public async Task GetNumberOfGreetingsShouldReturnSomeNumberTest()
{
var action = A.Fake <IGetTotalNumberOfGreetingsAction>();
A.CallTo(() => action.Execute()).Returns(6);
var actionFactory = A.Fake <IActionFactory>();
A.CallTo(() => actionFactory.CreateGetTotalNumberOfGreetingsAction()).Returns(action);
var sut = new HelloWorldController(actionFactory);
var response = await sut.GetTotalNumberOfGreetings();
var okResponse = response.As <OkObjectResult>();
okResponse.Should().NotBeNull();
okResponse.StatusCode.Should().Be((int)HttpStatusCode.OK);
var content = okResponse.Value.As <int>();
content.Should().Be(6);
}