Question

作为单元测试的一部分，我尝试创建一个包含HTTP表单数据的模拟IOwinRequest作为其主体。有问题的代码适用于生产（我可以通过Web浏览器发送的请求成功读取表单数据），但我无法理解我在单元测试中遇到的错误：

[TestMethod]
public async Task TestPostData()
{
    String rawFormData = "test=testValue&test2=testValue2";
    MemoryStream stream = new MemoryStream();

    using (StreamWriter writer = new StreamWriter(stream, Encoding.UTF8, 4 * 1024, true))
        await writer.WriteAsync(rawFormData);

    stream.Seek(0, SeekOrigin.Begin);

    Mock<IOwinRequest> requestMock = new Mock<IOwinRequest>();
    requestMock.SetupGet(r => r.Method).Returns("POST");
    requestMock.SetupGet(r => r.Body).Returns(stream);
    requestMock.SetupGet(r => r.ContentType).Returns("application/x-www-form-urlencoded");

    Assert.IsNotNull(await requestMock.Object.ReadFormAsync());
}

ReadFormAsync方法返回的表单对象为null。我错过了什么？这是在.Net4.5和Microsoft.Owin 3.0.1

上

Answer 1

您没有设置该方法，因此在调用时显然会返回null。

[TestMethod]
public async Task _TestPostData() {
    var dictionary = new Dictionary<string, string[]>() {
         { "test", new[]{"testValue"}},
         { "test2", new[]{"testValue2"}},

    };
    String rawFormData = "test=testValue&test2=testValue2";
    var stream = new MemoryStream();

    using (var writer = new StreamWriter(stream, Encoding.UTF8, 4 * 1024, true))
        await writer.WriteAsync(rawFormData);

    stream.Seek(0, SeekOrigin.Begin);

    var formMock = new Mock<IFormCollection>();
    formMock.Setup(_ => _.GetEnumerator()).Returns(() => dictionary.GetEnumerator());
    var readableString = formMock.As<IReadableStringCollection>();
    //..setup as desired 

    var requestMock = new Mock<IOwinRequest>();
    requestMock.Setup(_ => _.Method).Returns("POST");
    requestMock.Setup(_ => _.Body).Returns(stream);
    requestMock.Setup(_ => _.ContentType).Returns("application/x-www-form-urlencoded");
    requestMock.Setup(_ => _.ReadFormAsync()).ReturnsAsync(formMock.Object);

    Assert.IsNotNull(await requestMock.Object.ReadFormAsync());
}

但鉴于此问题似乎是XY problem。在这个答案中，我可以提供的设置并不多。

在单元测试中将表单数据写入OwinRequest

1 个答案: