public async Task TestListOfHighestGrossingFromFakeData()
{
//AAA
//Arrange, Act, Assert
//SUT(System Under Test) MovieService -> GetTopRevenueMovies
//Arrange
//process of mocking objects/data/methods...
//_sut = new MovieServices(new MockMovieRepo());
//Act
var movies = await _sut.GetTopRevenueMovies();
//check the actual output with expected value
//Assert
Assert.IsNotNull(movies);
Assert.IsInstanceOfType(movies, typeof(IEnumerable <MovieResponseModel>));
Assert.AreEqual(16, movies.Count());
}