Issue #2034977 by linclark: Create a base class for formatter RDFa tests.

core/modules/rdf/lib/Drupal/rdf/Tests/Field/FieldRdfaTestBase.php

@@ -0,0 +1,100 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\rdf\Tests\Field\FieldRdfaTestBase.
+ */
+
+namespace Drupal\rdf\Tests\Field;
+
+use Drupal\field\Tests\FieldUnitTestBase;
+
+abstract class FieldRdfaTestBase extends FieldUnitTestBase {
+
+  /**
+   * The machine name of the field type to test.
+   *
+   * @var string
+   */
+  protected $fieldType;
+
+  /**
+   * The name of the field to create for testing.
+   *
+   * @var string
+   */
+  protected $fieldName = 'field_test';
+
+  /**
+   * The URI to identify the entity.
+   *
+   * @var string
+   */
+  protected $uri = 'http://ex.com';
+
+  /**
+   * The entity to render for testing.
+   *
+   * @var \Drupal\Core\Entity\EntityNG
+   */
+  protected $entity;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('rdf');
+
+  /**
+   * Helper function to test the formatter's RDFa.
+   *
+   * @param string $formatter
+   *   The machine name of the formatter to test.
+   * @param string $property
+   *   The property that should be found.
+   * @param string $value
+   *   The expected value of the property.
+   * @param string $object_type
+   *   The object's type, either 'uri' or 'literal'.
+   */
+  protected function assertFormatterRdfa($formatter, $property, $value, $object_type = 'literal') {
+    $build = field_view_field($this->entity, $this->fieldName, array('type' => $formatter));
+    $rendered = "<div about='$this->uri'>" . drupal_render($build) . '</div>';
+    $graph = new \EasyRdf_Graph($this->uri, $rendered, 'rdfa');
+
+    $expected_value = array(
+      'type' => $object_type,
+      'value' => $value,
+    );
+    $this->assertTrue($graph->hasProperty($this->uri, $property, $expected_value), "Formatter $formatter exposes data correctly for {$this->fieldType} fields.");
+  }
+
+  /**
+   * Creates the field for testing.
+   */
+  protected function createTestField() {
+    entity_create('field_entity', array(
+      'field_name' => $this->fieldName,
+      'type' => $this->fieldType,
+    ))->save();
+    entity_create('field_instance', array(
+      'entity_type' => 'entity_test',
+      'field_name' => $this->fieldName,
+      'bundle' => 'entity_test',
+    ))->save();
+  }
+
+  /**
+   * Gets the absolute URI of an entity.
+   *
+   * @param \Drupal\Core\Entity\EntityNG $entity
+   *   The entity for which to generate the URI.
+   *
+   * @return string
+   *   The absolute URI.
+   */
+  protected function getAbsoluteUri($entity) {
+    $uri_info = $entity->uri();
+    return url($uri_info['path'], array('absolute' => TRUE));
+  }
+}