public void WhenCalledWithValidInput_GetEmployeesForEmployer_ReturnsOkResult()
        {
            //Arrange
            var mockServiceResponse = new List <Employee>
            {
                new Employee
                {
                    FirstName = "Adam",
                    LastName  = "Carter"
                }
            };

            var inputEmployeeId = 1234;

            mockEmployeeService.Setup(s => s.GetEmployeesForEmployer(inputEmployeeId)).Returns(mockServiceResponse);

            //Act
            var actualResult = employerController.GetEmployeesForEmployer(inputEmployeeId);


            //Assert
            var okResult = actualResult.Result as OkObjectResult;

            Assert.IsNotNull(okResult);
            Assert.AreEqual(200, okResult.StatusCode);
            var employersList = okResult.Value as List <Employee>;

            Assert.AreEqual(1, employersList.Count);
        }