public void Given_postId_When_BuildAllCommentsViewModel_Returns_AllCommentsViewModel()
{
//Given
int postId = 1;
//When
var result = _postBuilder.BuildAllCommentsViewModel(postId);
//Then
Assert.NotNull(result);
Assert.AreEqual(2, result.CommentList.Count);
Assert.IsInstanceOf <AllCommentsViewModel>(result);
}