public function testPostHasTranslation()
 {
     $post = new Post();
     $this->assertFalse($post->hasTranslation());
     $this->assertFalse($post->hasTranslation('en-US'));
     $post = Post::findOne(2);
     $this->assertTrue($post->hasTranslation());
     $this->assertTrue($post->hasTranslation('en-US'));
     $this->assertTrue($post->hasTranslation('de-DE'));
     $this->assertTrue($post->hasTranslation('ru-RU'));
 }