/**
* @dataProvider get_first_content_image_provider
*/
public function test_get_first_content_image($expected_value, $post_content)
{
$post_id = $this->factory->post->create(array('post_content' => $post_content));
$post = new BasePost($post_id);
$this->assertEquals($expected_value, $post->get_first_content_image());
}