Asp.Net MVC 项目中的单元测试

Question

I am a newbie to write a unit testing please provide the guidance on what is the unit test for the following simple structure which may be passed in TestResult in VS 2019???

public ActionResult About()
{
    ViewBag.Message = "Your application description page.";
    return View();
}

Answer 1

Based on the shown example, inspect the view result to assert the expected behavior when About is invoked.

A very simplified example

[TestMethod]
public void AboutTest() {
    //Arrange
    var controller = new MyController();
    string expected = "Put expected message here";

    //Act
    var result = controller.About() as ViewResult;
    var actual = (string) result.ViewData["Message"];

    //Assert
    Assert.AreEqual(expected, actual);
}

The ViewBag data can be extracted from the ViewResult.ViewData collection as shown above.

Note the use of the matching name of the dynamic property set in the controller action.