public async Task GetFavoriteVendors_ReturnVendors() { //arrange Favorite fav1 = new Favorite() { userName = "******", vendorId = 0 }; Favorite fav2 = new Favorite() { userName = "******", vendorId = 1 }; Favorite fav3 = new Favorite() { userName = "******", vendorId = 2 }; var favorites = new List <Favorite> { fav1, fav2, fav3 }; Vendor v1 = new Vendor() { id = 0, userName = "******", name = "name0", website = "website_0" }; Vendor v2 = new Vendor() { id = 1, userName = "******", name = "name1", website = "website_1" }; Vendor v3 = new Vendor() { id = 2, userName = "******", name = "name2", website = "website_2" }; var vendors = new List <Vendor> { v1, v2, v3 }; _favoritesQueryMock.Setup(x => x.GetAllByUserName("aml5071")) .Returns(Task.Factory.StartNew(() => favorites)); _vendorsQueryMock.Setup(x => x.GetById(It.IsAny <int>())) .Returns((int i) => Task.Factory.StartNew(() => vendors[i])); //act var task = await _uut.GetFavoriteVendors("aml5071"); //assert Assert.IsType <OkObjectResult>(task); var result = task as OkObjectResult; var vendorsResult = result.Value as List <Vendor>; Assert.Equal(vendors, vendorsResult); }