我目前正在单元测试中,当发送无效的表单收集数据时会引发错误。

异常在HttpPost Index ActionResult方法中引发,如下所示:

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Index(FormCollection formCollection, PaymentType payType, string progCode)
    {
        ActionResult ar = redirectFromButtonData(formCollection, payType, progCode);

        if (ar != null)
        {
            return ar;
        }
        else
        {
            throw new Exception("Cannot redirect to payment form from cohort decision - Type:[" +  payType.ToString()  + "] Prog:[" +  Microsoft.Security.Application.Encoder.HtmlEncode(progCode) + "]");
        }
    }


到目前为止,我已经编写了一个成功击中该异常的测试(我已经通过启用代码覆盖率来验证这一点,我已经使用该代码覆盖率来查看每个测试正在执行的代码),但是当前该测试失败了,因为我尚未定义一种测试是否引发异常的方法,可以在下面找到该测试的代码:

    [TestMethod]
    public void Error_Is_Thrown_If_HVM_FormCollection_Data_Is_Incorrect()
    {
        var formCollection = new FormCollection();
        formCollection.Add("__RequestVerificationToken", "__RequestVerificationToken");
        formCollection.Add("invalid - invalid", "invalid- invalid");


        var payType = new PaymentType();
        payType = PaymentType.deposit;

        var progCode = "hvm";

        var mocks = new MockRepository();

        var httpRequest = mocks.DynamicMock<HttpRequestBase>();
        var httpContext = mocks.DynamicMock<HttpContextBase>();
        controller.ControllerContext = new ControllerContext(httpContext, new RouteData(), controller);
        mocks.ReplayAll();

        httpRequest.Expect(r => r.Url).Return(new Uri("http://localhost:8080/hvm/full/self/")).Repeat.Any();

        httpContext.Expect(c => c.Request).Return(httpRequest).Repeat.Any();

        var result = controller.Index(formCollection, payType, progCode);
    }


我已经看过使用[ExpectedException(typeof(Exception)]注释可以在这种情况下使用吗?

最佳答案

我自由地更改了您的测试代码,使其略微符合犀牛的最新功能。不再需要创建MockRepository,可以使用静态类MockRepository并调用GenerateMock<>。我还将您的SuT(测试中的系统)实例化移动到了针对您模拟对象的规范之下。

Nunit的示例(我对Nunit的体验比对MSTest的体验更好。主要是因为Nunit的发布频率更高,并且具有更可靠的功能集。同样,不确定它是否可以与TFS一起使用,但是应该不难发现)。

[Test] // Nunit
[ExpectedException(typeof(Exception)) // NOTE: it's wise to throw specific
// exceptions so that you prevent false-positives! (another "exception"
// might make the test pass while it's a completely different scenario)
public void Error_Is_Thrown_If_HVM_FormCollection_Data_Is_Incorrect()
{
    var formCollection = new FormCollection();
    formCollection.Add("__RequestVerificationToken", "__RequestVerificationToken");
    formCollection.Add("invalid - invalid", "invalid- invalid");

    var payType = new PaymentType();
    payType = PaymentType.deposit;

    var progCode = "hvm";

    var httpRequest = MockRepository.GenerateMock<HttpRequestBase>();
    var httpContext = MockRepository.GenerateMock<HttpContextBase>();

    // define behaviour
    httpRequest.Expect(r => r.Url).Return(new Uri("http://localhost:8080/hvm/full/self/")).Repeat.Any();
    httpContext.Expect(c => c.Request).Return(httpRequest).Repeat.Any();

    // instantiate SuT (system under test)
    controller.ControllerContext = new ControllerContext(httpContext, new RouteData(), controller);

    // Test the stuff, and if nothing is thrown then the test fails
    var result = controller.Index(formCollection, payType, progCode);
}


与MStest几乎相同,所不同的是,您需要定义期望的异常,但需要多一些旧知识。

[TestMethod] // MStest
public void Error_Is_Thrown_If_HVM_FormCollection_Data_Is_Incorrect()
{
    try
    {
        var formCollection = new FormCollection();
        formCollection.Add("__RequestVerificationToken", "__RequestVerificationToken");
        formCollection.Add("invalid - invalid", "invalid- invalid");

        var payType = new PaymentType();
        payType = PaymentType.deposit;

        var progCode = "hvm";

        var httpRequest = MockRepository.GenerateMock<HttpRequestBase>();
        var httpContext = MockRepository.GenerateMock<HttpContextBase>();

        // define behaviour
        httpRequest.Expect(r => r.Url).Return(new Uri("http://localhost:8080/hvm/full/self/")).Repeat.Any();
        httpContext.Expect(c => c.Request).Return(httpRequest).Repeat.Any();

        // instantiate SuT (system under test)
        controller.ControllerContext = new ControllerContext(httpContext, new RouteData(), controller);

        // Test the stuff, and if nothing is thrown then the test fails
        var result = controller.Index(formCollection, payType, progCode);
    }
    catch (Exception)
    {
        Assert.Pass();
    }
    Assert.Fail("Expected exception Exception, was not thrown");
}


如果该部分正常工作,则可以通过提供的链接进行重构,以实现更好的可重用性:Assert exception from NUnit to MS TEST

10-05 21:09
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