class FieldAttachStorageTestCase

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]), $this->field['cardinality'], 'Current revision: expected number of values');
        for ($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'], format_string('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', format_string('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'], format_string('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'], format_string('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', format_string('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], format_string('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', format_string('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]], format_string('Entity %index: expected value was found.', array(
            '%index' => 1,
        )));
        $this->assertEqual($entity->{$field_names[1]}[$langcode][0]['additional_key'], 'additional_value', format_string('Entity %index: extra information was found', array(
            '%index' => 1,
        )));
        $this->assert(!isset($entity->{$field_names[2]}), format_string('Entity %index: field %field_name is not loaded.', array(
            '%index' => 2,
            '%field_name' => $field_names[2],
        )));
        $this->assert(!isset($entity->{$field_names[3]}), format_string('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], format_string('%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']), '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]), 'Moon is available in the instance array.');
        $this->assertTrue(array_key_exists('mars', $details[FIELD_LOAD_REVISION]), '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, format_string('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, format_string('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}), '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}), '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, '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, '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}), '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, '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}), '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]), '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, 'Insert: missing field results in default value saved');
    }
    
    /**
     * Test field_has_data().
     */
    function testFieldHasData() {
        $entity_type = 'test_entity';
        $langcode = LANGUAGE_NONE;
        $field_name = 'field_1';
        $field = array(
            'field_name' => $field_name,
            'type' => 'test_field',
        );
        $field = field_create_field($field);
        $this->assertFalse(field_has_data($field), "No data should be detected.");
        $instance = array(
            'field_name' => $field_name,
            'entity_type' => 'test_entity',
            'bundle' => 'test_bundle',
        );
        $instance = field_create_instance($instance);
        $table = _field_sql_storage_tablename($field);
        $revision_table = _field_sql_storage_revision_tablename($field);
        $columns = array(
            'entity_type',
            'entity_id',
            'revision_id',
            'delta',
            'language',
            $field_name . '_value',
        );
        $eid = 0;
        // Insert values into the field revision table.
        $query = db_insert($revision_table)->fields($columns);
        $query->values(array(
            $entity_type,
            $eid,
            0,
            0,
            $langcode,
            1,
        ));
        $query->execute();
        $this->assertTrue(field_has_data($field), "Revision data only should be detected.");
        $field_name = 'field_2';
        $field = array(
            'field_name' => $field_name,
            'type' => 'test_field',
        );
        $field = field_create_field($field);
        $this->assertFalse(field_has_data($field), "No data should be detected.");
        $instance = array(
            'field_name' => $field_name,
            'entity_type' => 'test_entity',
            'bundle' => 'test_bundle',
        );
        $instance = field_create_instance($instance);
        $table = _field_sql_storage_tablename($field);
        $revision_table = _field_sql_storage_revision_tablename($field);
        $columns = array(
            'entity_type',
            'entity_id',
            'revision_id',
            'delta',
            'language',
            $field_name . '_value',
        );
        $eid = 1;
        // Insert values into the field table.
        $query = db_insert($table)->fields($columns);
        $query->values(array(
            $entity_type,
            $eid,
            0,
            0,
            $langcode,
            1,
        ));
        $query->execute();
        $this->assertTrue(field_has_data($field), "Values only in field table should be detected.");
    }
    
    /**
     * 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(), '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");
    }

}