public void Validate_returns_JsonResult()
{
var viewModel = new PostViewModel();
var mockValidator = new Mock<ICodeValidator>();
var repository = Mock.Of<IPostRepository>();
mockValidator.Setup(x => x.GetCompilationErrors(It.IsAny<Post>()));
var controller = new HomeController(repository, mockValidator.Object);
var result = controller.Validate(viewModel) as JsonResult;
Assert.NotNull(result);
mockValidator.Verify(x => x.GetCompilationErrors(It.IsAny<Post>()), Times.Once());
}