<?php

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

use Drupal\simpletest\WebTestBase;
use Drupal\simpletest\UnitTestBase;

/**
 * TODO: Test the following functions.
 *
 * image.effects.inc:
 *   image_style_generate()
 *   image_style_create_derivative()
 *
 * image.module:
 *   image_style_load()
 *   image_style_save()
 *   image_style_delete()
 *   image_style_options()
 *   image_style_flush()
 *   image_effect_definition_load()
 *   image_effect_load()
 *   image_effect_save()
 *   image_effect_delete()
 *   image_filter_keyword()
 */

/**
 * This class provides methods specifically for testing Image's field handling.
 */
class ImageFieldTestCase extends WebTestBase {
  protected $admin_user;

  function setUp() {
    $modules = func_get_args();
    if (isset($modules[0]) && is_array($modules[0])) {
      $modules = $modules[0];
    }
    $modules[] = 'node';
    $modules[] = 'image';
    parent::setUp($modules);

    // Create Basic page and Article node types.
    if ($this->profile != 'standard') {
      $this->drupalCreateContentType(array('type' => 'page', 'name' => 'Basic page'));
      $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
    }

    $this->admin_user = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'create article content', 'edit any article content', 'delete any article content', 'administer image styles'));
    $this->drupalLogin($this->admin_user);
  }

  /**
   * Create a new image field.
   *
   * @param $name
   *   The name of the new field (all lowercase), exclude the "field_" prefix.
   * @param $type_name
   *   The node type that this field will be added to.
   * @param $field_settings
   *   A list of field settings that will be added to the defaults.
   * @param $instance_settings
   *   A list of instance settings that will be added to the instance defaults.
   * @param $widget_settings
   *   A list of widget settings that will be added to the widget defaults.
   */
  function createImageField($name, $type_name, $field_settings = array(), $instance_settings = array(), $widget_settings = array()) {
    $field = array(
      'field_name' => $name,
      'type' => 'image',
      'settings' => array(),
      'cardinality' => !empty($field_settings['cardinality']) ? $field_settings['cardinality'] : 1,
    );
    $field['settings'] = array_merge($field['settings'], $field_settings);
    field_create_field($field);

    $instance = array(
      'field_name' => $field['field_name'],
      'entity_type' => 'node',
      'label' => $name,
      'bundle' => $type_name,
      'required' => !empty($instance_settings['required']),
      'settings' => array(),
      'widget' => array(
        'type' => 'image_image',
        'settings' => array(),
      ),
    );
    $instance['settings'] = array_merge($instance['settings'], $instance_settings);
    $instance['widget']['settings'] = array_merge($instance['widget']['settings'], $widget_settings);
    return field_create_instance($instance);
  }

  /**
   * Upload an image to a node.
   *
   * @param $image
   *   A file object representing the image to upload.
   * @param $field_name
   *   Name of the image field the image should be attached to.
   * @param $type
   *   The type of node to create.
   */
  function uploadNodeImage($image, $field_name, $type) {
    $edit = array(
      'title' => $this->randomName(),
    );
    $edit['files[' . $field_name . '_' . LANGUAGE_NOT_SPECIFIED . '_0]'] = drupal_realpath($image->uri);
    $this->drupalPost('node/add/' . $type, $edit, t('Save'));

    // Retrieve ID of the newly created node from the current URL.
    $matches = array();
    preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
    return isset($matches[1]) ? $matches[1] : FALSE;
  }
}

/**
 * Tests the functions for generating paths and URLs for image styles.
 */
class ImageStylesPathAndUrlUnitTest extends WebTestBase {
  protected $style_name;
  protected $image_info;
  protected $image_filepath;

  public static function getInfo() {
    return array(
      'name' => 'Image styles path and URL functions',
      'description' => 'Tests functions for generating paths and URLs to image styles.',
      'group' => 'Image',
    );
  }

  function setUp() {
    parent::setUp(array('image', 'image_module_test'));

    $this->style_name = 'style_foo';
    image_style_save(array('name' => $this->style_name));
  }

  /**
   * Test image_style_path().
   */
  function testImageStylePath() {
    $scheme = 'public';
    $actual = image_style_path($this->style_name, "$scheme://foo/bar.gif");
    $expected = "$scheme://styles/" . $this->style_name . "/$scheme/foo/bar.gif";
    $this->assertEqual($actual, $expected, t('Got the path for a file URI.'));

    $actual = image_style_path($this->style_name, 'foo/bar.gif');
    $expected = "$scheme://styles/" . $this->style_name . "/$scheme/foo/bar.gif";
    $this->assertEqual($actual, $expected, t('Got the path for a relative file path.'));
  }

  /**
   * Test image_style_url() with a file using the "public://" scheme.
   */
  function testImageStyleUrlAndPathPublic() {
    $this->_testImageStyleUrlAndPath('public');
  }

  /**
   * Test image_style_url() with a file using the "private://" scheme.
   */
  function testImageStyleUrlAndPathPrivate() {
    $this->_testImageStyleUrlAndPath('private');
  }

  /**
   * Test image_style_url() with the "public://" scheme and unclean URLs.
   */
   function testImageStylUrlAndPathPublicUnclean() {
     $this->_testImageStyleUrlAndPath('public', FALSE);
   }

  /**
   * Test image_style_url() with the "private://" schema and unclean URLs.
   */
  function testImageStyleUrlAndPathPrivateUnclean() {
    $this->_testImageStyleUrlAndPath('private', FALSE);
  }

  /**
   * Test image_style_url().
   */
  function _testImageStyleUrlAndPath($scheme, $clean_url = TRUE) {
    $script_path_original = $GLOBALS['script_path'];
    $GLOBALS['script_path'] = $clean_url ? '' : 'index.php/';

    // Make the default scheme neither "public" nor "private" to verify the
    // functions work for other than the default scheme.
    variable_set('file_default_scheme', 'temporary');

    // Create the directories for the styles.
    $directory = $scheme . '://styles/' . $this->style_name;
    $status = file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
    $this->assertNotIdentical(FALSE, $status, t('Created the directory for the generated images for the test style.'));

    // Create a working copy of the file.
    $files = $this->drupalGetTestFiles('image');
    $file = reset($files);
    $image_info = image_get_info($file->uri);
    $original_uri = file_unmanaged_copy($file->uri, $scheme . '://', FILE_EXISTS_RENAME);
    // Let the image_module_test module know about this file, so it can claim
    // ownership in hook_file_download().
    variable_set('image_module_test_file_download', $original_uri);
    $this->assertNotIdentical(FALSE, $original_uri, t('Created the generated image file.'));

    // Get the URL of a file that has not been generated and try to create it.
    $generated_uri = $scheme . '://styles/' . $this->style_name . '/' . $scheme . '/'. drupal_basename($original_uri);
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $generate_url = image_style_url($this->style_name, $original_uri);

    if ($GLOBALS['script_path']) {
      $this->assertTrue(strpos($generate_url, $GLOBALS['script_path']) !== FALSE, 'When using non-clean URLS, the system path contains the script name.');
    }

    // Fetch the URL that generates the file.
    $this->drupalGet($generate_url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $this->assertRaw(file_get_contents($generated_uri), t('URL returns expected file.'));
    $generated_image_info = image_get_info($generated_uri);
    $this->assertEqual($this->drupalGetHeader('Content-Type'), $generated_image_info['mime_type'], t('Expected Content-Type was reported.'));
    $this->assertEqual($this->drupalGetHeader('Content-Length'), $generated_image_info['file_size'], t('Expected Content-Length was reported.'));
    if ($scheme == 'private') {
      $this->assertEqual($this->drupalGetHeader('X-Image-Owned-By'), 'image_module_test', t('Expected custom header has been added.'));
    }

    $GLOBALS['script_path'] = $script_path_original;
  }
}

/**
 * Use the image_test.module's mock toolkit to ensure that the effects are
 * properly passing parameters to the image toolkit.
 */
class ImageEffectsUnitTest extends ImageToolkitTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Image effects',
      'description' => 'Test that the image effects pass parameters to the toolkit correctly.',
      'group' => 'Image',
    );
  }

  function setUp() {
    parent::setUp('image_test');
    module_load_include('inc', 'image', 'image.effects');
  }

  /**
   * Test the image_resize_effect() function.
   */
  function testResizeEffect() {
    $this->assertTrue(image_resize_effect($this->image, array('width' => 1, 'height' => 2)), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('resize'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual($calls['resize'][0][1], 1, t('Width was passed correctly'));
    $this->assertEqual($calls['resize'][0][2], 2, t('Height was passed correctly'));
  }

  /**
   * Test the image_scale_effect() function.
   */
  function testScaleEffect() {
    // @todo: need to test upscaling.
    $this->assertTrue(image_scale_effect($this->image, array('width' => 10, 'height' => 10)), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('resize'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual($calls['resize'][0][1], 10, t('Width was passed correctly'));
    $this->assertEqual($calls['resize'][0][2], 5, t('Height was based off aspect ratio and passed correctly'));
  }

  /**
   * Test the image_crop_effect() function.
   */
  function testCropEffect() {
    // @todo should test the keyword offsets.
    $this->assertTrue(image_crop_effect($this->image, array('anchor' => 'top-1', 'width' => 3, 'height' => 4)), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('crop'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual($calls['crop'][0][1], 0, t('X was passed correctly'));
    $this->assertEqual($calls['crop'][0][2], 1, t('Y was passed correctly'));
    $this->assertEqual($calls['crop'][0][3], 3, t('Width was passed correctly'));
    $this->assertEqual($calls['crop'][0][4], 4, t('Height was passed correctly'));
  }

  /**
   * Test the image_scale_and_crop_effect() function.
   */
  function testScaleAndCropEffect() {
    $this->assertTrue(image_scale_and_crop_effect($this->image, array('width' => 5, 'height' => 10)), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('resize', 'crop'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual($calls['crop'][0][1], 7.5, t('X was computed and passed correctly'));
    $this->assertEqual($calls['crop'][0][2], 0, t('Y was computed and passed correctly'));
    $this->assertEqual($calls['crop'][0][3], 5, t('Width was computed and passed correctly'));
    $this->assertEqual($calls['crop'][0][4], 10, t('Height was computed and passed correctly'));
  }

  /**
   * Test the image_desaturate_effect() function.
   */
  function testDesaturateEffect() {
    $this->assertTrue(image_desaturate_effect($this->image, array()), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('desaturate'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual(count($calls['desaturate'][0]), 1, t('Only the image was passed.'));
  }

  /**
   * Test the image_rotate_effect() function.
   */
  function testRotateEffect() {
    // @todo: need to test with 'random' => TRUE
    $this->assertTrue(image_rotate_effect($this->image, array('degrees' => 90, 'bgcolor' => '#fff')), t('Function returned the expected value.'));
    $this->assertToolkitOperationsCalled(array('rotate'));

    // Check the parameters.
    $calls = image_test_get_all_calls();
    $this->assertEqual($calls['rotate'][0][1], 90, t('Degrees were passed correctly'));
    $this->assertEqual($calls['rotate'][0][2], 0xffffff, t('Background color was passed correctly'));
  }
}

/**
 * Tests creation, deletion, and editing of image styles and effects.
 */
class ImageAdminStylesUnitTest extends ImageFieldTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Image styles and effects UI configuration',
      'description' => 'Tests creation, deletion, and editing of image styles and effects at the UI level.',
      'group' => 'Image',
    );
  }

  /**
   * Given an image style, generate an image.
   */
  function createSampleImage($style) {
    static $file_path;

    // First, we need to make sure we have an image in our testing
    // file directory. Copy over an image on the first run.
    if (!isset($file_path)) {
      $files = $this->drupalGetTestFiles('image');
      $file = reset($files);
      $file_path = file_unmanaged_copy($file->uri);
    }

    return image_style_url($style['name'], $file_path) ? $file_path : FALSE;
  }

  /**
   * Count the number of images currently create for a style.
   */
  function getImageCount($style) {
    return count(file_scan_directory('public://styles/' . $style['name'], '/.*/'));
  }

  /**
   * Test creating an image style with a numeric name and ensuring it can be
   * applied to an image.
   */
  function testNumericStyleName() {
    $style_name = rand();
    $edit = array(
      'name' => $style_name,
    );
    $this->drupalPost('admin/config/media/image-styles/add', $edit, t('Create new style'));
    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), t('Image style successfully created.'));
    $options = image_style_options();
    $this->assertTrue(array_key_exists($style_name, $options), t('Array key %key exists.', array('%key' => $style_name)));
  }

  /**
   * General test to add a style, add/remove/edit effects to it, then delete it.
   */
  function testStyle() {
    // Setup a style to be created and effects to add to it.
    $style_name = strtolower($this->randomName(10));
    $style_path = 'admin/config/media/image-styles/edit/' . $style_name;
    $effect_edits = array(
      'image_resize' => array(
        'data[width]' => 100,
        'data[height]' => 101,
      ),
      'image_scale' => array(
        'data[width]' => 110,
        'data[height]' => 111,
        'data[upscale]' => 1,
      ),
      'image_scale_and_crop' => array(
        'data[width]' => 120,
        'data[height]' => 121,
      ),
      'image_crop' => array(
        'data[width]' => 130,
        'data[height]' => 131,
        'data[anchor]' => 'center-center',
      ),
      'image_desaturate' => array(
        // No options for desaturate.
      ),
      'image_rotate' => array(
        'data[degrees]' => 5,
        'data[random]' => 1,
        'data[bgcolor]' => '#FFFF00',
      ),
    );

    // Add style form.

    $edit = array(
      'name' => $style_name,
    );
    $this->drupalPost('admin/config/media/image-styles/add', $edit, t('Create new style'));
    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), t('Image style successfully created.'));

    // Add effect form.

    // Add each sample effect to the style.
    foreach ($effect_edits as $effect => $edit) {
      // Add the effect.
      $this->drupalPost($style_path, array('new' => $effect), t('Add'));
      if (!empty($edit)) {
        $this->drupalPost(NULL, $edit, t('Add effect'));
      }
    }

    // Edit effect form.

    // Revisit each form to make sure the effect was saved.
    drupal_static_reset('image_styles');
    $style = image_style_load($style_name);

    foreach ($style['effects'] as $ieid => $effect) {
      $this->drupalGet($style_path . '/effects/' . $ieid);
      foreach ($effect_edits[$effect['name']] as $field => $value) {
        $this->assertFieldByName($field, $value, t('The %field field in the %effect effect has the correct value of %value.', array('%field' => $field, '%effect' => $effect['name'], '%value' => $value)));
      }
    }

    // Image style overview form (ordering and renaming).

    // Confirm the order of effects is maintained according to the order we
    // added the fields.
    $effect_edits_order = array_keys($effect_edits);
    $effects_order = array_values($style['effects']);
    $order_correct = TRUE;
    foreach ($effects_order as $index => $effect) {
      if ($effect_edits_order[$index] != $effect['name']) {
        $order_correct = FALSE;
      }
    }
    $this->assertTrue($order_correct, t('The order of the effects is correctly set by default.'));

    // Test the style overview form.
    // Change the name of the style and adjust the weights of effects.
    $style_name = strtolower($this->randomName(10));
    $weight = count($effect_edits);
    $edit = array(
      'name' => $style_name,
    );
    foreach ($style['effects'] as $ieid => $effect) {
      $edit['effects[' . $ieid . '][weight]'] = $weight;
      $weight--;
    }

    // Create an image to make sure it gets flushed after saving.
    $image_path = $this->createSampleImage($style);
    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));

    $this->drupalPost($style_path, $edit, t('Update style'));

    // Note that after changing the style name, the style path is changed.
    $style_path = 'admin/config/media/image-styles/edit/' . $style_name;

    // Check that the URL was updated.
    $this->drupalGet($style_path);
    $this->assertResponse(200, t('Image style %original renamed to %new', array('%original' => $style['name'], '%new' => $style_name)));

    // Check that the image was flushed after updating the style.
    // This is especially important when renaming the style. Make sure that
    // the old image directory has been deleted.
    $this->assertEqual($this->getImageCount($style), 0, t('Image style %style was flushed after renaming the style and updating the order of effects.', array('%style' => $style['name'])));

    // Load the style by the new name with the new weights.
    drupal_static_reset('image_styles');
    $style = image_style_load($style_name);

    // Confirm the new style order was saved.
    $effect_edits_order = array_reverse($effect_edits_order);
    $effects_order = array_values($style['effects']);
    $order_correct = TRUE;
    foreach ($effects_order as $index => $effect) {
      if ($effect_edits_order[$index] != $effect['name']) {
        $order_correct = FALSE;
      }
    }
    $this->assertTrue($order_correct, t('The order of the effects is correctly set by default.'));

    // Image effect deletion form.

    // Create an image to make sure it gets flushed after deleting an effect.
    $image_path = $this->createSampleImage($style);
    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));

    // Test effect deletion form.
    $effect = array_pop($style['effects']);
    $this->drupalPost($style_path . '/effects/' . $effect['ieid'] . '/delete', array(), t('Delete'));
    $this->assertRaw(t('The image effect %name has been deleted.', array('%name' => $effect['label'])), t('Image effect deleted.'));

    // Style deletion form.

    // Delete the style.
    $this->drupalPost('admin/config/media/image-styles/delete/' . $style_name, array(), t('Delete'));

    // Confirm the style directory has been removed.
    $directory = file_default_scheme() . '://styles/' . $style_name;
    $this->assertFalse(is_dir($directory), t('Image style %style directory removed on style deletion.', array('%style' => $style['name'])));

    drupal_static_reset('image_styles');
    $this->assertFalse(image_style_load($style_name), t('Image style %style successfully deleted.', array('%style' => $style['name'])));

  }

  /**
   * Test deleting a style and choosing a replacement style.
   */
  function testStyleReplacement() {
    // Create a new style.
    $style_name = strtolower($this->randomName(10));
    image_style_save(array('name' => $style_name));
    $style_path = 'admin/config/media/image-styles/edit/' . $style_name;

    // Create an image field that uses the new style.
    $field_name = strtolower($this->randomName(10));
    $this->createImageField($field_name, 'article');
    $instance = field_info_instance('node', $field_name, 'article');
    $instance['display']['default']['type'] = 'image';
    $instance['display']['default']['settings']['image_style'] = $style_name;
    field_update_instance($instance);

    // Create a new node with an image attached.
    $test_image = current($this->drupalGetTestFiles('image'));
    $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
    $node = node_load($nid);

    // Test that image is displayed using newly created style.
    $this->drupalGet('node/' . $nid);
    $this->assertRaw(image_style_url($style_name, $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri']), t('Image displayed using style @style.', array('@style' => $style_name)));

    // Rename the style and make sure the image field is updated.
    $new_style_name = strtolower($this->randomName(10));
    $edit = array(
      'name' => $new_style_name,
    );
    $this->drupalPost('admin/config/media/image-styles/edit/' . $style_name, $edit, t('Update style'));
    $this->assertText(t('Changes to the style have been saved.'), t('Style %name was renamed to %new_name.', array('%name' => $style_name, '%new_name' => $new_style_name)));
    $this->drupalGet('node/' . $nid);
    $this->assertRaw(image_style_url($new_style_name, $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri']), t('Image displayed using style replacement style.'));

    // Delete the style and choose a replacement style.
    $edit = array(
      'replacement' => 'thumbnail',
    );
    $this->drupalPost('admin/config/media/image-styles/delete/' . $new_style_name, $edit, t('Delete'));
    $message = t('Style %name was deleted.', array('%name' => $new_style_name));
    $this->assertRaw($message, $message);

    $this->drupalGet('node/' . $nid);
    $this->assertRaw(image_style_url('thumbnail', $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri']), t('Image displayed using style replacement style.'));
  }
}

/**
 * Test class to check that formatters and display settings are working.
 */
class ImageFieldDisplayTestCase extends ImageFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Image field display tests',
      'description' => 'Test the display of image fields.',
      'group' => 'Image',
    );
  }

  function setUp() {
    parent::setUp(array('field_ui'));
  }

  /**
   * Test image formatters on node display for public files.
   */
  function testImageFieldFormattersPublic() {
    $this->_testImageFieldFormatters('public');
  }

  /**
   * Test image formatters on node display for private files.
   */
  function testImageFieldFormattersPrivate() {
    // Remove access content permission from anonymous users.
    user_role_change_permissions(DRUPAL_ANONYMOUS_RID, array('access content' => FALSE));
    $this->_testImageFieldFormatters('private');
  }

  /**
   * Test image formatters on node display.
   */
  function _testImageFieldFormatters($scheme) {
    $field_name = strtolower($this->randomName());
    $this->createImageField($field_name, 'article', array('uri_scheme' => $scheme));
    // Create a new node with an image attached.
    $test_image = current($this->drupalGetTestFiles('image'));
    $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
    $node = node_load($nid, NULL, TRUE);

    // Test that the default formatter is being used.
    $image_uri = $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri'];
    $image_info = array(
      'uri' => $image_uri,
      'width' => 40,
      'height' => 20,
    );
    $default_output = theme('image', $image_info);
    $this->assertRaw($default_output, t('Default formatter displaying correctly on full node view.'));

    // Test the image linked to file formatter.
    $instance = field_info_instance('node', $field_name, 'article');
    $instance['display']['default']['type'] = 'image';
    $instance['display']['default']['settings']['image_link'] = 'file';
    field_update_instance($instance);
    $default_output = l(theme('image', $image_info), file_create_url($image_uri), array('html' => TRUE));
    $this->drupalGet('node/' . $nid);
    $this->assertRaw($default_output, t('Image linked to file formatter displaying correctly on full node view.'));
    // Verify that the image can be downloaded.
    $this->assertEqual(file_get_contents($test_image->uri), $this->drupalGet(file_create_url($image_uri)), t('File was downloaded successfully.'));
    if ($scheme == 'private') {
      // Only verify HTTP headers when using private scheme and the headers are
      // sent by Drupal.
      $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png; name="' . $test_image->filename . '"', t('Content-Type header was sent.'));
      $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', t('Content-Disposition header was sent.'));
      $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'private', t('Cache-Control header was sent.'));

      // Log out and try to access the file.
      $this->drupalLogout();
      $this->drupalGet(file_create_url($image_uri));
      $this->assertResponse('403', t('Access denied to original image as anonymous user.'));

      // Log in again.
      $this->drupalLogin($this->admin_user);
    }

    // Test the image linked to content formatter.
    $instance['display']['default']['settings']['image_link'] = 'content';
    field_update_instance($instance);
    $default_output = l(theme('image', $image_info), 'node/' . $nid, array('html' => TRUE, 'attributes' => array('class' => 'active')));
    $this->drupalGet('node/' . $nid);
    $this->assertRaw($default_output, t('Image linked to content formatter displaying correctly on full node view.'));

    // Test the image style 'thumbnail' formatter.
    $instance['display']['default']['settings']['image_link'] = '';
    $instance['display']['default']['settings']['image_style'] = 'thumbnail';
    field_update_instance($instance);
    // Ensure the derivative image is generated so we do not have to deal with
    // image style callback paths.
    $this->drupalGet(image_style_url('thumbnail', $image_uri));
    $image_info['uri'] = image_style_path('thumbnail', $image_uri);
    $image_info['width'] = 100;
    $image_info['height'] = 50;
    $default_output = theme('image', $image_info);
    $this->drupalGet('node/' . $nid);
    $this->assertRaw($default_output, t('Image style thumbnail formatter displaying correctly on full node view.'));

    if ($scheme == 'private') {
      // Log out and try to access the file.
      $this->drupalLogout();
      $this->drupalGet(image_style_url('thumbnail', $image_uri));
      $this->assertResponse('403', t('Access denied to image style thumbnail as anonymous user.'));
    }
  }

  /**
   * Tests for image field settings.
   */
  function testImageFieldSettings() {
    $test_image = current($this->drupalGetTestFiles('image'));
    list(, $test_image_extension) = explode('.', $test_image->filename);
    $field_name = strtolower($this->randomName());
    $instance_settings = array(
      'alt_field' => 1,
      'file_extensions' => $test_image_extension,
      'max_filesize' => '50 KB',
      'max_resolution' => '100x100',
      'min_resolution' => '10x10',
      'title_field' => 1,
    );
    $widget_settings = array(
      'preview_image_style' => 'medium',
    );
    $field = $this->createImageField($field_name, 'article', array(), $instance_settings, $widget_settings);
    $field['deleted'] = 0;
    $table = _field_sql_storage_tablename($field);
    $schema = drupal_get_schema($table, TRUE);
    $instance = field_info_instance('node', $field_name, 'article');

    $this->drupalGet('node/add/article');
    $this->assertText(t('Files must be less than 50 KB.'), t('Image widget max file size is displayed on article form.'));
    $this->assertText(t('Allowed file types: ' . $test_image_extension . '.'), t('Image widget allowed file types displayed on article form.'));
    $this->assertText(t('Images must be between 10x10 and 100x100 pixels.'), t('Image widget allowed resolution displayed on article form.'));

    // We have to create the article first and then edit it because the alt
    // and title fields do not display until the image has been attached.
    $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
    $this->drupalGet('node/' . $nid . '/edit');
    $this->assertFieldByName($field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][alt]', '', t('Alt field displayed on article form.'));
    $this->assertFieldByName($field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][title]', '', t('Title field displayed on article form.'));
    // Verify that the attached image is being previewed using the 'medium'
    // style.
    $node = node_load($nid, NULL, TRUE);
    $image_info = array(
      'uri' => image_style_url('medium', $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri']),
      'width' => 220,
      'height' => 110,
    );
    $default_output = theme('image', $image_info);
    $this->assertRaw($default_output, t("Preview image is displayed using 'medium' style."));

    // Add alt/title fields to the image and verify that they are displayed.
    $image_info = array(
      'uri' => $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri'],
      'alt' => $this->randomName(),
      'title' => $this->randomName(),
      'width' => 40,
      'height' => 20,
    );
    $edit = array(
      $field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][alt]' => $image_info['alt'],
      $field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][title]' => $image_info['title'],
    );
    $this->drupalPost('node/' . $nid . '/edit', $edit, t('Save'));
    $default_output = theme('image', $image_info);
    $this->assertRaw($default_output, t('Image displayed using user supplied alt and title attributes.'));

    // Verify that alt/title longer than allowed results in a validation error.
    $test_size = 2000;
    $edit = array(
      $field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][alt]' => $this->randomName($test_size),
      $field_name . '[' . LANGUAGE_NOT_SPECIFIED . '][0][title]' => $this->randomName($test_size),
    );
    $this->drupalPost('node/' . $nid . '/edit', $edit, t('Save'));
    $this->assertRaw(t('Alternate text cannot be longer than %max characters but is currently %length characters long.', array(
      '%max' => $schema['fields'][$field_name .'_alt']['length'],
      '%length' => $test_size,
    )));
    $this->assertRaw(t('Title cannot be longer than %max characters but is currently %length characters long.', array(
      '%max' => $schema['fields'][$field_name .'_title']['length'],
      '%length' => $test_size,
    )));
  }

  /**
   * Test use of a default image with an image field.
   */
  function testImageFieldDefaultImage() {
    // Create a new image field.
    $field_name = strtolower($this->randomName());
    $this->createImageField($field_name, 'article');

    // Create a new node, with no images and verify that no images are
    // displayed.
    $node = $this->drupalCreateNode(array('type' => 'article'));
    $this->drupalGet('node/' . $node->nid);
    // Verify that no image is displayed on the page by checking for the class
    // that would be used on the image field.
    $this->assertNoPattern('<div class="(.*?)field-name-' . strtr($field_name, '_', '-') . '(.*?)">', t('No image displayed when no image is attached and no default image specified.'));

    // Add a default image to the public imagefield instance.
    $images = $this->drupalGetTestFiles('image');
    $edit = array(
      'files[field_settings_default_image]' => drupal_realpath($images[0]->uri),
    );
    $this->drupalPost('admin/structure/types/manage/article/fields/' . $field_name, $edit, t('Save settings'));
    // Clear field info cache so the new default image is detected.
    field_info_cache_clear();
    $field = field_info_field($field_name);
    $image = file_load($field['settings']['default_image']);
    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, t('The default image status is permanent.'));
    $default_output = theme('image', array('uri' => $image->uri));
    $this->drupalGet('node/' . $node->nid);
    $this->assertRaw($default_output, t('Default image displayed when no user supplied image is present.'));

    // Create a node with an image attached and ensure that the default image
    // is not displayed.
    $nid = $this->uploadNodeImage($images[1], $field_name, 'article');
    $node = node_load($nid, NULL, TRUE);
    $image_info = array(
      'uri' => $node->{$field_name}[LANGUAGE_NOT_SPECIFIED][0]['uri'],
      'width' => 40,
      'height' => 20,
    );
    $image_output = theme('image', $image_info);
    $this->drupalGet('node/' . $nid);
    $this->assertNoRaw($default_output, t('Default image is not displayed when user supplied image is present.'));
    $this->assertRaw($image_output, t('User supplied image is displayed.'));

    // Remove default image from the field and make sure it is no longer used.
    $edit = array(
      'field[settings][default_image][fid]' => 0,
    );
    $this->drupalPost('admin/structure/types/manage/article/fields/' . $field_name, $edit, t('Save settings'));
    // Clear field info cache so the new default image is detected.
    field_info_cache_clear();
    $field = field_info_field($field_name);
    $this->assertFalse($field['settings']['default_image'], t('Default image removed from field.'));
    // Create an image field that uses the private:// scheme and test that the
    // default image works as expected.
    $private_field_name = strtolower($this->randomName());
    $this->createImageField($private_field_name, 'article', array('uri_scheme' => 'private'));
    // Add a default image to the new field.
    $edit = array(
      'files[field_settings_default_image]' => drupal_realpath($images[1]->uri),
    );
    $this->drupalPost('admin/structure/types/manage/article/fields/' . $private_field_name, $edit, t('Save settings'));
    $private_field = field_info_field($private_field_name);
    $image = file_load($private_field['settings']['default_image']);
    $this->assertEqual('private', file_uri_scheme($image->uri), t('Default image uses private:// scheme.'));
    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, t('The default image status is permanent.'));
    // Create a new node with no image attached and ensure that default private
    // image is displayed.
    $node = $this->drupalCreateNode(array('type' => 'article'));
    $default_output = theme('image', array('uri' => $image->uri));
    $this->drupalGet('node/' . $node->nid);
    $this->assertRaw($default_output, t('Default private image displayed when no user supplied image is present.'));
  }
}

/**
 * Test class to check for various validations.
 */
class ImageFieldValidateTestCase extends ImageFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Image field validation tests',
      'description' => 'Tests validation functions such as min/max resolution.',
      'group' => 'Image',
    );
  }

  /**
   * Test min/max resolution settings.
   */
  function testResolution() {
    $field_name = strtolower($this->randomName());
    $min_resolution = 50;
    $max_resolution = 100;
    $instance_settings = array(
      'max_resolution' => $max_resolution . 'x' . $max_resolution,
      'min_resolution' => $min_resolution . 'x' . $min_resolution,
    );
    $this->createImageField($field_name, 'article', array(), $instance_settings);

    // We want a test image that is too small, and a test image that is too
    // big, so cycle through test image files until we have what we need.
    $image_that_is_too_big = FALSE;
    $image_that_is_too_small = FALSE;
    foreach ($this->drupalGetTestFiles('image') as $image) {
      $info = image_get_info($image->uri);
      if ($info['width'] > $max_resolution) {
        $image_that_is_too_big = $image;
      }
      if ($info['width'] < $min_resolution) {
        $image_that_is_too_small = $image;
      }
      if ($image_that_is_too_small && $image_that_is_too_big) {
        break;
      }
    }
    $nid = $this->uploadNodeImage($image_that_is_too_small, $field_name, 'article');
    $this->assertText(t('The specified file ' . $image_that_is_too_small->filename . ' could not be uploaded. The image is too small; the minimum dimensions are 50x50 pixels.'), t('Node save failed when minimum image resolution was not met.'));
    $nid = $this->uploadNodeImage($image_that_is_too_big, $field_name, 'article');
    $this->assertText(t('The image was resized to fit within the maximum allowed dimensions of 100x100 pixels.'), t('Image exceeding max resolution was properly resized.'));
  }
}

/**
 * Tests that images have correct dimensions when styled.
 */
class ImageDimensionsUnitTest extends WebTestBase {
  protected $profile = 'testing';

  public static function getInfo() {
    return array(
      'name' => 'Image dimensions',
      'description' => 'Tests that images have correct dimensions when styled.',
      'group' => 'Image',
    );
  }

  function setUp() {
    parent::setUp(array('image', 'image_module_test'));
  }

  /**
   * Test styled image dimensions cumulatively.
   */
  function testImageDimensions() {
    // Create a working copy of the file.
    $files = $this->drupalGetTestFiles('image');
    $file = reset($files);
    $original_uri = file_unmanaged_copy($file->uri, 'public://', FILE_EXISTS_RENAME);

    // Create a style.
    $style = image_style_save(array('name' => 'test'));
    $generated_uri = 'public://styles/test/public/'. drupal_basename($original_uri);
    $url = image_style_url('test', $original_uri);

    $variables = array(
      'style_name' => 'test',
      'uri' => $original_uri,
      'width' => 40,
      'height' => 20,
    );
    // Verify that the original image matches the hard-coded values.
    $image_info = image_get_info($original_uri);
    $this->assertEqual($image_info['width'], $variables['width']);
    $this->assertEqual($image_info['height'], $variables['height']);

    // Scale an image that is wider than it is high.
    $effect = array(
      'name' => 'image_scale',
      'data' => array(
        'width' => 120,
        'height' => 90,
        'upscale' => TRUE,
      ),
      'weight' => 0,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="120" height="60" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 120);
    $this->assertEqual($image_info['height'], 60);

    // Rotate 90 degrees anticlockwise.
    $effect = array(
      'name' => 'image_rotate',
      'data' => array(
        'degrees' => -90,
        'random' => FALSE,
      ),
      'weight' => 1,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="60" height="120" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 60);
    $this->assertEqual($image_info['height'], 120);

    // Scale an image that is higher than it is wide (rotated by previous effect).
    $effect = array(
      'name' => 'image_scale',
      'data' => array(
        'width' => 120,
        'height' => 90,
        'upscale' => TRUE,
      ),
      'weight' => 2,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="45" height="90" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 45);
    $this->assertEqual($image_info['height'], 90);

    // Test upscale disabled.
    $effect = array(
      'name' => 'image_scale',
      'data' => array(
        'width' => 400,
        'height' => 200,
        'upscale' => FALSE,
      ),
      'weight' => 3,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="45" height="90" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 45);
    $this->assertEqual($image_info['height'], 90);

    // Add a desaturate effect.
    $effect = array(
      'name' => 'image_desaturate',
      'data' => array(),
      'weight' => 4,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="45" height="90" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 45);
    $this->assertEqual($image_info['height'], 90);

    // Add a random rotate effect.
    $effect = array(
      'name' => 'image_rotate',
      'data' => array(
        'degrees' => 180,
        'random' => TRUE,
      ),
      'weight' => 5,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));


    // Add a crop effect.
    $effect = array(
      'name' => 'image_crop',
      'data' => array(
        'width' => 30,
        'height' => 30,
        'anchor' => 'center-center',
      ),
      'weight' => 6,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" width="30" height="30" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
    $image_info = image_get_info($generated_uri);
    $this->assertEqual($image_info['width'], 30);
    $this->assertEqual($image_info['height'], 30);

    // Rotate to a non-multiple of 90 degrees.
    $effect = array(
      'name' => 'image_rotate',
      'data' => array(
        'degrees' => 57,
        'random' => FALSE,
      ),
      'weight' => 7,
    );

    $effect = image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" alt="" />');
    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
    $this->drupalGet($url);
    $this->assertResponse(200, t('Image was generated at the URL.'));
    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));

    image_effect_delete('test', $effect);

    // Ensure that an effect with no dimensions callback unsets the dimensions.
    // This ensures compatibility with 7.0 contrib modules.
    $effect = array(
      'name' => 'image_module_test_null',
      'data' => array(),
      'weight' => 8,
    );

    image_effect_save('test', $effect);
    $img_tag = theme_image_style($variables);
    $this->assertEqual($img_tag, '<img src="' . $url . '" alt="" />');
  }
}

/**
 * Tests image_dimensions_scale().
 */
class ImageDimensionsScaleTestCase extends UnitTestBase {
  public static function getInfo() {
    return array(
      'name' => 'image_dimensions_scale()',
      'description' => 'Tests all control flow branches in image_dimensions_scale().',
      'group' => 'Image',
    );
  }

  /**
   * Tests all control flow branches in image_dimensions_scale().
   */
  function testImageDimensionsScale() {
    // Define input / output datasets to test different branch conditions.
    $test = array();

    // Test branch conditions:
    // - No height.
    // - Upscale, don't need to upscale.
    $tests[] = array(
      'input' => array(
        'dimensions' => array(
          'width' => 1000,
          'height' => 2000,
        ),
        'width' => 200,
        'height' => NULL,
        'upscale' => TRUE,
      ),
      'output' => array(
        'dimensions' => array(
          'width' => 200,
          'height' => 400,
        ),
        'return_value' => TRUE,
      ),
    );

    // Test branch conditions:
    // - No width.
    // - Don't upscale, don't need to upscale.
    $tests[] = array(
      'input' => array(
        'dimensions' => array(
          'width' => 1000,
          'height' => 800,
        ),
        'width' => NULL,
        'height' => 140,
        'upscale' => FALSE,
      ),
      'output' => array(
        'dimensions' => array(
          'width' => 175,
          'height' => 140,
        ),
        'return_value' => TRUE,
      ),
    );

    // Test branch conditions:
    // - Source aspect ratio greater than target.
    // - Upscale, need to upscale.
    $tests[] = array(
      'input' => array(
        'dimensions' => array(
          'width' => 8,
          'height' => 20,
        ),
        'width' => 200,
        'height' => 140,
        'upscale' => TRUE,
      ),
      'output' => array(
        'dimensions' => array(
          'width' => 56,
          'height' => 140,
        ),
        'return_value' => TRUE,
      ),
    );

    // Test branch condition: target aspect ratio greater than source.
    $tests[] = array(
      'input' => array(
        'dimensions' => array(
          'width' => 2000,
          'height' => 800,
        ),
        'width' => 200,
        'height' => 140,
        'upscale' => FALSE,
      ),
      'output' => array(
        'dimensions' => array(
          'width' => 200,
          'height' => 80,
        ),
        'return_value' => TRUE,
      ),
    );

    // Test branch condition: don't upscale, need to upscale.
    $tests[] = array(
      'input' => array(
        'dimensions' => array(
          'width' => 100,
          'height' => 50,
        ),
        'width' => 200,
        'height' => 140,
        'upscale' => FALSE,
      ),
      'output' => array(
        'dimensions' => array(
          'width' => 100,
          'height' => 50,
        ),
        'return_value' => FALSE,
      ),
    );

    foreach ($tests as $test) {
      // Process the test dataset.
      $return_value = image_dimensions_scale($test['input']['dimensions'], $test['input']['width'], $test['input']['height'], $test['input']['upscale']);

      // Check the width.
      $this->assertEqual($test['output']['dimensions']['width'], $test['input']['dimensions']['width'], t('Computed width (@computed_width) equals expected width (@expected_width)', array('@computed_width' => $test['output']['dimensions']['width'], '@expected_width' => $test['input']['dimensions']['width'])));

      // Check the height.
      $this->assertEqual($test['output']['dimensions']['height'], $test['input']['dimensions']['height'], t('Computed height (@computed_height) equals expected height (@expected_height)', array('@computed_height' => $test['output']['dimensions']['height'], '@expected_height' => $test['input']['dimensions']['height'])));

      // Check the return value.
      $this->assertEqual($test['output']['return_value'], $return_value, t('Correct return value.'));
    }
  }
}

/**
 * Tests default image settings.
 */
class ImageFieldDefaultImagesTestCase extends ImageFieldTestCase {

  public static function getInfo() {
    return array(
      'name' => 'Image field default images tests',
      'description' => 'Tests setting up default images both to the field and field instance.',
      'group' => 'Image',
    );
  }

  function setUp() {
    parent::setUp(array('field_ui'));
  }

  /**
   * Tests CRUD for fields and fields instances with default images.
   */
  function testDefaultImages() {
    // Create files to use as the default images.
    $files = $this->drupalGetTestFiles('image');
    $default_images = array();
    foreach (array('field', 'instance', 'instance2', 'field_new', 'instance_new') as $image_target) {
      $file = array_pop($files);
      $file = file_save($file);
      $default_images[$image_target] = $file;
    }

    // Create an image field and add an instance to the article content type.
    $field_name = strtolower($this->randomName());
    $field_settings = array(
      'default_image' => $default_images['field']->fid,
    );
    $instance_settings = array(
      'default_image' => $default_images['instance']->fid,
    );
    $widget_settings = array(
      'preview_image_style' => 'medium',
    );
    $this->createImageField($field_name, 'article', $field_settings, $instance_settings, $widget_settings);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, 'article');

    // Add another instance with another default image to the page content type.
    $instance2 = array_merge($instance, array(
      'bundle' => 'page',
      'settings' => array(
        'default_image' => $default_images['instance2']->fid,
      ),
    ));
    field_create_instance($instance2);
    $instance2 = field_info_instance('node', $field_name, 'page');


    // Confirm the defaults are present on the article field admin form.
    $this->drupalGet("admin/structure/types/manage/article/fields/$field_name");
    $this->assertFieldByXpath(
      '//input[@name="field[settings][default_image][fid]"]',
      $default_images['field']->fid,
      format_string(
        'Article image field default equals expected file ID of @fid.',
        array('@fid' => $default_images['field']->fid)
      )
    );
    $this->assertFieldByXpath(
      '//input[@name="instance[settings][default_image][fid]"]',
      $default_images['instance']->fid,
      format_string(
        'Article image field instance default equals expected file ID of @fid.',
        array('@fid' => $default_images['instance']->fid)
      )
    );

    // Confirm the defaults are present on the page field admin form.
    $this->drupalGet("admin/structure/types/manage/page/fields/$field_name");
    $this->assertFieldByXpath(
      '//input[@name="field[settings][default_image][fid]"]',
      $default_images['field']->fid,
      format_string(
        'Page image field default equals expected file ID of @fid.',
        array('@fid' => $default_images['field']->fid)
      )
    );
    $this->assertFieldByXpath(
      '//input[@name="instance[settings][default_image][fid]"]',
      $default_images['instance2']->fid,
      format_string(
        'Page image field instance default equals expected file ID of @fid.',
        array('@fid' => $default_images['instance2']->fid)
      )
    );

    // Confirm that the image default is shown for a new article node.
    $article = $this->drupalCreateNode(array('type' => 'article'));
    $article_built = node_view($article);
    $this->assertEqual(
      $article_built[$field_name]['#items'][0]['fid'],
      $default_images['instance']->fid,
      format_string(
        'A new article node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance']->fid)
      )
    );

    // Confirm that the image default is shown for a new page node.
    $page = $this->drupalCreateNode(array('type' => 'page'));
    $page_built = node_view($page);
    $this->assertEqual(
      $page_built[$field_name]['#items'][0]['fid'],
      $default_images['instance2']->fid,
      format_string(
        'A new page node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance2']->fid)
      )
    );

    // Upload a new default for the field.
    $field['settings']['default_image'] = $default_images['field_new']->fid;
    field_update_field($field);

    // Confirm that the new field default is used on the article admin form.
    $this->drupalGet("admin/structure/types/manage/article/fields/$field_name");
    $this->assertFieldByXpath(
      '//input[@name="field[settings][default_image][fid]"]',
      $default_images['field_new']->fid,
      format_string(
        'Updated image field default equals expected file ID of @fid.',
        array('@fid' => $default_images['field_new']->fid)
      )
    );

    // Reload the nodes and confirm the field instance defaults are used.
    $article_built = node_view($article = node_load($article->nid, NULL, $reset = TRUE));
    $page_built = node_view($page = node_load($page->nid, NULL, $reset = TRUE));
    $this->assertEqual(
      $article_built[$field_name]['#items'][0]['fid'],
      $default_images['instance']->fid,
      format_string(
        'An existing article node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance']->fid)
      )
    );
    $this->assertEqual(
      $page_built[$field_name]['#items'][0]['fid'],
      $default_images['instance2']->fid,
      format_string(
        'An existing page node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance2']->fid)
      )
    );

    // Upload a new default for the article's field instance.
    $instance['settings']['default_image'] = $default_images['instance_new']->fid;
    field_update_instance($instance);

    // Confirm the new field instance default is used on the article field
    // admin form.
    $this->drupalGet("admin/structure/types/manage/article/fields/$field_name");
    $this->assertFieldByXpath(
      '//input[@name="instance[settings][default_image][fid]"]',
      $default_images['instance_new']->fid,
      format_string(
        'Updated article image field instance default equals expected file ID of @fid.',
        array('@fid' => $default_images['instance_new']->fid)
      )
    );

    // Reload the nodes.
    $article_built = node_view($article = node_load($article->nid, NULL, $reset = TRUE));
    $page_built = node_view($page = node_load($page->nid, NULL, $reset = TRUE));

    // Confirm the article uses the new default.
    $this->assertEqual(
      $article_built[$field_name]['#items'][0]['fid'],
      $default_images['instance_new']->fid,
      format_string(
        'An existing article node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance_new']->fid)
      )
    );
    // Confirm the page remains unchanged.
    $this->assertEqual(
      $page_built[$field_name]['#items'][0]['fid'],
      $default_images['instance2']->fid,
      format_string(
        'An existing page node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance2']->fid)
      )
    );

    // Remove the instance default from articles.
    $instance['settings']['default_image'] = NULL;
    field_update_instance($instance);

    // Confirm the article field instance default has been removed.
    $this->drupalGet("admin/structure/types/manage/article/fields/$field_name");
    $this->assertFieldByXpath(
      '//input[@name="instance[settings][default_image][fid]"]',
      '',
      'Updated article image field instance default has been successfully removed.'
    );

    // Reload the nodes.
    $article_built = node_view($article = node_load($article->nid, NULL, $reset = TRUE));
    $page_built = node_view($page = node_load($page->nid, NULL, $reset = TRUE));
    // Confirm the article uses the new field (not instance) default.
    $this->assertEqual(
      $article_built[$field_name]['#items'][0]['fid'],
      $default_images['field_new']->fid,
      format_string(
        'An existing article node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['field_new']->fid)
      )
    );
    // Confirm the page remains unchanged.
    $this->assertEqual(
      $page_built[$field_name]['#items'][0]['fid'],
      $default_images['instance2']->fid,
      format_string(
        'An existing page node without an image has the expected default image file ID of @fid.',
        array('@fid' => $default_images['instance2']->fid)
      )
    );
  }

}
