--- /dev/null
+<?php
+
+namespace Drupal\Tests\rdf\Functional;
+
+use Drupal\image\Entity\ImageStyle;
+use Drupal\Tests\image\Functional\ImageFieldTestBase;
+use Drupal\node\Entity\Node;
+use Drupal\file\Entity\File;
+use Drupal\Tests\TestFileCreationTrait;
+
+/**
+ * Tests the RDFa markup of imagefields.
+ *
+ * @group rdf
+ */
+class ImageFieldAttributesTest extends ImageFieldTestBase {
+
+ use TestFileCreationTrait {
+ getTestFiles as drupalGetTestFiles;
+ }
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['rdf', 'image'];
+
+ /**
+ * The name of the image field used in the test.
+ *
+ * @var string
+ */
+ protected $fieldName;
+
+ /**
+ * The file object used in the test.
+ *
+ * @var \Drupal\file\FileInterface
+ */
+ protected $file;
+
+ /**
+ * The node object used in the test.
+ *
+ * @var \Drupal\node\NodeInterface
+ */
+ protected $node;
+
+ protected function setUp() {
+ parent::setUp();
+
+ $this->fieldName = 'field_image';
+
+ // Create the image field.
+ $this->createImageField($this->fieldName, 'article');
+
+ // Set the RDF mapping for the new field.
+ rdf_get_mapping('node', 'article')
+ ->setFieldMapping($this->fieldName, [
+ 'properties' => ['og:image'],
+ 'mapping_type' => 'rel',
+ ])
+ ->setBundleMapping(['types' => []])
+ ->save();
+
+ // Get the test image that simpletest provides.
+ $image = current($this->drupalGetTestFiles('image'));
+
+ // Save a node with the image.
+ $nid = $this->uploadNodeImage($image, $this->fieldName, 'article', $this->randomMachineName());
+ $this->node = Node::load($nid);
+ $this->file = File::load($this->node->{$this->fieldName}->target_id);
+ }
+
+ /**
+ * Tests that image fields in teasers have correct resources.
+ */
+ public function testNodeTeaser() {
+ // Set the display options for the teaser.
+ $display_options = [
+ 'type' => 'image',
+ 'settings' => ['image_style' => 'medium', 'image_link' => 'content'],
+ ];
+ $display = entity_get_display('node', 'article', 'teaser');
+ $display->setComponent($this->fieldName, $display_options)
+ ->save();
+
+ // Render the teaser.
+ $node_render_array = node_view($this->node, 'teaser');
+ $html = \Drupal::service('renderer')->renderRoot($node_render_array);
+
+ // Parse the teaser.
+ $parser = new \EasyRdf_Parser_Rdfa();
+ $graph = new \EasyRdf_Graph();
+ $base_uri = \Drupal::url('<front>', [], ['absolute' => TRUE]);
+ $parser->parse($graph, $html, 'rdfa', $base_uri);
+
+ // Construct the node and image URIs for testing.
+ $node_uri = $this->node->url('canonical', ['absolute' => TRUE]);
+ $image_uri = ImageStyle::load('medium')->buildUrl($this->file->getFileUri());
+
+ // Test relations from node to image.
+ $expected_value = [
+ 'type' => 'uri',
+ 'value' => $image_uri,
+ ];
+ $this->assertTrue($graph->hasProperty($node_uri, 'http://ogp.me/ns#image', $expected_value), 'Node to file relation found in RDF output (og:image).');
+
+ // Test image type.
+ $expected_value = [
+ 'type' => 'uri',
+ 'value' => 'http://xmlns.com/foaf/0.1/Image',
+ ];
+ $this->assertTrue($graph->hasProperty($image_uri, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type', $expected_value), 'Image type found in RDF output (foaf:Image).');
+ }
+
+}