public void GetBikeByID_ReturnsOneBike() { //Arrange _mockQueries.Setup(x => x.GetBikeByID(It.IsAny <int>())).Returns(_bike); var bikeService = new BikeService(_mockQueries.Object, _mockStorage.Object); //Act var result = bikeService.GetBikeByID(1); //Assert Assert.IsInstanceOfType(result, typeof(Bike)); _mockQueries.Verify(x => x.GetBikeByID(It.IsAny <int>()), Times.Once); }