = $weight;
      $field_values[$weight]['value'] = (string) $value;
      $pattern[$weight] = "<input [^>]*value=\"$value\" [^>]*";
    }
    // Press 'add more' button through Ajax, and place the expected HTML result
    // as the tested content.
    $commands = $this->drupalPostAJAX(NULL, $edit, $this->field_name . '_add_more');
    $this->content = $commands[1]['data'];

    for ($delta = 0; $delta <= $delta_range; $delta++) {
      $this->assertFieldByName("$this->field_name[$langcode][$delta][value]", $values[$delta], "Widget $delta is displayed and has the right value");
      $this->assertFieldByName("$this->field_name[$langcode][$delta][_weight]", $weights[$delta], "Widget $delta has the right weight");
    }
    ksort($pattern);
    $pattern = implode('.*', array_values($pattern));
    $this->assertPattern("|$pattern|s", 'Widgets are displayed in the correct order');
    $this->assertFieldByName("$this->field_name[$langcode][$delta][value]", '', "New widget is displayed");
    $this->assertFieldByName("$this->field_name[$langcode][$delta][_weight]", $delta, "New widget has the right weight");
    $this->assertNoField("$this->field_name[$langcode][" . ($delta + 1) . '][value]', 'No extraneous widget is displayed');
  }

  /**
   * Tests widgets handling multiple values.
   */
  function testFieldFormMultipleWidget() {
    // Create a field with fixed cardinality and an instance using a multiple
    // widget.
    $this->field = $this->field_multiple;
    $this->field_name = $this->field['field_name'];
    $this->instance['field_name'] = $this->field_name;
    $this->instance['widget']['type'] = 'test_field_widget_multiple';
    field_create_field($this->field);
    field_create_instance($this->instance);
    $langcode = LANGUAGE_NONE;

    // Display creation form.
    $this->drupalGet('test-entity/add/test-bundle');
    $this->assertFieldByName("{$this->field_name}[$langcode]", '', t('Widget is displayed.'));

    // Create entity with three values.
    $edit = array("{$this->field_name}[$langcode]" => '1, 2, 3');
    $this->drupalPost(NULL, $edit, t('Save'));
    preg_match('|test-entity/manage/(\d+)/edit|', $this->url, $match);
    $id = $match[1];

    // Check that the values were saved.
    $entity_init = field_test_create_stub_entity($id);
    $this->assertFieldValues($entity_init, $this->field_name, $langcode, array(1, 2, 3));

    // Display the form, check that the values are correctly filled in.
    $this->drupalGet('test-entity/manage/' . $id . '/edit');
    $this->assertFieldByName("{$this->field_name}[$langcode]", '1, 2, 3', t('Widget is displayed.'));

    // Submit the form with more values than the field accepts.
    $edit = array("{$this->field_name}[$langcode]" => '1, 2, 3, 4, 5');
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertRaw('this field cannot hold more than 4 values', t('Form validation failed.'));
    // Check that the field values were not submitted.
    $this->assertFieldValues($entity_init, $this->field_name, $langcode, array(1, 2, 3));
  }

  /**
   * Tests fields with no 'edit' access.
   */
  function testFieldFormAccess() {
    // Create a "regular" field.
    $field = $this->field_single;
    $field_name = $field['field_name'];
    $instance = $this->instance;
    $instance['field_name'] = $field_name;
    field_create_field($field);
    field_create_instance($instance);

    // Create a field with no edit access - see field_test_field_access().
    $field_no_access = array(
      'field_name' => 'field_no_edit_access',
      'type' => 'test_field',
    );
    $field_name_no_access = $field_no_access['field_name'];
    $instance_no_access = array(
      'field_name' => $field_name_no_access,
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'default_value' => array(0 => array('value' => 99)),
    );
    field_create_field($field_no_access);
    field_create_instance($instance_no_access);

    $langcode = LANGUAGE_NONE;

    // Display creation form.
    $this->drupalGet('test-entity/add/test-bundle');
    $this->assertNoFieldByName("{$field_name_no_access}[$langcode][0][value]", '', t('Widget is not displayed if field access is denied.'));

    // Create entity.
    $edit = array("{$field_name}[$langcode][0][value]" => 1);
    $this->drupalPost(NULL, $edit, t('Save'));
    preg_match('|test-entity/manage/(\d+)/edit|', $this->url, $match);
    $id = $match[1];

    // Check that the default value was saved.
    $entity = field_test_entity_test_load($id);
    $this->assertEqual($entity->{$field_name_no_access}[$langcode][0]['value'], 99, t('Default value was saved for the field with no edit access.'));
    $this->assertEqual($entity->{$field_name}[$langcode][0]['value'], 1, t('Entered value vas saved for the field with edit access.'));

    // Create a new revision.
    $edit = array("{$field_name}[$langcode][0][value]" => 2, 'revision' => TRUE);
    $this->drupalPost('test-entity/manage/' . $id . '/edit', $edit, t('Save'));

    // Check that the new revision has the expected values.
    $entity = field_test_entity_test_load($id);
    $this->assertEqual($entity->{$field_name_no_access}[$langcode][0]['value'], 99, t('New revision has the expected value for the field with no edit access.'));
    $this->assertEqual($entity->{$field_name}[$langcode][0]['value'], 2, t('New revision has the expected value for the field with edit access.'));

    // Check that the revision is also saved in the revisions table.
    $entity = field_test_entity_test_load($id, $entity->ftvid);
    $this->assertEqual($entity->{$field_name_no_access}[$langcode][0]['value'], 99, t('New revision has the expected value for the field with no edit access.'));
    $this->assertEqual($entity->{$field_name}[$langcode][0]['value'], 2, t('New revision has the expected value for the field with edit access.'));
  }

  /**
   * Tests Field API form integration within a subform.
   */
  function testNestedFieldForm() {
    // Add two instances on the 'test_bundle'
    field_create_field($this->field_single);
    field_create_field($this->field_unlimited);
    $this->instance['field_name'] = 'field_single';
    $this->instance['label'] = 'Single field';
    field_create_instance($this->instance);
    $this->instance['field_name'] = 'field_unlimited';
    $this->instance['label'] = 'Unlimited field';
    field_create_instance($this->instance);

    // Create two entities.
    $entity_1 = field_test_create_stub_entity(1, 1);
    $entity_1->is_new = TRUE;
    $entity_1->field_single[LANGUAGE_NONE][] = array('value' => 0);
    $entity_1->field_unlimited[LANGUAGE_NONE][] = array('value' => 1);
    field_test_entity_save($entity_1);

    $entity_2 = field_test_create_stub_entity(2, 2);
    $entity_2->is_new = TRUE;
    $entity_2->field_single[LANGUAGE_NONE][] = array('value' => 10);
    $entity_2->field_unlimited[LANGUAGE_NONE][] = array('value' => 11);
    field_test_entity_save($entity_2);

    // Display the 'combined form'.
    $this->drupalGet('test-entity/nested/1/2');
    $this->assertFieldByName('field_single[und][0][value]', 0, t('Entity 1: field_single value appears correctly is the form.'));
    $this->assertFieldByName('field_unlimited[und][0][value]', 1, t('Entity 1: field_unlimited value 0 appears correctly is the form.'));
    $this->assertFieldByName('entity_2[field_single][und][0][value]', 10, t('Entity 2: field_single value appears correctly is the form.'));
    $this->assertFieldByName('entity_2[field_unlimited][und][0][value]', 11, t('Entity 2: field_unlimited value 0 appears correctly is the form.'));

    // Submit the form and check that the entities are updated accordingly.
    $edit = array(
      'field_single[und][0][value]' => 1,
      'field_unlimited[und][0][value]' => 2,
      'field_unlimited[und][1][value]' => 3,
      'entity_2[field_single][und][0][value]' => 11,
      'entity_2[field_unlimited][und][0][value]' => 12,
      'entity_2[field_unlimited][und][1][value]' => 13,
    );
    $this->drupalPost(NULL, $edit, t('Save'));
    field_cache_clear();
    $entity_1 = field_test_create_stub_entity(1);
    $entity_2 = field_test_create_stub_entity(2);
    $this->assertFieldValues($entity_1, 'field_single', LANGUAGE_NONE, array(1));
    $this->assertFieldValues($entity_1, 'field_unlimited', LANGUAGE_NONE, array(2, 3));
    $this->assertFieldValues($entity_2, 'field_single', LANGUAGE_NONE, array(11));
    $this->assertFieldValues($entity_2, 'field_unlimited', LANGUAGE_NONE, array(12, 13));

    // Submit invalid values and check that errors are reported on the
    // correct widgets.
    $edit = array(
      'field_unlimited[und][1][value]' => -1,
    );
    $this->drupalPost('test-entity/nested/1/2', $edit, t('Save'));
    $this->assertRaw(t('%label does not accept the value -1', array('%label' => 'Unlimited field')), t('Entity 1: the field validation error was reported.'));
    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', array(':id' => 'edit-field-unlimited-und-1-value'));
    $this->assertTrue($error_field, t('Entity 1: the error was flagged on the correct element.'));
    $edit = array(
      'entity_2[field_unlimited][und][1][value]' => -1,
    );
    $this->drupalPost('test-entity/nested/1/2', $edit, t('Save'));
    $this->assertRaw(t('%label does not accept the value -1', array('%label' => 'Unlimited field')), t('Entity 2: the field validation error was reported.'));
    $error_field = $this->xpath('//input[@id=:id and contains(@class, "error")]', array(':id' => 'edit-entity-2-field-unlimited-und-1-value'));
    $this->assertTrue($error_field, t('Entity 2: the error was flagged on the correct element.'));

    // Test that reordering works on both entities.
    $edit = array(
      'field_unlimited[und][0][_weight]' => 0,
      'field_unlimited[und][1][_weight]' => -1,
      'entity_2[field_unlimited][und][0][_weight]' => 0,
      'entity_2[field_unlimited][und][1][_weight]' => -1,
    );
    $this->drupalPost('test-entity/nested/1/2', $edit, t('Save'));
    field_cache_clear();
    $this->assertFieldValues($entity_1, 'field_unlimited', LANGUAGE_NONE, array(3, 2));
    $this->assertFieldValues($entity_2, 'field_unlimited', LANGUAGE_NONE, array(13, 12));

    // Test the 'add more' buttons. Only Ajax submission is tested, because
    // the two 'add more' buttons present in the form have the same #value,
    // which confuses drupalPost().
    // 'Add more' button in the first entity:
    $this->drupalGet('test-entity/nested/1/2');
    $this->drupalPostAJAX(NULL, array(), 'field_unlimited_add_more');
    $this->assertFieldByName('field_unlimited[und][0][value]', 3, t('Entity 1: field_unlimited value 0 appears correctly is the form.'));
    $this->assertFieldByName('field_unlimited[und][1][value]', 2, t('Entity 1: field_unlimited value 1 appears correctly is the form.'));
    $this->assertFieldByName('field_unlimited[und][2][value]', '', t('Entity 1: field_unlimited value 2 appears correctly is the form.'));
    $this->assertFieldByName('field_unlimited[und][3][value]', '', t('Entity 1: an empty widget was added for field_unlimited value 3.'));
    // 'Add more' button in the first entity (changing field values):
    $edit = array(
      'entity_2[field_unlimited][und][0][value]' => 13,
      'entity_2[field_unlimited][und][1][value]' => 14,
      'entity_2[field_unlimited][und][2][value]' => 15,
    );
    $this->drupalPostAJAX(NULL, $edit, 'entity_2_field_unlimited_add_more');
    $this->assertFieldByName('entity_2[field_unlimited][und][0][value]', 13, t('Entity 2: field_unlimited value 0 appears correctly is the form.'));
    $this->assertFieldByName('entity_2[field_unlimited][und][1][value]', 14, t('Entity 2: field_unlimited value 1 appears correctly is the form.'));
    $this->assertFieldByName('entity_2[field_unlimited][und][2][value]', 15, t('Entity 2: field_unlimited value 2 appears correctly is the form.'));
    $this->assertFieldByName('entity_2[field_unlimited][und][3][value]', '', t('Entity 2: an empty widget was added for field_unlimited value 3.'));
    // Save the form and check values are saved correclty.
    $this->drupalPost(NULL, array(), t('Save'));
    field_cache_clear();
    $this->assertFieldValues($entity_1, 'field_unlimited', LANGUAGE_NONE, array(3, 2));
    $this->assertFieldValues($entity_2, 'field_unlimited', LANGUAGE_NONE, array(13, 14, 15));
  }
}

class FieldDisplayAPITestCase extends FieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field Display API tests',
      'description' => 'Test the display API.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('field_test');

    // Create a field and instance.
    $this->field_name = 'test_field';
    $this->label = $this->randomName();
    $this->cardinality = 4;

    $this->field = array(
      'field_name' => $this->field_name,
      'type' => 'test_field',
      'cardinality' => $this->cardinality,
    );
    $this->instance = array(
      'field_name' => $this->field_name,
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'label' => $this->label,
      'display' => array(
        'default' => array(
          'type' => 'field_test_default',
          'settings' => array(
            'test_formatter_setting' => $this->randomName(),
          ),
        ),
        'teaser' => array(
          'type' => 'field_test_default',
          'settings' => array(
            'test_formatter_setting' => $this->randomName(),
          ),
        ),
      ),
    );
    field_create_field($this->field);
    field_create_instance($this->instance);

    // Create an entity with values.
    $this->values = $this->_generateTestFieldValues($this->cardinality);
    $this->entity = field_test_create_stub_entity();
    $this->is_new = TRUE;
    $this->entity->{$this->field_name}[LANGUAGE_NONE] = $this->values;
    field_test_entity_save($this->entity);
  }

  /**
   * Test the field_view_field() function.
   */
  function testFieldViewField() {
    // No display settings: check that default display settings are used.
    $output = field_view_field('test_entity', $this->entity, $this->field_name);
    $this->drupalSetContent(drupal_render($output));
    $settings = field_info_formatter_settings('field_test_default');
    $setting = $settings['test_formatter_setting'];
    $this->assertText($this->label, t('Label was displayed.'));
    foreach ($this->values as $delta => $value) {
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // Check that explicit display settings are used.
    $display = array(
      'label' => 'hidden',
      'type' => 'field_test_multiple',
      'settings' => array(
        'test_formatter_setting_multiple' => $this->randomName(),
        'alter' => TRUE,
      ),
    );
    $output = field_view_field('test_entity', $this->entity, $this->field_name, $display);
    $this->drupalSetContent(drupal_render($output));
    $setting = $display['settings']['test_formatter_setting_multiple'];
    $this->assertNoText($this->label, t('Label was not displayed.'));
    $this->assertText('field_test_field_attach_view_alter', t('Alter fired, display passed.'));
    $array = array();
    foreach ($this->values as $delta => $value) {
      $array[] = $delta . ':' . $value['value'];
    }
    $this->assertText($setting . '|' . implode('|', $array), t('Values were displayed with expected setting.'));

    // Check the prepare_view steps are invoked.
    $display = array(
      'label' => 'hidden',
      'type' => 'field_test_with_prepare_view',
      'settings' => array(
        'test_formatter_setting_additional' => $this->randomName(),
      ),
    );
    $output = field_view_field('test_entity', $this->entity, $this->field_name, $display);
    $view = drupal_render($output);
    $this->drupalSetContent($view);
    $setting = $display['settings']['test_formatter_setting_additional'];
    $this->assertNoText($this->label, t('Label was not displayed.'));
    $this->assertNoText('field_test_field_attach_view_alter', t('Alter not fired.'));
    foreach ($this->values as $delta => $value) {
      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // View mode: check that display settings specified in the instance are
    // used.
    $output = field_view_field('test_entity', $this->entity, $this->field_name, 'teaser');
    $this->drupalSetContent(drupal_render($output));
    $setting = $this->instance['display']['teaser']['settings']['test_formatter_setting'];
    $this->assertText($this->label, t('Label was displayed.'));
    foreach ($this->values as $delta => $value) {
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // Unknown view mode: check that display settings for 'default' view mode
    // are used.
    $output = field_view_field('test_entity', $this->entity, $this->field_name, 'unknown_view_mode');
    $this->drupalSetContent(drupal_render($output));
    $setting = $this->instance['display']['default']['settings']['test_formatter_setting'];
    $this->assertText($this->label, t('Label was displayed.'));
    foreach ($this->values as $delta => $value) {
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }
  }

  /**
   * Test the field_view_value() function.
   */
  function testFieldViewValue() {
    // No display settings: check that default display settings are used.
    $settings = field_info_formatter_settings('field_test_default');
    $setting = $settings['test_formatter_setting'];
    foreach ($this->values as $delta => $value) {
      $item = $this->entity->{$this->field_name}[LANGUAGE_NONE][$delta];
      $output = field_view_value('test_entity', $this->entity, $this->field_name, $item);
      $this->drupalSetContent(drupal_render($output));
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // Check that explicit display settings are used.
    $display = array(
      'type' => 'field_test_multiple',
      'settings' => array(
        'test_formatter_setting_multiple' => $this->randomName(),
      ),
    );
    $setting = $display['settings']['test_formatter_setting_multiple'];
    $array = array();
    foreach ($this->values as $delta => $value) {
      $item = $this->entity->{$this->field_name}[LANGUAGE_NONE][$delta];
      $output = field_view_value('test_entity', $this->entity, $this->field_name, $item, $display);
      $this->drupalSetContent(drupal_render($output));
      $this->assertText($setting . '|0:' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // Check that prepare_view steps are invoked.
    $display = array(
      'type' => 'field_test_with_prepare_view',
      'settings' => array(
        'test_formatter_setting_additional' => $this->randomName(),
      ),
    );
    $setting = $display['settings']['test_formatter_setting_additional'];
    $array = array();
    foreach ($this->values as $delta => $value) {
      $item = $this->entity->{$this->field_name}[LANGUAGE_NONE][$delta];
      $output = field_view_value('test_entity', $this->entity, $this->field_name, $item, $display);
      $this->drupalSetContent(drupal_render($output));
      $this->assertText($setting . '|' . $value['value'] . '|' . ($value['value'] + 1), t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // View mode: check that display settings specified in the instance are
    // used.
    $setting = $this->instance['display']['teaser']['settings']['test_formatter_setting'];
    foreach ($this->values as $delta => $value) {
      $item = $this->entity->{$this->field_name}[LANGUAGE_NONE][$delta];
      $output = field_view_value('test_entity', $this->entity, $this->field_name, $item, 'teaser');
      $this->drupalSetContent(drupal_render($output));
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }

    // Unknown view mode: check that display settings for 'default' view mode
    // are used.
    $setting = $this->instance['display']['default']['settings']['test_formatter_setting'];
    foreach ($this->values as $delta => $value) {
      $item = $this->entity->{$this->field_name}[LANGUAGE_NONE][$delta];
      $output = field_view_value('test_entity', $this->entity, $this->field_name, $item, 'unknown_view_mode');
      $this->drupalSetContent(drupal_render($output));
      $this->assertText($setting . '|' . $value['value'], t('Value @delta was displayed with expected setting.', array('@delta' => $delta)));
    }
  }
}

class FieldCrudTestCase extends FieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field CRUD tests',
      'description' => 'Test field create, read, update, and delete.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    // field_update_field() tests use number.module
    parent::setUp('field_test', 'number');
  }

  // TODO : test creation with
  // - a full fledged $field structure, check that all the values are there
  // - a minimal $field structure, check all default values are set
  // defer actual $field comparison to a helper function, used for the two cases above

  /**
   * Test the creation of a field.
   */
  function testCreateField() {
    $field_definition = array(
      'field_name' => 'field_2',
      'type' => 'test_field',
    );
    field_test_memorize();
    $field_definition = field_create_field($field_definition);
    $mem = field_test_memorize();
    $this->assertIdentical($mem['field_test_field_create_field'][0][0], $field_definition, 'hook_field_create_field() called with correct arguments.');

    // Read the raw record from the {field_config_instance} table.
    $result = db_query('SELECT * FROM {field_config} WHERE field_name = :field_name', array(':field_name' => $field_definition['field_name']));
    $record = $result->fetchAssoc();
    $record['data'] = unserialize($record['data']);

    // Ensure that basic properties are preserved.
    $this->assertEqual($record['field_name'], $field_definition['field_name'], t('The field name is properly saved.'));
    $this->assertEqual($record['type'], $field_definition['type'], t('The field type is properly saved.'));

    // Ensure that cardinality defaults to 1.
    $this->assertEqual($record['cardinality'], 1, t('Cardinality defaults to 1.'));

    // Ensure that default settings are present.
    $field_type = field_info_field_types($field_definition['type']);
    $this->assertIdentical($record['data']['settings'], $field_type['settings'], t('Default field settings have been written.'));

    // Ensure that default storage was set.
    $this->assertEqual($record['storage_type'], variable_get('field_storage_default'), t('The field type is properly saved.'));

    // Guarantee that the name is unique.
    try {
      field_create_field($field_definition);
      $this->fail(t('Cannot create two fields with the same name.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create two fields with the same name.'));
    }

    // Check that field type is required.
    try {
      $field_definition = array(
        'field_name' => 'field_1',
      );
      field_create_field($field_definition);
      $this->fail(t('Cannot create a field with no type.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create a field with no type.'));
    }

    // Check that field name is required.
    try {
      $field_definition = array(
        'type' => 'test_field'
      );
      field_create_field($field_definition);
      $this->fail(t('Cannot create an unnamed field.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create an unnamed field.'));
    }

    // Check that field name must start with a letter or _.
    try {
      $field_definition = array(
        'field_name' => '2field_2',
        'type' => 'test_field',
      );
      field_create_field($field_definition);
      $this->fail(t('Cannot create a field with a name starting with a digit.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create a field with a name starting with a digit.'));
    }

    // Check that field name must only contain lowercase alphanumeric or _.
    try {
      $field_definition = array(
        'field_name' => 'field#_3',
        'type' => 'test_field',
      );
      field_create_field($field_definition);
      $this->fail(t('Cannot create a field with a name containing an illegal character.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create a field with a name containing an illegal character.'));
    }

    // Check that field name cannot be longer than 32 characters long.
    try {
      $field_definition = array(
        'field_name' => '_12345678901234567890123456789012',
        'type' => 'test_field',
      );
      field_create_field($field_definition);
      $this->fail(t('Cannot create a field with a name longer than 32 characters.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create a field with a name longer than 32 characters.'));
    }

    // Check that field name can not be an entity key.
    // "ftvid" is known as an entity key from the "test_entity" type.
    try {
      $field_definition = array(
        'type' => 'test_field',
        'field_name' => 'ftvid',
      );
      $field = field_create_field($field_definition);
      $this->fail(t('Cannot create a field bearing the name of an entity key.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create a field bearing the name of an entity key.'));
    }
  }

  /**
   * Test failure to create a field.
   */
  function testCreateFieldFail() {
    $field_name = 'duplicate';
    $field_definition = array('field_name' => $field_name, 'type' => 'test_field', 'storage' => array('type' => 'field_test_storage_failure'));
    $query = db_select('field_config')->condition('field_name', $field_name)->countQuery();

    // The field does not appear in field_config.
    $count = $query->execute()->fetchField();
    $this->assertEqual($count, 0, 'A field_config row for the field does not exist.');

    // Try to create the field.
    try {
      $field = field_create_field($field_definition);
      $this->assertTrue(FALSE, 'Field creation (correctly) fails.');
    }
    catch (Exception $e) {
      $this->assertTrue(TRUE, 'Field creation (correctly) fails.');
    }

    // The field does not appear in field_config.
    $count = $query->execute()->fetchField();
    $this->assertEqual($count, 0, 'A field_config row for the field does not exist.');
  }

  /**
   * Test reading back a field definition.
   */
  function testReadField() {
    $field_definition = array(
      'field_name' => 'field_1',
      'type' => 'test_field',
    );
    field_create_field($field_definition);

    // Read the field back.
    $field = field_read_field($field_definition['field_name']);
    $this->assertTrue($field_definition < $field, t('The field was properly read.'));
  }

  /**
   * Test creation of indexes on data column.
   */
  function testFieldIndexes() {
    // Check that indexes specified by the field type are used by default.
    $field_definition = array(
      'field_name' => 'field_1',
      'type' => 'test_field',
    );
    field_create_field($field_definition);
    $field = field_read_field($field_definition['field_name']);
    $expected_indexes = array('value' => array('value'));
    $this->assertEqual($field['indexes'], $expected_indexes, t('Field type indexes saved by default'));

    // Check that indexes specified by the field definition override the field
    // type indexes.
    $field_definition = array(
      'field_name' => 'field_2',
      'type' => 'test_field',
      'indexes' => array(
        'value' => array(),
      ),
    );
    field_create_field($field_definition);
    $field = field_read_field($field_definition['field_name']);
    $expected_indexes = array('value' => array());
    $this->assertEqual($field['indexes'], $expected_indexes, t('Field definition indexes override field type indexes'));

    // Check that indexes specified by the field definition add to the field
    // type indexes.
    $field_definition = array(
      'field_name' => 'field_3',
      'type' => 'test_field',
      'indexes' => array(
        'value_2' => array('value'),
      ),
    );
    field_create_field($field_definition);
    $field = field_read_field($field_definition['field_name']);
    $expected_indexes = array('value' => array('value'), 'value_2' => array('value'));
    $this->assertEqual($field['indexes'], $expected_indexes, t('Field definition indexes are merged with field type indexes'));
  }

  /**
   * Test the deletion of a field.
   */
  function testDeleteField() {
    // TODO: Also test deletion of the data stored in the field ?

    // Create two fields (so we can test that only one is deleted).
    $this->field = array('field_name' => 'field_1', 'type' => 'test_field');
    field_create_field($this->field);
    $this->another_field = array('field_name' => 'field_2', 'type' => 'test_field');
    field_create_field($this->another_field);

    // Create instances for each.
    $this->instance_definition = array(
      'field_name' => $this->field['field_name'],
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
      'widget' => array(
        'type' => 'test_field_widget',
      ),
    );
    field_create_instance($this->instance_definition);
    $this->another_instance_definition = $this->instance_definition;
    $this->another_instance_definition['field_name'] = $this->another_field['field_name'];
    field_create_instance($this->another_instance_definition);

    // Test that the first field is not deleted, and then delete it.
    $field = field_read_field($this->field['field_name'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($field) && empty($field['deleted']), t('A new field is not marked for deletion.'));
    field_delete_field($this->field['field_name']);

    // Make sure that the field is marked as deleted when it is specifically
    // loaded.
    $field = field_read_field($this->field['field_name'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($field['deleted']), t('A deleted field is marked for deletion.'));

    // Make sure that this field's instance is marked as deleted when it is
    // specifically loaded.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($instance['deleted']), t('An instance for a deleted field is marked for deletion.'));

    // Try to load the field normally and make sure it does not show up.
    $field = field_read_field($this->field['field_name']);
    $this->assertTrue(empty($field), t('A deleted field is not loaded by default.'));

    // Try to load the instance normally and make sure it does not show up.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertTrue(empty($instance), t('An instance for a deleted field is not loaded by default.'));

    // Make sure the other field (and its field instance) are not deleted.
    $another_field = field_read_field($this->another_field['field_name']);
    $this->assertTrue(!empty($another_field) && empty($another_field['deleted']), t('A non-deleted field is not marked for deletion.'));
    $another_instance = field_read_instance('test_entity', $this->another_instance_definition['field_name'], $this->another_instance_definition['bundle']);
    $this->assertTrue(!empty($another_instance) && empty($another_instance['deleted']), t('An instance of a non-deleted field is not marked for deletion.'));

    // Try to create a new field the same name as a deleted field and
    // write data into it.
    field_create_field($this->field);
    field_create_instance($this->instance_definition);
    $field = field_read_field($this->field['field_name']);
    $this->assertTrue(!empty($field) && empty($field['deleted']), t('A new field with a previously used name is created.'));
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertTrue(!empty($instance) && empty($instance['deleted']), t('A new instance for a previously used field name is created.'));

    // Save an entity with data for the field
    $entity = field_test_create_stub_entity(0, 0, $instance['bundle']);
    $langcode = LANGUAGE_NONE;
    $values[0]['value'] = mt_rand(1, 127);
    $entity->{$field['field_name']}[$langcode] = $values;
    $entity_type = 'test_entity';
    field_attach_insert('test_entity', $entity);

    // Verify the field is present on load
    $entity = field_test_create_stub_entity(0, 0, $this->instance_definition['bundle']);
    field_attach_load($entity_type, array(0 => $entity));
    $this->assertIdentical(count($entity->{$field['field_name']}[$langcode]), count($values), "Data in previously deleted field saves and loads correctly");
    foreach ($values as $delta => $value) {
      $this->assertEqual($entity->{$field['field_name']}[$langcode][$delta]['value'], $values[$delta]['value'], "Data in previously deleted field saves and loads correctly");
    }
  }

  function testUpdateNonExistentField() {
    $test_field = array('field_name' => 'does_not_exist', 'type' => 'number_decimal');
    try {
      field_update_field($test_field);
      $this->fail(t('Cannot update a field that does not exist.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot update a field that does not exist.'));
    }
  }

  function testUpdateFieldType() {
    $field = array('field_name' => 'field_type', 'type' => 'number_decimal');
    $field = field_create_field($field);

    $test_field = array('field_name' => 'field_type', 'type' => 'number_integer');
    try {
      field_update_field($test_field);
      $this->fail(t('Cannot update a field to a different type.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot update a field to a different type.'));
    }
  }

  /**
   * Test updating a field.
   */
  function testUpdateField() {
    // Create a field with a defined cardinality, so that we can ensure it's
    // respected. Since cardinality enforcement is consistent across database
    // systems, it makes a good test case.
    $cardinality = 4;
    $field_definition = array(
      'field_name' => 'field_update',
      'type' => 'test_field',
      'cardinality' => $cardinality,
    );
    $field_definition = field_create_field($field_definition);
    $instance = array(
      'field_name' => 'field_update',
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
    );
    $instance = field_create_instance($instance);

    do {
      // We need a unique ID for our entity. $cardinality will do.
      $id = $cardinality;
      $entity = field_test_create_stub_entity($id, $id, $instance['bundle']);
      // Fill in the entity with more values than $cardinality.
      for ($i = 0; $i < 20; $i++) {
        $entity->field_update[LANGUAGE_NONE][$i]['value'] = $i;
      }
      // Save the entity.
      field_attach_insert('test_entity', $entity);
      // Load back and assert there are $cardinality number of values.
      $entity = field_test_create_stub_entity($id, $id, $instance['bundle']);
      field_attach_load('test_entity', array($id => $entity));
      $this->assertEqual(count($entity->field_update[LANGUAGE_NONE]), $field_definition['cardinality'], 'Cardinality is kept');
      // Now check the values themselves.
      for ($delta = 0; $delta < $cardinality; $delta++) {
        $this->assertEqual($entity->field_update[LANGUAGE_NONE][$delta]['value'], $delta, 'Value is kept');
      }
      // Increase $cardinality and set the field cardinality to the new value.
      $field_definition['cardinality'] = ++$cardinality;
      field_update_field($field_definition);
    } while ($cardinality < 6);
  }

  /**
   * Test field type modules forbidding an update.
   */
  function testUpdateFieldForbid() {
    $field = array('field_name' => 'forbidden', 'type' => 'test_field', 'settings' => array('changeable' => 0, 'unchangeable' => 0));
    $field = field_create_field($field);
    $field['settings']['changeable']++;
    try {
      field_update_field($field);
      $this->pass(t("A changeable setting can be updated."));
    }
    catch (FieldException $e) {
      $this->fail(t("An unchangeable setting cannot be updated."));
    }
    $field['settings']['unchangeable']++;
    try {
      field_update_field($field);
      $this->fail(t("An unchangeable setting can be updated."));
    }
    catch (FieldException $e) {
      $this->pass(t("An unchangeable setting cannot be updated."));
    }
  }

  /**
   * Test that fields are properly marked active or inactive.
   */
  function testActive() {
    $field_definition = array(
      'field_name' => 'field_1',
      'type' => 'test_field',
      // For this test, we need a storage backend provided by a different
      // module than field_test.module.
      'storage' => array(
        'type' => 'field_sql_storage',
      ),
    );
    field_create_field($field_definition);

    // Test disabling and enabling:
    // - the field type module,
    // - the storage module,
    // - both.
    $this->_testActiveHelper($field_definition, array('field_test'));
    $this->_testActiveHelper($field_definition, array('field_sql_storage'));
    $this->_testActiveHelper($field_definition, array('field_test', 'field_sql_storage'));
  }

  /**
   * Helper function for testActive().
   *
   * Test dependency between a field and a set of modules.
   *
   * @param $field_definition
   *   A field definition.
   * @param $modules
   *   An aray of module names. The field will be tested to be inactive as long
   *   as any of those modules is disabled.
   */
  function _testActiveHelper($field_definition, $modules) {
    $field_name = $field_definition['field_name'];

    // Read the field.
    $field = field_read_field($field_name);
    $this->assertTrue($field_definition <= $field, t('The field was properly read.'));

    module_disable($modules, FALSE);
    drupal_flush_all_caches();

    $fields = field_read_fields(array('field_name' => $field_name), array('include_inactive' => TRUE));
    $this->assertTrue(isset($fields[$field_name]) && $field_definition < $field, t('The field is properly read when explicitly fetching inactive fields.'));

    // Re-enable modules one by one, and check that the field is still inactive
    // while some modules remain disabled.
    while ($modules) {
      $field = field_read_field($field_name);
      $this->assertTrue(empty($field), t('%modules disabled. The field is marked inactive.', array('%modules' => implode(', ', $modules))));

      $module = array_shift($modules);
      module_enable(array($module), FALSE);
      drupal_flush_all_caches();
    }

    // Check that the field is active again after all modules have been
    // enabled.
    $field = field_read_field($field_name);
    $this->assertTrue($field_definition <= $field, t('The field was was marked active.'));
  }
}

class FieldInstanceCrudTestCase extends FieldTestCase {
  protected $field;

  public static function getInfo() {
    return array(
      'name' => 'Field instance CRUD tests',
      'description' => 'Create field entities by attaching fields to entities.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('field_test');

    $this->field = array(
      'field_name' => drupal_strtolower($this->randomName()),
      'type' => 'test_field',
    );
    field_create_field($this->field);
    $this->instance_definition = array(
      'field_name' => $this->field['field_name'],
      'entity_type' => 'test_entity',
      'bundle' => 'test_bundle',
    );
  }

  // TODO : test creation with
  // - a full fledged $instance structure, check that all the values are there
  // - a minimal $instance structure, check all default values are set
  // defer actual $instance comparison to a helper function, used for the two cases above,
  // and for testUpdateFieldInstance

  /**
   * Test the creation of a field instance.
   */
  function testCreateFieldInstance() {
    field_create_instance($this->instance_definition);

    // Read the raw record from the {field_config_instance} table.
    $result = db_query('SELECT * FROM {field_config_instance} WHERE field_name = :field_name AND bundle = :bundle', array(':field_name' => $this->instance_definition['field_name'], ':bundle' => $this->instance_definition['bundle']));
    $record = $result->fetchAssoc();
    $record['data'] = unserialize($record['data']);

    $field_type = field_info_field_types($this->field['type']);
    $widget_type = field_info_widget_types($field_type['default_widget']);
    $formatter_type = field_info_formatter_types($field_type['default_formatter']);

    // Check that default values are set.
    $this->assertIdentical($record['data']['required'], FALSE, t('Required defaults to false.'));
    $this->assertIdentical($record['data']['label'], $this->instance_definition['field_name'], t('Label defaults to field name.'));
    $this->assertIdentical($record['data']['description'], '', t('Description defaults to empty string.'));
    $this->assertIdentical($record['data']['widget']['type'], $field_type['default_widget'], t('Default widget has been written.'));
    $this->assertTrue(isset($record['data']['display']['default']), t('Display for "full" view_mode has been written.'));
    $this->assertIdentical($record['data']['display']['default']['type'], $field_type['default_formatter'], t('Default formatter for "full" view_mode has been written.'));

    // Check that default settings are set.
    $this->assertIdentical($record['data']['settings'], $field_type['instance_settings'] , t('Default instance settings have been written.'));
    $this->assertIdentical($record['data']['widget']['settings'], $widget_type['settings'] , t('Default widget settings have been written.'));
    $this->assertIdentical($record['data']['display']['default']['settings'], $formatter_type['settings'], t('Default formatter settings for "full" view_mode have been written.'));

    // Guarantee that the field/bundle combination is unique.
    try {
      field_create_instance($this->instance_definition);
      $this->fail(t('Cannot create two instances with the same field / bundle combination.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create two instances with the same field / bundle combination.'));
    }

    // Check that the specified field exists.
    try {
      $this->instance_definition['field_name'] = $this->randomName();
      field_create_instance($this->instance_definition);
      $this->fail(t('Cannot create an instance of a non-existing field.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create an instance of a non-existing field.'));
    }

    // Create a field restricted to a specific entity type.
    $field_restricted = array(
      'field_name' => drupal_strtolower($this->randomName()),
      'type' => 'test_field',
      'entity_types' => array('test_cacheable_entity'),
    );
    field_create_field($field_restricted);

    // Check that an instance can be added to an entity type allowed
    // by the field.
    try {
      $instance = $this->instance_definition;
      $instance['field_name'] = $field_restricted['field_name'];
      $instance['entity_type'] = 'test_cacheable_entity';
      field_create_instance($instance);
      $this->pass(t('Can create an instance on an entity type allowed by the field.'));
    }
    catch (FieldException $e) {
      $this->fail(t('Can create an instance on an entity type allowed by the field.'));
    }

    // Check that an instance cannot be added to an entity type
    // forbidden by the field.
    try {
      $instance = $this->instance_definition;
      $instance['field_name'] = $field_restricted['field_name'];
      field_create_instance($instance);
      $this->fail(t('Cannot create an instance on an entity type forbidden by the field.'));
    }
    catch (FieldException $e) {
      $this->pass(t('Cannot create an instance on an entity type forbidden by the field.'));
    }

    // TODO: test other failures.
  }

  /**
   * Test reading back an instance definition.
   */
  function testReadFieldInstance() {
    field_create_instance($this->instance_definition);

    // Read the instance back.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertTrue($this->instance_definition < $instance, t('The field was properly read.'));
  }

  /**
   * Test the update of a field instance.
   */
  function testUpdateFieldInstance() {
    field_create_instance($this->instance_definition);
    $field_type = field_info_field_types($this->field['type']);

    // Check that basic changes are saved.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $instance['required'] = !$instance['required'];
    $instance['label'] = $this->randomName();
    $instance['description'] = $this->randomName();
    $instance['settings']['test_instance_setting'] = $this->randomName();
    $instance['widget']['settings']['test_widget_setting'] =$this->randomName();
    $instance['widget']['weight']++;
    $instance['display']['default']['settings']['test_formatter_setting'] = $this->randomName();
    $instance['display']['default']['weight']++;
    field_update_instance($instance);

    $instance_new = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertEqual($instance['required'], $instance_new['required'], t('"required" change is saved'));
    $this->assertEqual($instance['label'], $instance_new['label'], t('"label" change is saved'));
    $this->assertEqual($instance['description'], $instance_new['description'], t('"description" change is saved'));
    $this->assertEqual($instance['widget']['settings']['test_widget_setting'], $instance_new['widget']['settings']['test_widget_setting'], t('Widget setting change is saved'));
    $this->assertEqual($instance['widget']['weight'], $instance_new['widget']['weight'], t('Widget weight change is saved'));
    $this->assertEqual($instance['display']['default']['settings']['test_formatter_setting'], $instance_new['display']['default']['settings']['test_formatter_setting'], t('Formatter setting change is saved'));
    $this->assertEqual($instance['display']['default']['weight'], $instance_new['display']['default']['weight'], t('Widget weight change is saved'));

    // Check that changing widget and formatter types updates the default settings.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $instance['widget']['type'] = 'test_field_widget_multiple';
    $instance['display']['default']['type'] = 'field_test_multiple';
    field_update_instance($instance);

    $instance_new = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertEqual($instance['widget']['type'], $instance_new['widget']['type'] , t('Widget type change is saved.'));
    $settings = field_info_widget_settings($instance_new['widget']['type']);
    $this->assertIdentical($settings, array_intersect_key($instance_new['widget']['settings'], $settings) , t('Widget type change updates default settings.'));
    $this->assertEqual($instance['display']['default']['type'], $instance_new['display']['default']['type'] , t('Formatter type change is saved.'));
    $info = field_info_formatter_types($instance_new['display']['default']['type']);
    $settings = $info['settings'];
    $this->assertIdentical($settings, array_intersect_key($instance_new['display']['default']['settings'], $settings) , t('Changing formatter type updates default settings.'));

    // Check that adding a new view mode is saved and gets default settings.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $instance['display']['teaser'] = array();
    field_update_instance($instance);

    $instance_new = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertTrue(isset($instance_new['display']['teaser']), t('Display for the new view_mode has been written.'));
    $this->assertIdentical($instance_new['display']['teaser']['type'], $field_type['default_formatter'], t('Default formatter for the new view_mode has been written.'));
    $info = field_info_formatter_types($instance_new['display']['teaser']['type']);
    $settings = $info['settings'];
    $this->assertIdentical($settings, $instance_new['display']['teaser']['settings'] , t('Default formatter settings for the new view_mode have been written.'));

    // TODO: test failures.
  }

  /**
   * Test the deletion of a field instance.
   */
  function testDeleteFieldInstance() {
    // TODO: Test deletion of the data stored in the field also.
    // Need to check that data for a 'deleted' field / instance doesn't get loaded
    // Need to check data marked deleted is cleaned on cron (not implemented yet...)

    // Create two instances for the same field so we can test that only one
    // is deleted.
    field_create_instance($this->instance_definition);
    $this->another_instance_definition = $this->instance_definition;
    $this->another_instance_definition['bundle'] .= '_another_bundle';
    $instance = field_create_instance($this->another_instance_definition);

    // Test that the first instance is not deleted, and then delete it.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($instance) && empty($instance['deleted']), t('A new field instance is not marked for deletion.'));
    field_delete_instance($instance);

    // Make sure the instance is marked as deleted when the instance is
    // specifically loaded.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($instance['deleted']), t('A deleted field instance is marked for deletion.'));

    // Try to load the instance normally and make sure it does not show up.
    $instance = field_read_instance('test_entity', $this->instance_definition['field_name'], $this->instance_definition['bundle']);
    $this->assertTrue(empty($instance), t('A deleted field instance is not loaded by default.'));

    // Make sure the other field instance is not deleted.
    $another_instance = field_read_instance('test_entity', $this->another_instance_definition['field_name'], $this->another_instance_definition['bundle']);
    $this->assertTrue(!empty($another_instance) && empty($another_instance['deleted']), t('A non-deleted field instance is not marked for deletion.'));

    // Make sure the field is deleted when its last instance is deleted.
    field_delete_instance($another_instance);
    $field = field_read_field($another_instance['field_name'], array('include_deleted' => TRUE));
    $this->assertTrue(!empty($field['deleted']), t('A deleted field is marked for deletion after all its instances have been marked for deletion.'));
  }
}

/**
 * Unit test class for the multilanguage fields logic.
 *
 * The following tests will check the multilanguage logic of _field_invoke() and
 * that only the correct values are returned by field_available_languages().
 */
class FieldTranslationsTestCase extends FieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Field translations tests',
      'description' => 'Test multilanguage fields logic.',
      'group' => 'Field API',
    );
  }

  function setUp() {
    parent::setUp('locale', 'field_test');

    $this->field_name = drupal_strtolower($this->randomName() . '_field_name');

    $this->entity_type = 'test_entity';

    $field = array(
      'field_name' => $this->field_name,
      'type' => 'test_field',
      'cardinality' => 4,
      'translatable' => TRUE,
    );
    field_create_field($field);
    $this->field = field_read_field($this->field_name);

    $instance = array(
      'field_name' => $this->field_name,
      'entity_type' => $this->entity_type,
      'bundle' => 'test_bundle',
    );
    field_create_instance($instance);
    $this->instance = field_read_instance('test_entity', $this->field_name, 'test_bundle');

    require_once DRUPAL_ROOT . '/includes/locale.inc';
    for ($i = 0; $i < 3; ++$i) {
      locale_add_language('l' . $i, $this->randomString(), $this->randomString());
    }
  }

  /**
   * Ensures that only valid values are returned by field_available_languages().
   */
  function testFieldAvailableLanguages() {
    // Test 'translatable' fieldable info.
    field_test_entity_info_translatable('test_entity', FALSE);
    $field = $this->field;
    $field['field_name'] .= '_untranslatable';

    // Enable field translations for the entity.
    field_test_entity_info_translatable('test_entity', TRUE);

    // Test hook_field_languages() invocation on a translatable field.
    variable_set('field_test_field_available_languages_alter', TRUE);
    $enabled_languages = field_content_languages();
    $available_languages = field_available_languages($this->entity_type, $this->field);
    foreach ($available_languages as $delta => $langcode) {
      if ($langcode != 'xx' && $langcode != 'en') {
        $this->assertTrue(in_array($langcode, $enabled_languages), t('%language is an enabled language.', array('%language' => $langcode)));
      }
    }
    $this->assertTrue(in_array('xx', $available_languages), t('%language was made available.', array('%language' => 'xx')));
    $this->assertFalse(in_array('en', $available_languages), t('%language was made unavailable.', array('%language' => 'en')));

    // Test field_available_languages() behavior for untranslatable fields.
    $this->field['translatable'] = FALSE;
    field_update_field($this->field);
    $available_languages = field_available_languages($this->entity_type, $this->field);
    $this->assertTrue(count($available_languages) == 1 && $available_languages[0] === LANGUAGE_NONE, t('For untranslatable fields only LANGUAGE_NONE is available.'));
  }

  /**
   * Test the multilanguage logic of _field_invoke().
   */
  function testFieldInvoke() {
    // Enable field translations for the entity.
    field_test_entity_info_translatable('test_entity', TRUE);

    $entity_type = 'test_entity';
    $entity = field_test_create_stub_entity(0, 0, $this->instance['bundle']);

    // Populate some extra languages to check if _field_invoke() correctly uses
    // the result of field_available_languages().
    $values = array();
    $extra_languages = mt_rand(1, 4);
    $languages = $available_languages = field_available_languages($this->entity_type, $this->field);
    for ($i = 0; $i < $extra_languages; ++$i) {
      $languages[] = $this->randomName(2);
    }

    // For each given language provide some random values.
    foreach ($languages as $langcode) {
      for ($delta = 0; $delta < $this->field['cardinality']; $delta++) {
        $values[$langcode][$delta]['value'] = mt_rand(1, 127);
      }
    }
    $entity->{$this->field_name} = $values;

    $results = _field_invoke('test_op', $entity_type, $entity);
    foreach ($results as $langcode => $result) {
      $hash = hash('sha256', serialize(array($entity_type, $entity, $this->field_name, $langcode, $values[$langcode])));
      // Check whether the parameters passed to _field_invoke() were correctly