public void ShouldGetPostContentsByPost()
{
var postContents = _postContents.Where(a => a.PostId == 1).ToList();
_postContentRepository = new Mock<IPostContentRepository>();
_postContentRepository.Setup(a => a.Find(It.IsAny<Expression<Func<PostContent, bool>>>(), true))
.Returns(postContents);
_postContentsLogic = new PostContentsLogic(_postContentRepository.Object);
var contents = _postContentsLogic.GetByPostId(1);
Assert.AreEqual(2, contents.Count);
Assert.AreEqual(1, contents[0].PostId);
Assert.AreEqual(1, contents[1].PostId);
}