.NET核心单元测试剃刀页面RedirectToPage（）

Question

我正在使用MSTest和Moq编写以下Razor Page处理程序方法的单元测试：

public async Task<IActionResult> OnPostAsync()
{
    if (ModelState.IsValid)
    {
        var user = await _userManager.FindByEmailAsync(Input.Email);

        if (user == null)
        {
            return Page();
        }

        // Trying to unit test this code here
        if (!await _userManager.IsEmailConfirmedAsync(user))
        {
            return RedirectToPage("/Account/EmailNotConfirmed");
        }

        var code = await _userManager.GeneratePasswordResetTokenAsync(user);
        code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));
        var callbackUrl = Url.ResetPasswordCallbackLink(user.Id.ToString(), code, Request.Scheme);
        var callbackLink = HtmlEncoder.Default.Encode(callbackUrl);

        await _emailService.SendRazorTemplateEmailAsync(Input.Email, EmailTemplate.ResetPassword, new {Link = callbackUrl});

        return RedirectToPage("/Account/ForgotPasswordSuccess", new { email = Input.Email });
    }

    return Page();
}

我正在尝试为其中await _userManager.IsEmailConfirmedAsync(user)返回false和RedirectToPage()的代码块编写单元测试。这是我的单元测试代码：

private Mock<IEmailService>  _emailService;
private Mock<ILogger<ForgotPasswordModel>>  _logger;
private Mock<UserManager<ApplicationUser>> _userManager;
private Mock<IUserStore<ApplicationUser>> _userStore;
private ForgotPasswordModel _pageModel;

public ForgotPasswordTests()
{
    _emailService = new Mock<IEmailService>();
    _logger = new Mock<ILogger<ForgotPasswordModel>>();
    _userStore = new Mock<IUserStore<ApplicationUser>>();
    _userManager = new Mock<UserManager<ApplicationUser>>(_userStore.Object, null, null, null, null, null, null, null, null);
    _pageModel = new ForgotPasswordModel(_emailService.Object, _logger.Object, _userManager.Object);
}

[TestMethod]
public async Task OnPostAsync_WhenUserHasNotConfirmedEmail_RedirectsToCorrectPage()
{
    // Arrange
    _pageModel.Input = new ForgotPasswordPageModel() { Email = "johndoe@email.com" };
    _userManager.Setup(x => x.FindByEmailAsync(It.IsAny<string>())).ReturnsAsync(new ApplicationUser());
    _userManager.Setup(x => x.IsEmailConfirmedAsync(It.IsAny<ApplicationUser>())).ReturnsAsync(false);

    // Act
    var result = await _pageModel.OnPostAsync();

    // Assert
    Assert.IsInstanceOfType(result, typeof(RedirectToPageResult));
    Assert.AreEqual("/Account/EmailNotConfirmed", result.PageName); //<-- Error Here
}

我正在尝试编写一条Assert语句来测试它是否重定向到正确的页面。当我调试单元测试时，我可以看到：

PageName = /Account/EmailNotConfirmed，但是当我尝试以此做出Assert语句时，出现以下错误：

'IActionResult' does not contain a definition for 'PageName' and no accessible extension method 'PageName' accepting a first argument of type 'IActionResult' could be found

我在做什么错了？

Answer 1

您需要将结果转换为适当的类型，才能访问所需的成员

//...

// Act
IActionResult result = await _pageModel.OnPostAsync();

// Assert
Assert.IsInstanceOfType(result, typeof(RedirectToPageResult));
RedirectToPageResult redirect = result as RedirectToPageResult; //<--cast here
Assert.AreEqual("/Account/EmailNotConfirmed", redirect.PageName);