c# – 单元测试ReSharper和NUnit给出不同的结果

在本地计算机上使用ReSharper 8.2,在构建服务器上使用NUnit 2.6.3,发现在ReSharper中传递了一些测试并在NUnit中失败.在本地安装NUnit并且结果相同,因此计算机之间没有区别.我的两个同事进行了相同的测试并得到了相同的结果,所以看起来似乎没有弄乱我的电脑.

测试的简化版本：

[Test]
public void Test_UrlQueryString()
{
    var urlInput = "http://www.domain.com/page-with-querystring?url=https://www.domain2.com/page%3Fp%3DPEPE";
    var uri = new Uri(urlInput);

    Assert.AreEqual(urlInput,uri.ToString());
}

[Test]
public void Test_Dot()
{
    var urlInput = "http://www.domain.com/page-with-dot.?p=google";
    var uri = new Uri(urlInput);

    Assert.AreEqual(urlInput,uri.ToString());
}

ReSharper输出全部为绿色. NUnit的输出：

Runtime Environment -
   OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1
  CLR Version: 4.0.30319.18444 ( Net 4.5 )

ProcessModel: Default    DomainUsage: Single
Execution Runtime: net-4.5
...................F.F.........
Tests run: 29,Errors: 0,Failures: 2,Inconclusive: 0,Time: 0.576769973208475 seconds
  Not run: 0,Invalid: 0,Ignored: 0,Skipped: 0

Errors and Failures:

  1) Test Failure : Test.OrganicTest.Test_Dot
     Expected string length 45 but was 44. Strings differ at index 35.
  Expected: "http://www.domain.com/page-with-dot.?p=google"
  But was:  "http://www.domain.com/page-with-dot?p=google"
  ----------------------------------------------^

  2) Test Failure : Test.OrganicTest.Test_UrlQueryString
     Expected string length 87 but was 83. Strings differ at index 76.
  Expected: "...-with-querystring?url=https://www.domain2.com/page%3Fp%3DPEPE"
  But was:  "...-with-querystring?url=https://www.domain2.com/page?p=PEPE"
  ----------------------------------------------------------------^

ReSharper似乎使用相同版本的NUnit(内置NUnit 2.6.3)

有谁知道怎么解决这个问题？它是ReSharper或NUnit中的错误吗？

解决方法

最初,它是.NET Framework中的一个错误. URI scaping行为取决于环境(.NET Framework版本和配置).该错误已在.NET Framework 4.5中修复.例如,让我们拿代码

var uri1 = "http://www.domain.com/page-with-dot.?p=google";
var uri2 = "http://www.domain.com/page-with-querystring?url=https://www.domain2.com/page%3Fp%3DPEPE";
Console.WriteLine(new Uri(uri1).ToString());
Console.WriteLine(new Uri(uri2).ToString());

.NET Framework 3.5中的输出：

http://www.domain.com/page-with-dot?p=google
http://www.domain.com/page-with-querystring?url=https://www.domain2.com/page?p=PEPE

.NET Framework 4.5中的输出：

http://www.domain.com/page-with-dot.?p=google
http://www.domain.com/page-with-querystring?url=https://www.domain2.com/page%3Fp%3DPEPE

此外,您可以使用.config文件对转义行为进行一些更改.例如,.NET 4.0和斜杠转义有一个选项：

<configuration>
  <uri>
    <schemeSettings>
      <add name="http" 
           genericUriParserOptions="DontUnescapePathDotsAndSlashes" />
    </schemeSettings>
  </uri>
</configuration>

我认为,在你的情况下,ReSharper和NUnit只是使用不同的配置.虽然,真的很奇怪,NUnit收到了.NET 4.5的旧的uri转义结果.也许NUnit使用.NET 4.0中的一些微软库.此外,您可以通过手动将Framework选项设置为CLR4.0来使ReSharper中的测试失败.无论如何,您应该使用与环境无关的逻辑重写测试.

有用的链接：

> MS Connect 511010: Erroneous URI parsing for encoded,reserved characters,according to RFC 3986
> Mono Bug 16960
> StackOverflow: Getting a Uri with escaped slashes on mono
> StackOverflow: GETting a URL with an url-encoded slash
> Mono 3.10.0 release notes
> Mike Hadlow: How to stop System.Uri un-escaping forward slash characters
> Arnout’s Eclectica: URL-encoded slashes in System.Uri
> About slash escaping in .NET (In Russian)