public async Task GetInstructionByControl_ShouldReturnOkNegotiatedContentResult() { //Arrange _mockUnitOfWork.Setup(uw => uw.QualityControlRepository .GetWithDetailsAsync(It.IsAny <int>())) .Returns(Task.FromResult(control)); //Act var result = await _controller.GetByProduct(1); //Assert result.Should().BeOfType <OkNegotiatedContentResult <ICollection <Instruction> > >(); }