public void VerifyThatAttachMethodIsCalled_WhenIdIsPassed()
{
// Arrange
var postId = 1;
var post = new Post()
{
Id = postId
};
var postRepoMock = new Mock <IEfDeletableEntityRepository <Post> >();
var userServiceMock = new Mock <IUserService>();
var postService = new PostService(postRepoMock.Object, userServiceMock.Object);
// Act
postService.Attach(post);
// Assert
postRepoMock.Verify(m => m.Attach(It.Is <Post>(x => x.Id == post.Id)), Times.Once);
}