public async Task DeleteEmployeeAsync_ValidInput_ReturnsOkObjectResult() { //Arrange int Id = 1; _mockEmployeeManager.Setup(x => x.DeleteEmployeeAsync(Id)).ReturnsAsync(true); //Act var result = await _employeeController.DeleteEmployeeAsync(Id) as OkObjectResult; //Assert Assert.IsNotNull(result.Value); Assert.IsInstanceOfType(result, typeof(OkObjectResult)); }