source: sipes/modules_contrib/cck/tests/content.crud.test @ a8b1f3f

<?php

// TODO:
// - Test search indexing
// - Test values reordering with preview and failed validation

/**
 * Base class for CCK CRUD tests.
 * Defines many helper functions useful for writing CCK CRUD tests.
 */
class ContentCrudTestCase extends DrupalWebTestCase {
  var $enabled_schema = FALSE;
  var $content_types  = array();
  var $nodes          = array();
  var $last_field     = NULL;
  var $next_field_n   = 1;

  /**
   * Enable CCK, Text, and Schema modules.
   */
  function setUp() {
    $args = func_get_args();
    $modules = array_merge(array('content_test', 'content', 'schema', 'text'), $args);
    call_user_func_array(array('parent','setUp'), $modules);
    module_load_include('inc', 'content', 'includes/content.crud');
  }

  // Database schema related helper functions

  /**
   * Checks that the database itself and the reported database schema match the
   * expected columns for the given tables.
   * @param $tables An array containing the key 'per_field' and/or the key 'per_type'.
   *  These keys should have array values with table names as the keys (without the 'content_' / 'content_type_' prefix)
   *  These keys should have either NULL value to indicate the table should be absent, or
   *  array values containing column names. The column names can themselves be arrays, in
   *  which case the contents of the array are treated as column names and prefixed with
   *  the array key.
   *
   * For example, if called with the following as an argument:
   * array(
   *   'per_field' => array(
   *     'st_f1' => array('delta', 'field_f1' => array('value, 'format')),
   *     'st_f2' => NULL,    // no content_field_f2 table
   *   ),
   *   'per_type' => array(
   *     'st_t1' => array('field_f2' => array('value'), 'field_f3' => array('value', 'format')),
   *     'st_t2' => array(), // only 'nid' and 'vid' columns
   *     'st_t3' => NULL,    // no content_type_t3 table
   *   ),
   * )
   * Then the database and schema will be checked to ensure that:
   *   content_st_f1 table contains fields nid, vid, delta, field_f1_value, field_f1_format
   *   content_st_f2 table is absent
   *   content_type_st_t1 table contains fields nid, vid, field_f2_value, field_f3_value, field_f3_format
   *   content_type_st_t2 table contains fields nid, vid
   *   content_type_st_t3 table is absent
   */
  function assertSchemaMatchesTables($tables) {
    $groups = array('per_field' => 'content_', 'per_type' => 'content_type_');

    foreach ($groups as $group => $table_prefix) {
      if (isset($tables[$group])) {
        foreach ($tables[$group] as $entity => $columns) {
          if (isset($columns)) {
            $db_columns = array('nid', 'vid');
            foreach ($columns as $prefix => $items) {
              if (is_array($items)) {
                foreach ($items as $item) {
                  $db_columns[] = $prefix .'_'. $item;
                }
              }
              else {
                $db_columns[] = $items;
              }
            }
            $this->_assertSchemaMatches($table_prefix . $entity, $db_columns);
          }
          else {
            $this->_assertTableNotExists($table_prefix . $entity);
          }
        }
      }
    }
  }

  /**
   * Helper function for assertSchemaMatchesTables
   * Checks that the given database table does NOT exist
   * @param $table Name of the table to check
   */
  function _assertTableNotExists($table) {
    $this->assertFalse(db_table_exists($table), t('Table !table is absent', array('!table' => $table)));
  }

  /**
   * Helper function for assertSchemaMatchesTables
   * Checks that the database and schema for the given table contain only the expected fields.
   * @param $table Name of the table to check
   * @param $columns Array of column names
   */
  function _assertSchemaMatches($table, $columns) {
    // First test: check the expected structure matches the stored schema.
    $schema = drupal_get_schema($table, TRUE);
    $mismatches = array();
    if ($schema === FALSE) {
      $mismatches[] = t('table does not exist');
    }
    else {
      $fields = $schema['fields'];
      foreach ($columns as $field) {
        if (!isset($fields[$field])) {
          $mismatches[] = t('field !field is missing from table', array('!field' => $field));
        }
      }
      $columns_reverse = array_flip($columns);
      foreach ($fields as $name => $info) {
        if(!isset($columns_reverse[$name])) {
          $mismatches[] = t('table contains unexpected field !field', array('!field' => $name));
        }
      }
    }
    $this->assertEqual(count($mismatches), 0, t('Table !table matches schema: !details',
      array('!table' => $table, '!details' => implode($mismatches, ', '))));

    // Second test: check the schema matches the actual db structure.
    // This is the part that relies on schema.module.
    if (!$this->enabled_schema) {
      $this->enabled_schema = module_exists('schema');
    }
    if ($this->enabled_schema) {
      // Clunky workaround for http://drupal.org/node/215198
      $prefixed_table = db_prefix_tables('{'. $table .'}');
      $inspect = schema_invoke('inspect', $prefixed_table);
      $inspect = isset($inspect[$table]) ? $inspect[$table] : NULL;
      $compare = schema_compare_table($schema, $inspect);
      if ($compare['status'] == 'missing') {
        $compare['reasons'] = array(t('table does not exist'));
      }
    }
    else {
      $compare = array('status' => 'unknown', 'reasons' => array(t('cannot enable schema module')));
    }
    $this->assertEqual($compare['status'], 'same', t('Table schema for !table matches database: !details',
      array('!table' => $table, '!details' => implode($compare['reasons'], ', '))));
  }

  // Node data helper functions

  /**
   * Helper function for assertNodeSaveValues. Recursively checks that
   * all the keys of a table are present in a second and have the same value.
   */
  function _compareArrayForChanges($fields, $data, $message, $prefix = '') {
    foreach ($fields as $key => $value) {
      $newprefix = ($prefix == '') ? $key : $prefix .']['. $key;
      if (is_array($value)) {
        $compare_to = isset($data[$key]) ? $data[$key] : array();
        $this->_compareArrayForChanges($value, $compare_to, $message, $newprefix);
      }
      else {
        $this->assertEqual($value, $data[$key], t($message, array('!key' => $newprefix)));
      }
    }
  }

  /**
   * Checks that after a node is saved using node_save, the values to be saved
   * match up with the output from node_load.
   * @param $node Either a node object, or the index of an acquired node
   * @param $values Array of values to be merged with the node and passed to node_save
   * @return The values array
   */
  function assertNodeSaveValues($node, $values) {
    if (is_numeric($node) && isset($this->nodes[$node])) {
      $node = $this->nodes[$node];
    }
    $node = $values + (array)$node;
    $node = (object)$node;
    node_save($node);
    $this->assertNodeValues($node, $values);
    return $values;
  }

  /**
   * Checks that the output from node_load matches the expected values.
   * @param $node Either a node object, or the index of an acquired node (only the nid field is used)
   * @param $values Array of values to check against node_load. The node object must contain the keys in the array,
   *  and the values must be equal, but the node object may also contain other keys.
   */
  function assertNodeValues($node, $values) {
    if (is_numeric($node) && isset($this->nodes[$node])) {
      $node = $this->nodes[$node];
    }
    $node = node_load($node->nid, NULL, TRUE);
    $this->_compareArrayForChanges($values, (array)$node, 'Node data [!key] is correct');
  }

  /**
   * Checks that the output from node_load is missing certain fields
   * @param $node Either a node object, or the index of an acquired node (only the nid field is used)
   * @param $fields Array containing a list of field names
   */
  function assertNodeMissingFields($node, $fields) {
    if (is_numeric($node) && isset($this->nodes[$node])) {
      $node = $this->nodes[$node];
    }
    $node = (array)node_load($node->nid, NULL, TRUE);
    foreach ($fields as $field) {
      $this->assertFalse(isset($node[$field]), t('Node should be lacking field !key', array('!key' => $field)));
    }
  }

  /**
   * Creates random values for a text field
   * @return An array containing a value key and a format key
   */
  function createRandomTextFieldData() {
    return array(
      'value' => '!SimpleTest! test value' . $this->randomName(60),
      'format' => 2,
    );
  }

  // Login/user helper functions

  /**
   * Creates a user / role with certain permissions and then logs in as that user
   * @param $permissions Array containing list of permissions. If not given, defaults to
   *  access content, administer content types, administer nodes and administer filters.
   */
  function loginWithPermissions($permissions = NULL) {
    if (!isset($permissions)) {
      $permissions = array(
        'access content',
        'administer content types',
        'administer nodes',
        'administer filters',
      );
    }
    $user = $this->drupalCreateUser($permissions);
    $this->drupalLogin($user);
  }

  // Creation helper functions

  /**
   * Creates a number of content types with predictable names (simpletest_t1 ... simpletest_tN)
   * These content types can later be accessed via $this->content_types[0 ... N-1]
   * @param $count Number of content types to create
   */
  function acquireContentTypes($count) {
    $this->content_types = array();
    for ($i = 0; $i < $count; $i++) {
      $name = 'simpletest_t'. ($i + 1);
      $this->content_types[$i] = $this->drupalCreateContentType(array(
        'name' => $name,
        'type' => $name,
      ));
    }
    content_clear_type_cache();
  }

  /**
   * Creates a number of nodes of each acquired content type.
   * Remember to call acquireContentTypes() before calling this, else the content types won't exist.
   * @param $count Number of nodes to create per acquired content type (defaults to 1)
   */
  function acquireNodes($count = 1) {
    $this->nodes = array();
    foreach ($this->content_types as $content_type) {
      for ($i = 0; $i < $count; $i++) {
        $this->nodes[] = $this->drupalCreateNode(array('type' => $content_type->type));
      }
    }
  }

  /**
   * Creates a field instance with a predictable name. Also makes all future calls to functions
   * which take an optional field use this one as the default.
   * @param $settings Array to be passed to content_field_instance_create. If the field_name
   *  or type_name keys are missing, then they will be added. The default field name is
   *  simpletest_fN, where N is 1 for the first created field, and increments. The default
   *  type name is type name of the $content_type argument.
   * @param $content_type Either a content type object, or the index of an acquired content type
   * @return The newly created field instance.
   */
  function createField($settings, $content_type = 0) {
    if (is_numeric($content_type) && isset($this->content_types[$content_type])) {
      $content_type = $this->content_types[$content_type];
    }
    $defaults = array(
      'field_name' => 'simpletest_f'. $this->next_field_n++,
      'type_name' => $content_type->type,
    );
    $settings = $settings + $defaults;
    $this->last_field = content_field_instance_create($settings);
    return $this->last_field;
  }

  /**
   * Creates a textfield instance. Identical to createField() except it ensures that the text module
   * is enabled, and adds default settings of type (text) and widget_type (text_textfield) if they
   * are not given in $settings.
   * @sa createField()
   */
  function createFieldText($settings, $content_type = 0) {
    $defaults = array(
      'type' => 'text',
      'widget_type' => 'text_textfield',
    );
    $settings = $settings + $defaults;
    return $this->createField($settings, $content_type);
  }

  // Field manipulation helper functions

  /**
   * Updates a field instance. Also makes all future calls to functions which take an optional
   * field use the updated one as the default.
   * @param $settings New settings for the field instance. If the field_name or type_name keys
   *  are missing, then they will be taken from $field.
   * @param $field The field instance to update (defaults to the last worked upon field)
   * @return The updated field instance.
   */
  function updateField($settings, $field = NULL) {
    if (!isset($field)) {
      $field = $this->last_field;
    }
    $defaults = array(
      'field_name' => $field['field_name'],
      'type_name'  => $field['type_name'] ,
    );
    $settings = $settings + $defaults;
    $this->last_field = content_field_instance_update($settings);
    return $this->last_field;
  }

  /**
   * Makes a copy of a field instance on a different content type, effectively sharing the field with a new
   * content type. Also makes all future calls to functions which take an optional field use the shared one
   * as the default.
   * @param $new_content_type Either a content type object, or the index of an acquired content type
   * @param $field The field instance to share (defaults to the last worked upon field)
   * @return The shared (newly created) field instance.
   */
  function shareField($new_content_type, $field = NULL) {
    if (!isset($field)) {
      $field = $this->last_field;
    }
    if (is_numeric($new_content_type) && isset($this->content_types[$new_content_type])) {
      $new_content_type = $this->content_types[$new_content_type];
    }
    $field['type_name'] = $new_content_type->type;
    $this->last_field = content_field_instance_create($field);
    return $this->last_field;
  }

  /**
   * Deletes an instance of a field.
   * @param $content_type Either a content type object, or the index of an acquired content type (used only
   *  to get field instance type name).
   * @param $field The field instance to delete (defaults to the last worked upon field, used only to get
   *  field instance field name).
   */
  function deleteField($content_type, $field = NULL) {
    if (!isset($field)) {
      $field = $this->last_field;
    }
    if (is_numeric($content_type) && isset($this->content_types[$content_type])) {
      $content_type = $this->content_types[$content_type];
    }
    content_field_instance_delete($field['field_name'], $content_type->type);
  }
}

class ContentCrudBasicTest extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('CRUD - Basic API tests'),
      'description' => t('Tests the field CRUD (create, read, update, delete) API. <strong>Requires <a href="@schema_link">Schema module</a>.</strong>', array('@schema_link' => 'http://www.drupal.org/project/schema')),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp();
    $this->acquireContentTypes(1);
  }

  function testBasic() {
    // Create a field with both field and instance settings.
    $field = $this->createFieldText(array('widget_type' => 'text_textarea', 'text_processing' => 1, 'rows' => 5), 0);


    // Check that collapse and expand are inverse.
    $fields = content_field_instance_read(array('field_name' => $field['field_name'], 'type_name' => $this->content_types[0]->type));
    $field1 = array_pop($fields);

    $field2 = content_field_instance_collapse($field1);
    $field3 = content_field_instance_expand($field2);
    $field4 = content_field_instance_collapse($field3);

    $this->assertIdentical($field1, $field3, 'collapse then expand is identity');
    $this->assertIdentical($field2, $field4, 'expand then collapse is identity');


    // Check that collapse and expand are both final
    // (e.g. do not further alter the data when called multiple times).
    $fields = content_field_instance_read(array('field_name' => $field['field_name'], 'type_name' => $this->content_types[0]->type));
    $field1 = array_pop($fields);

    $field2 = content_field_instance_collapse($field1);
    $field3 = content_field_instance_collapse($field2);
    $this->assertIdentical($field2, $field3, 'collapse is final');

    $field2 = content_field_instance_expand($field1);
    $field3 = content_field_instance_expand($field2);
    $this->assertIdentical($field2, $field3, 'expand is final');


    // Check that updating a field as is leaves it unchanged.
    $fields = content_field_instance_read(array('field_name' => $field['field_name'], 'type_name' => $this->content_types[0]->type));
    $field1 = array_pop($fields);
    $field2 = content_field_instance_update($field1);
    $fields = content_field_instance_read(array('field_name' => $field['field_name'], 'type_name' => $this->content_types[0]->type));
    $field3 = array_pop($fields);

    $this->assertIdentical($field1, $field3, 'read, update, read is identity');
  }
}

class ContentCrudSingleToMultipleTest extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('CRUD - Single to multiple'),
      'description' => t('Tests the field CRUD (create, read, update, delete) API by creating a single value field and changing it to a multivalue field, sharing it between several content types. <strong>Requires <a href="@schema_link">Schema module</a>.</strong>', array('@schema_link' => 'http://www.drupal.org/project/schema')),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp();
    $this->loginWithPermissions();
    $this->acquireContentTypes(3);
    $this->acquireNodes();
  }

  function testSingleToMultiple() {
    // Create a simple text field
    $this->createFieldText(array('text_processing' => 1));
    $target_schema = array(
      'per_type' => array(
        'simpletest_t1' => array('simpletest_f1' => array('value', 'format'))
      ),
      'per_field' => array(),
    );
    $this->assertSchemaMatchesTables($target_schema);
    $node0values = $this->assertNodeSaveValues(0, array(
      'simpletest_f1' => array(
        0 => $this->createRandomTextFieldData(),
      )
    ));

    // Change the text field to allow multiple values
    $this->updateField(array('multiple' => 1));
    $target_schema = array(
      'per_type' => array(
        'simpletest_t1' => array(),
      ),
      'per_field' => array(
        'simpletest_f1' => array('delta', 'simpletest_f1' => array('value', 'format')),
      ),
    );
    $this->assertSchemaMatchesTables($target_schema);
    $this->assertNodeValues(0, $node0values);

    // Share the text field with 2 additional types t2 and t3.
    for ($share_with_content_type = 1; $share_with_content_type <= 2; $share_with_content_type++) {
      $this->shareField($share_with_content_type);
      // There should be a new 'empty' per-type table for each content type that has fields.
      $target_schema['per_type']['simpletest_t'. ($share_with_content_type + 1)] = array();
      $this->assertSchemaMatchesTables($target_schema);
      // The acquired node index will match the content type index as exactly one node is acquired per content type
      $this->assertNodeSaveValues($share_with_content_type, array(
        'simpletest_f1' => array(
          0 => $this->createRandomTextFieldData(),
        )
      ));
    }

    // Delete the text field from all content types
    for ($delete_from_content_type = 2; $delete_from_content_type >= 0; $delete_from_content_type--) {
      $this->deleteField($delete_from_content_type);
      // Content types that don't have fields any more shouldn't have any per-type table.
      $target_schema['per_type']['simpletest_t'. ($delete_from_content_type + 1)] = NULL;
      // After removing the last instance, there should be no table for the field either.
      if ($delete_from_content_type == 0) {
        $target_schema['per_field']['simpletest_f1'] = NULL;
      }
      $this->assertSchemaMatchesTables($target_schema);
      // The acquired node index will match the content type index as exactly one node is acquired per content type
      $this->assertNodeMissingFields($this->nodes[$delete_from_content_type], array('simpletest_f1'));
    }
  }
}

class ContentCrudMultipleToSingleTest extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('CRUD - Multiple to single'),
      'description' => t('Tests the field CRUD (create, read, update, delete) API by creating a multivalue field and changing it to a single value field, sharing it between several content types. <strong>Requires <a href="@schema_link">Schema module</a>.</strong>', array('@schema_link' => 'http://www.drupal.org/project/schema')),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp();
    $this->loginWithPermissions();
    $this->acquireContentTypes(3);
    $this->acquireNodes();
  }

  function testMultipleToSingle() {
    // Create a multivalue text field
    $this->createFieldText(array('text_processing' => 1, 'multiple' => 1));
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array(),
      ),
      'per_field' => array(
        'simpletest_f1' => array('delta', 'simpletest_f1' => array('value', 'format')),
      ),
    ));
    $this->assertNodeSaveValues(0, array(
      'simpletest_f1' => array(
        0 => $this->createRandomTextFieldData(),
        1 => $this->createRandomTextFieldData(),
        2 => $this->createRandomTextFieldData(),
      )
    ));

    // Change to a simple text field
    $this->updateField(array('multiple' => 0));
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array('simpletest_f1' => array('value', 'format')),
      ),
      'per_field' => array(
        'simpletest_f1' => NULL,
      ),
    ));
    $node0values = $this->assertNodeSaveValues(0, array(
      'simpletest_f1' => array(
        0 => $this->createRandomTextFieldData(),
      )
    ));

    // Share the text field with other content type
    $this->shareField(1);
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array(),
        'simpletest_t2' => array(),
      ),
      'per_field' => array(
        'simpletest_f1' => array('simpletest_f1' => array('value', 'format')),
      ),
    ));
    $node1values = $this->assertNodeSaveValues(1, array(
      'simpletest_f1' => array(
        0 => $this->createRandomTextFieldData(),
      )
    ));
    $this->assertNodeValues(0, $node0values);

    // Share the text field with a 3rd type
    $this->shareField(2);
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array(),
        'simpletest_t2' => array(),
        'simpletest_t3' => array(),
      ),
      'per_field' => array(
        'simpletest_f1' => array('simpletest_f1' => array('value', 'format')),
      ),
    ));
    $this->assertNodeSaveValues(2, array(
      'simpletest_f1' => array(
        0 => $this->createRandomTextFieldData(),
      )
    ));
    $this->assertNodeValues(1, $node1values);
    $this->assertNodeValues(0, $node0values);

    // Remove text field from 3rd type
    $this->deleteField(2);
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array(),
        'simpletest_t2' => array(),
        'simpletest_t3' => NULL,
      ),
      'per_field' => array(
        'simpletest_f1' => array('simpletest_f1' => array('value', 'format')),
      ),
    ));
    $this->assertNodeMissingFields($this->nodes[2], array('simpletest_f1'));

    // Remove text field from 2nd type (field isn't shared anymore)
    $this->deleteField(1);
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => array('simpletest_f1' => array('value', 'format')),
        'simpletest_t2' => NULL,
        'simpletest_t3' => NULL,
      ),
      'per_field' => array(
        'simpletest_f1' => NULL,
      ),
    ));
    $this->assertNodeMissingFields(1, array('simpletest_f1'));
    $this->assertNodeValues(0, $node0values);

    // Remove text field from original type
    $this->deleteField(0);
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        'simpletest_t1' => NULL,
        'simpletest_t2' => NULL,
        'simpletest_t3' => NULL,
      ),
      'per_field' => array(
        'simpletest_f1' => NULL,
      ),
    ));
    $this->assertNodeMissingFields(0, array('simpletest_f1'));
  }
}

class ContentUICrud extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Admin UI'),
      'description' => t('Tests the CRUD (create, read, update, delete) operations for content fields via the UI. <strong>Requires <a href="@schema_link">Schema module</a>.</strong>', array('@schema_link' => 'http://www.drupal.org/project/schema')),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp('fieldgroup');
    $this->loginWithPermissions();
  }

  function testAddFieldUI() {
    // Add a content type with a random name (to avoid schema module problems).
    $type1 = 'simpletest'. mt_rand();
    $type1_name = $this->randomName(10);
    $edit = array(
      'type' => $type1,
      'name' => $type1_name,
    );
    $this->drupalPost('admin/content/types/add', $edit, 'Save content type');
    $admin_type1_url = 'admin/content/node-type/'. $type1;

    // Create a text field via the UI.
    $field_name = strtolower($this->randomName(10));
    $field_label = $this->randomName(10);
    $edit = array(
      '_add_new_field[label]' => $field_label,
      '_add_new_field[field_name]' => $field_name,
      '_add_new_field[type]' => 'text',
      '_add_new_field[widget_type]' => 'text_textfield',
    );
    $this->drupalPost($admin_type1_url .'/fields', $edit, 'Save');
    $this->assertRaw('These settings apply only to the <em>'. $field_label .'</em> field', 'Field settings page displayed');
    $this->assertRaw('Size of textfield', 'Field and widget types correct.');
    $this->assertNoRaw('Change basic information', 'No basic information displayed');
    $field_name = 'field_'. $field_name;

    $edit = array();
    // POST to the page without reloading.
    $this->drupalPost(NULL, $edit, 'Save field settings');
    $this->assertRaw('Added field <em>'. $field_label .'</em>.', 'Field settings saved');
    $field_type1_url = $admin_type1_url .'/fields/'. $field_name;
    $this->assertRaw($field_type1_url, 'Field displayed on overview.');

    // Check the schema - the values should be in the per-type table.
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        $type1 => array($field_name => array('value')),
      ),
    ));


    // Add a second content type.
    $type2 = 'simpletest'. mt_rand();
    $type2_name = $this->randomName(10);
    $edit = array(
      'type' => $type2,
      'name' => $type2_name,
    );
    $this->drupalPost('admin/content/types/add', $edit, 'Save content type');
    $admin_type2_url = 'admin/content/node-type/'. $type2;

    // Add the same field to the second content type.
    $edit = array(
      '_add_existing_field[label]' => $field_label,
      '_add_existing_field[field_name]' => $field_name,
      '_add_existing_field[widget_type]' => 'text_textarea',
    );
    $this->drupalPost($admin_type2_url .'/fields', $edit, 'Save');
    $this->assertRaw('These settings apply only to the <em>'. $field_label .'</em> field', 'Field settings page displayed');
    $this->assertRaw('Rows', 'Field and widget types correct.');
    $this->assertNoRaw('Change basic information', 'No basic information displayed');

    $edit = array();
    $this->drupalPost(NULL, $edit, 'Save field settings');
    $this->assertRaw('Added field <em>'. $field_label .'</em>.', 'Field settings saved');
    $field_type2_url = $admin_type2_url .'/fields/'. $field_name;
    $this->assertRaw($field_type2_url, 'Field displayed on overview.');

    // Check that a separate table is created for the shared field, and
    // that it's values are no longer in the per-type tables.
    $this->assertSchemaMatchesTables(array(
      'per_field' => array(
        $field_name => array($field_name => array('value')),
      ),
      'per_type' => array(
        $type1 => array(),
        $type2 => array(),
      ),
    ));


    // Chancge the basic settings for this field.
    $edit = array();
    $this->drupalPost($field_type2_url, $edit, 'Change basic information');
    $this->assertRaw('Edit basic information', 'Basic information form displayed');

    $field_label2 = $this->randomName(10);
    $edit = array(
      'label' => $field_label2,
      'widget_type' => 'text_textfield',
    );
    $this->drupalPost(NULL, $edit, 'Continue');
    $this->assertRaw('These settings apply only to the <em>'. $field_label2 .'</em> field', 'Label changed');
    $this->assertRaw('Size of textfield', 'Widget changed');

    $edit = array();
    // POST to the page without reloading.
    $this->drupalPost(NULL, $edit, 'Save field settings');
    $this->assertRaw('Saved field <em>'. $field_label2 .'</em>.', 'Field settings saved');


    // Add a group to the second content type.
    $group1_name = strtolower($this->randomName(10));
    $group1_label = $this->randomName(10);
    $edit = array(
      '_add_new_group[label]' => $group1_label,
      '_add_new_group[group_name]' => $group1_name,
    );
    $this->drupalPost($admin_type2_url .'/fields', $edit, 'Save');
    $group1_name = 'group_'. $group1_name;
    $this->assertRaw($admin_type2_url .'/groups/'. $group1_name, 'Group created');


    // Remove the field from the second type.
    $edit = array();
    $this->drupalPost($field_type2_url .'/remove', $edit, 'Remove');
    $this->assertRaw('Removed field <em>'. $field_label2 .'</em> from <em>'. $type2_name .'</em>', 'Field removed');
    $this->assertNoRaw($field_type2_url, 'Field not displayed on overview.');

    // Check the schema - the values should be in the per-type table.
    $this->assertSchemaMatchesTables(array(
      'per_type' => array(
        $type1 => array($field_name => array('value')),
      ),
    ));

    // Add a new field, an existing field, and a group in the same submit.
    $field2_label = $this->randomName(10);
    $field2_name = strtolower($this->randomName(10));
    $group2_label = $this->randomName(10);
    $group2_name = strtolower($this->randomName(10));
    $edit = array(
      '_add_new_field[label]' => $field2_label,
      '_add_new_field[field_name]' => $field2_name,
      '_add_new_field[type]' => 'text',
      '_add_new_field[widget_type]' => 'text_textfield',
      '_add_new_field[parent]' => $group1_name,
      '_add_existing_field[label]' => $field_label,
      '_add_existing_field[field_name]' => $field_name,
      '_add_existing_field[widget_type]' => 'text_textarea',
      '_add_existing_field[parent]' => '_add_new_group',
      '_add_new_group[label]' => $group2_label,
      '_add_new_group[group_name]' => $group2_name,
    );
    $this->drupalPost($admin_type2_url .'/fields', $edit, 'Save');
    $this->assertRaw('These settings apply only to the <em>'. $field2_label .'</em> field', 'Field settings page for new field displayed');
    // Submit new field settings
    $edit = array();
    $this->drupalPost(NULL, $edit, 'Save field settings');
    $this->assertRaw('Added field <em>'. $field2_label .'</em>.', 'Field settings for new field saved');
    $this->assertRaw('These settings apply only to the <em>'. $field_label .'</em> field', 'Field settings page for existing field displayed');
    // Submit existing field settings
    $edit = array();
    $this->drupalPost(NULL, $edit, 'Save field settings');
    $this->assertRaw('Added field <em>'. $field_label .'</em>.', 'Field settings for existing field saved');
    $field2_name = 'field_'. $field2_name;
    $field2_type2_url = $admin_type2_url .'/fields/'. $field2_name;
    $this->assertRaw($field2_type2_url, 'New field displayed in overview');
    $this->assertRaw($field_type2_url, 'Existing field displayed in overview');
    $group2_name = 'group_'. $group2_name;
    $this->assertRaw($admin_type2_url .'/groups/'. $group2_name, 'New group displayed in overview');

    // Check Parenting
    $groups = fieldgroup_groups($type2, FALSE, TRUE);
    $this->assertTrue(isset($groups[$group1_name]['fields'][$field2_name]), 'New field in correct group');
    $this->assertTrue(isset($groups[$group2_name]['fields'][$field_name]), 'Existing field in correct group');
    $this->assertFieldByXPath('//select[@id="edit-'. strtr($field2_name, '_', '-') .'-parent"]//option[@selected]', $group1_name, 'Parenting for new field correct in overview');
    $this->assertFieldByXPath('//select[@id="edit-'. strtr($field_name, '_', '-') .'-parent"]//option[@selected]', $group2_name, 'Parenting for existing field correct in overview');

    // Check the schema : field1 is shared, field2 is in the per-type table.
    $this->assertSchemaMatchesTables(array(
      'per_field' => array(
        $field_name => array($field_name => array('value')),
      ),
      'per_type' => array(
        $type1 => array(),
        $type2 => array($field2_name => array('value')),
      ),
    ));

    // TODO : test validation failures...
    // TODO : test ordering and extra fields...
  }

  function testFieldContentUI() {
    // Create a content type with a field
    $type1 = 'simpletest'. mt_rand();
    $type1_obj = $this->drupalCreateContentType(array('type' => $type1));
    $admin_type1_url = 'admin/content/node-type/'. $type1;
    $field_name  = strtolower($this->randomName(10));
    $field_url = 'field_'. $field_name;
    $field = $this->createFieldText(array('text_processing' => 1, 'multiple' => 0, 'field_name' => $field_url), $type1_obj);

    // Save a node with content in the text field
    $edit = array();
    $edit['title'] = $this->randomName(20);
    $edit['body'] = $this->randomName(20);
    $value = $this->randomName(20);
    $edit[$field_url.'[0][value]'] = $value;
    $this->drupalPost('node/add/'. $type1, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value, 'Textfield value saved and displayed');

    // Alter the field to have unlimited values
    $edit = array();
    $edit['multiple']  = '1';
    $this->drupalPost($admin_type1_url .'/fields/'. $field_url, $edit, 'Save field settings');

    // Save a node with content in multiple text fields
    $edit = array();
    $edit['title'] = $this->randomName(20);
    $edit['body'] = $this->randomName(20);
    // Add more textfields (non-JS).
    $this->drupalPost('node/add/'. $type1, $edit, "Add another item");
    $this->drupalPost(NULL, $edit, "Add another item");
    $value1 = $this->randomName(20);
    $value2 = $this->randomName(20);
    $value3 = $this->randomName(20);
    $edit[$field_url.'[0][value]'] = $value1;
    $edit[$field_url.'[1][value]'] = $value2;
    $edit[$field_url.'[2][value]'] = $value3;

    // This will fail if we don't have at least 3 textfields.
    $this->drupalPost(NULL, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value3, '3rd textfield value saved and displayed');
  }
}

class ContentOptionWidgetTest extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Option widgets'),
      'description' => t('Tests the optionwidgets.'),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp('optionwidgets');
    $this->loginWithPermissions();
    $this->acquireContentTypes(1);
  }

  // TODO: test a number field with optionwidgets stores 0 correctly ?
  // TODO: test the case where aliases and values overlap ? (http://drupal.org/node/281749)
  // TODO: test noderef select widget...

  /**
   * On/Off Checkbox, not required:
   * - Create a node with the value checked.
   * - FAILS: Edit the node and uncheck the value.
   *
   * On/Off Checkbox, required:
   * - TODO: what behavior do we want ?
   */
  function testOnOffCheckbox() {
    $type = $this->content_types[0];
    $type_url = str_replace('_', '-', $type->type);

    // Create the field.
    $on_text = $this->randomName(5);
    $on_value = $this->randomName(5);
    $off_text = $on_text. '_off';
    $off_value = $on_value. '_off';

    $settings = array(
      'type' => 'text',
      'widget_type' => 'optionwidgets_onoff',
      'allowed_values' => "$off_value|$off_text\r\n$on_value|$on_text",
    );
    $field = $this->createField($settings, 0);
    $field_name = $field['field_name'];

    // Create a node with the checkbox on.
    $edit = array(
      'title' => $this->randomName(20),
      'body' => $this->randomName(20),
      $field_name.'[value]' => $on_value,
    );
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->assertEqual($node->{$field_name}[0]['value'], $on_value, 'Checkbox: checked (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($on_text, 'Checkbox: checked (displayed)');

    // Edit the node and uncheck the box.
    $edit = array(
      $field_name.'[value]' => FALSE,
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertEqual($node->{$field_name}[0]['value'], $off_value, 'Checkbox: unchecked (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($off_text, 'Checkbox: unchecked (displayed)');
  }

  /**
   * Single select, not required:
   * - TODO: check there's a 'none' choice in the form.
   * - Create a node with one value selected.
   * - Edit the node and unselect the value (selecting '- None -').
   *
   * Single select, required:
   * - TODO: check there's no 'none' choice in the form.
   *
   * Multiple select, not required:
   * - TODO: check there's a 'none' choice in the form.
   * - Edit the node and select multiple values.
   * - Edit the node and unselect one value.
   * - Edit the node and unselect the values (selecting '- None -').
   * - Edit the node and unselect the values (selecting nothing).
   *
   * Multiple select, required:
   * - TODO: check there's no 'none' choice in the form.
   * - Check the form doesn't submit when nothing is selected.
   */
  function testSelect() {
    $type = $this->content_types[0];
    $type_url = str_replace('_', '-', $type->type);

    // Create the field - start with 'single'.
    $value1 = $this->randomName(5);
    $value1_alias = $value1 .'_alias';
    $value2 = $this->randomName(5);
    $value2_alias = $value2 .'_alias';

    $settings = array(
      'type' => 'text',
      'widget_type' => 'optionwidgets_select',
      'allowed_values' => "$value1|$value1_alias\r\n$value2|$value2_alias",
    );
    $field = $this->createField($settings, 0);
    $field_name = $field['field_name'];

    // Create a node with one value selected
    $edit = array(
      'title' => $this->randomName(20),
      'body' => $this->randomName(20),
    );
    $edit[$field_name.'[value]'] = $value1;
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Select: selected (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Select: selected (displayed)');

    // Edit the node and unselect the value (selecting '- None -').
    $edit = array(
      $field_name.'[value]' => '',
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[0]['value'], NULL, 'Select: unselected (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertNoText($value1_alias, 'Select: unselected (displayed)');

    // Change to a multiple field
    $field = $this->updateField(array('multiple' => '1', 'required' => '0'));

    // Edit the node and select multiple values.
    $edit = array(
      $field_name.'[value][]' => array($value1 => $value1, $value2 => $value2),
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Multiple Select: selected 1 (saved)');
    $this->assertEqual($node->{$field_name}[1]['value'], $value2, 'Multiple Select: selected 2 (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Multiple Select: selected 1 (displayed)');
    $this->assertText($value2_alias, 'Multiple Select: selected 2 (displayed)');

    // Edit the node and unselect one value.
    $edit = array(
      $field_name.'[value][]' => array($value1 => $value1),
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Multiple Select: selected 1 (saved)');
    $this->assertTrue(!isset($node->{$field_name}[1]), 'Multiple Select: unselected 2 (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Multiple Select: selected 1 (displayed)');
    $this->assertNoText($value2_alias, 'Multiple Select: unselected 2 (displayed)');

    // Edit the node and unselect the values (selecting '- None -').
    $edit = array(
      $field_name.'[value][]' => array('' => ''),
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[0]['value'], NULL, 'Multiple Select: unselected 1 ("-none-" selected) (saved)');
    $this->assertTrue(!isset($node->{$field_name}[1]), 'Multiple Select: unselected 2 ("-none-" selected) (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertNoText($value1_alias, 'Multiple Select: unselected 1 ("-none-" selected) (displayed)');
    $this->assertNoText($value2_alias, 'Multiple Select: unselected 2 ("-none-" selected) (displayed)');

    // Edit the node and unselect the values (selecting nothing).
    // We first need to put values back in (no test needed).
    $edit = array();
    $edit[$field_name.'[value][]'] = array($value1 => FALSE, $value2 => FALSE);
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $edit = array();
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[0]['value'], NULL, 'Multiple Select: unselected 1 (no selection) (saved)');
    $this->assertTrue(!isset($node->{$field_name}[1]), 'Multiple Select: unselected 2 (no selection) (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertNoText($value1_alias, 'Multiple Select: unselected 1 (no selection) (displayed)');
    $this->assertNoText($value2_alias, 'Multiple Select: unselected 2 (no selection) (displayed)');

    // Change the field to 'required'.
    $field = $this->updateField(array('required' => '1'));

    // Check the form doesn't submit when nothing is selected.
    $edit = array();
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $this->assertRaw(t('!name field is required.', array('!name' => t($field['widget']['label']))), 'Multiple Select: "required" property is respected');

    $edit = array(
      'title' => $this->randomName(20),
      'body' => $this->randomName(20),
    );
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $this->assertRaw(t('!name field is required.', array('!name' => t($field['widget']['label']))), 'Multiple Select: "required" property is respected');

  }

  /**
   * Single (radios), not required:
   * - TODO: check there's a 'none' choice in the form.
   * - Create a node with one value selected.
   * - Edit the node and unselect the value (selecting '- None -').
   *
   * Single (radios), required:
   * - TODO: check there's no 'none' choice in the form.
   * - Check the form doesn't submit when nothing is selected.
   */
  function testRadios() {
    $type = $this->content_types[0];
    $type_url = str_replace('_', '-', $type->type);

    // Create the field - 'single' (radios).
    $value1 = $this->randomName(5);
    $value1_alias = $value1 .'_alias';
    $value2 = $this->randomName(5);
    $value2_alias = $value2 .'_alias';
    $settings = array(
      'type' => 'text',
      'widget_type' => 'optionwidgets_buttons',
      'allowed_values' => "$value1|$value1_alias\r\n$value2|$value2_alias",
    );
    $field = $this->createField($settings, 0);
    $field_name = $field['field_name'];

    // Create a node with one value selected
    $edit = array();
    $edit['title'] = $this->randomName(20);
    $edit['body'] = $this->randomName(20);
    $edit[$field_name.'[value]'] = $value1;
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Radios: checked (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Radios: checked (displayed)');

    // Edit the node and unselect the value (selecting '- None -').
    $edit = array();
    $edit[$field_name.'[value]'] = '';
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[0]['value'], NULL, 'Radios: unchecked (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertNoText($value1_alias, 'Radios: unchecked (displayed)');

    // Change field to required.
    $field = $this->updateField(array('required' => '1'));

    // Check the form doesn't submit when nothing is selected.
    // Doing this on the pre-filled node doesn't take, so we test that on a new node.
    $edit = array();
    $edit['title'] = $this->randomName(20);
    $edit['body'] = $this->randomName(20);
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $this->assertRaw(t('!name field is required.', array('!name' => t($field['widget']['label']))), 'Radios: "required" property is respected');
  }

  /**
   * Multiple (checkboxes), not required:
   * - TODO: check there's no 'none' choice in the form.
   * - Create a node with two values.
   * - Edit the node and select only one value.
   * - Edit the node and unselect the values (selecting nothing).
   *
   * Multiple (checkboxes), required:
   * - TODO: check there's no 'none' choice in the form.
   * - Check the form doesn't submit when nothing is selected.
   */
  function testChecboxes() {
    $type = $this->content_types[0];
    $type_url = str_replace('_', '-', $type->type);

    // Create the field -  'multiple' (checkboxes).
    $value1 = $this->randomName(5);
    $value1_alias = $value1 .'_alias';
    $value2 = $this->randomName(5);
    $value2_alias = $value2 .'_alias';
    $settings = array(
      'type' => 'text',
      'multiple' => '1',
      'widget_type' => 'optionwidgets_buttons',
      'allowed_values' => "$value1|$value1_alias\r\n$value2|$value2_alias",
    );
    $field = $this->createField($settings, 0);
    $field_name = $field['field_name'];

    // Create a node with two values selected
    $edit = array(
      'title' => $this->randomName(20),
      'body' => $this->randomName(20),
      $field_name.'[value]['. $value1 .']' => $value1,
      $field_name.'[value]['. $value2 .']' => $value2,
    );
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $node = node_load(array('title' => $edit['title']));
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Checkboxes: selected 1 (saved)');
    $this->assertEqual($node->{$field_name}[1]['value'], $value2, 'Checkboxes: selected 2 (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Checkboxes: selected 1 (displayed)');
    $this->assertText($value2_alias, 'Checkboxes: selected 2 (displayed)');

    // Edit the node and unselect the values (selecting nothing -
    // there is no 'none' choice for checkboxes).
    $edit = array(
      $field_name.'[value]['. $value1 .']' => $value1,
      $field_name.'[value]['. $value2 .']' => FALSE,
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertEqual($node->{$field_name}[0]['value'], $value1, 'Checkboxes: selected 1 (saved)');
    $this->assertTrue(!isset($node->{$field_name}[1]), 'Checkboxes: unselected 2 (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1_alias, 'Checkboxes: selected 1 (displayed)');
    $this->assertNoText($value2_alias, 'Checkboxes: unselected 2 (displayed)');

    // Edit the node and unselect the values (selecting nothing -
    // there is no 'none' choice for checkboxes).
    $edit = array(
      $field_name.'[value]['. $value1 .']' => FALSE,
      $field_name.'[value]['. $value2 .']' => FALSE,
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[0]['value'], NULL, 'Checkboxes: unselected 1 (no selection) (saved)');
    $this->assertTrue(!isset($node->{$field_name}[1]), 'Checkboxes: unselected 2 (no selection) (saved)');
    $this->drupalGet('node/'. $node->nid);
    $this->assertNoText($value1_alias, 'Checkboxes: unselected 1 (no selection) (displayed)');
    $this->assertNoText($value2_alias, 'Checkboxes: unselected 2 (no selection) (displayed)');

    // Change field to required.
    $field = $this->updateField(array('required' => '1'));

    // Check the form doesn't submit when nothing is selected.
    $edit = array(
      $field_name.'[value]['. $value1 .']' => FALSE,
      $field_name.'[value]['. $value2 .']' => FALSE,
    );
    $this->drupalPost('node/'. $node->nid .'/edit', $edit, 'Save');
    $this->assertRaw(t('!name field is required.', array('!name' => t($field['widget']['label']))), 'Checkboxes: "required" property is respected');

    $edit = array();
    $edit['title'] = $this->randomName(20);
    $edit['body'] = $this->randomName(20);
    $this->drupalPost('node/add/'. $type_url, $edit, 'Save');
    $this->assertRaw(t('!name field is required.', array('!name' => t($field['widget']['label']))), 'Checkboxes: "required" property is respected');
  }

}

class ContentEmptyDeltaTest extends ContentCrudTestCase {
  public static function getInfo() {
    return array(
      'name' => t('Empty deltas'),
      'description' => t('Test leaving empty values on a multivalue field and then removing them.'),
      'group' => t('CCK'),
    );
  }

  function setUp() {
    parent::setUp();
    $this->loginWithPermissions();
    $this->acquireContentTypes(1);
  }

  function testEmptyTextField() {
    // Create a content type with a multivalue text field.
    $type = $this->content_types[0];
    $type_url = str_replace('_', '-', $type->type);
    $value1 = $this->randomName(5);
    $value2 = $this->randomName(5);
    $value3 = $this->randomName(5);
    $field = $this->createFieldText(array('text_processing' => 0, 'multiple' => 1));
    $field_name = $field['field_name'];

    // Create a node with three values set.
    $edit = array(
      'title' => $this->randomName(20),
      'body' => $this->randomName(20),
      'type' => $type->name,
    );
    $edit[$field_name][0]['value'] = $value1;
    $edit[$field_name][1]['value'] = $value2;
    $edit[$field_name][2]['value'] = $value3;
    $node = $this->drupalCreateNode($edit);
    $max_delta = max(array_keys($node->{$field_name}));
    $this->assertEqual($max_delta, 2, 'Three values saved, highest delta is 2');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1, 'First value displayed');
    $this->assertText($value2, 'Second value displayed');
    $this->assertText($value3, 'Third value displayed');

    // Set second value to an empty string.
    $node->{$field_name}[1]['value'] = '';
    node_save($node);
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertIdentical($node->{$field_name}[1]['value'], NULL, 'Second value is empty');
    $max_delta = max(array_keys($node->{$field_name}));
    $this->assertEqual($max_delta, 2, 'Three values saved, highest delta is 2');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1, 'First value displayed');
    $this->assertNoText($value2, 'Second value not displayed');
    $this->assertText($value3, 'Third value displayed');

    // Remove the second value.
    $node->{$field_name}[1]['_remove'] = 1;
    node_save($node);
    $node = node_load($node->nid, NULL, TRUE);
    $this->assertEqual($node->{$field_name}[1]['value'], $value3, 'Third value has moved to delta 1');
    $max_delta = max(array_keys($node->{$field_name}));
    $this->assertEqual($max_delta, 1, 'Two values saved, highest delta is 1');
    $this->drupalGet('node/'. $node->nid);
    $this->assertText($value1, 'First value displayed');
    $this->assertNoText($value2, 'Second value not displayed');
    $this->assertText($value3, 'Third value displayed');
  }
}