public function testCreatePostAddTagValuesAsArray()
 {
     $post = new Post(['title' => 'New post title', 'body' => 'New post body']);
     $post->addTagValues(['tag 4', 'tag  4', 'tag 5', '', 'tag 6']);
     $this->assertTrue($post->save());
     $dataSet = $this->getConnection()->createDataSet(['post', 'tag', 'post_tag_assn']);
     $expectedDataSet = $this->createFlatXMLDataSet(__DIR__ . '/data/test-create-post-add-tag-values.xml');
     $this->assertDataSetsEqual($expectedDataSet, $dataSet);
 }