Tests getting processed property values via a computed property.
public function testComputedProperties() {
  // Make the test text field processed.
  $instance = field_info_instance('entity_test', 'field_test_text', 'entity_test');
  $instance['settings']['text_processing'] = 1;
  field_update_instance($instance);
  $entity = $this
    ->createTestEntity();
  $entity->field_test_text->value = "The <strong>text</strong> text to filter.";
  $entity->field_test_text->format = filter_default_format();
  $target = "<p>The <strong>text</strong> text to filter.</p>\n";
  $this
    ->assertEqual($entity->field_test_text->processed, $target, 'Text is processed with the default filter.');
  // Save and load entity and make sure it still works.
  $entity
    ->save();
  $entity = entity_load('entity_test', $entity
    ->id());
  $this
    ->assertEqual($entity->field_test_text->processed, $target, 'Text is processed with the default filter.');
}