public void CalculateTrolley_ReturnsOk_WithDecimal() { _mockManager.Setup(x => x.CalculateTrolleyTotalAsync(It.IsAny <TrolleyVM>())) .ReturnsAsync((decimal)40.5); IActionResult result = _controller.CalculateTrolley(GetTrolley()); var objectResult = Assert.IsType <OkObjectResult>(result); Assert.IsType <decimal>(objectResult.Value); }