断言从 NUnit 到 MS TEST 的异常

发布于 2024-12-17 06:34:02 字数 588 浏览 0 评论 0原文

我有一些测试，我正在检查异常中的参数名称。我如何在 MS TEST 中写这个？

ArgumentNullException exception = 
              Assert.Throws<ArgumentNullException>(
                            () => new NHibernateLawbaseCaseDataLoader( 
                                               null, 
                                               _mockExRepository,
                                               _mockBenRepository));

Assert.AreEqual("lawbaseFixedContactRepository", exception.ParamName);

我一直希望有更简洁的方法，这样我就可以避免在测试中使用 try catch 块。

原文

I have some tests where i am checking for parameter name in exception.
How do i write this in MS TEST?

ArgumentNullException exception = 
              Assert.Throws<ArgumentNullException>(
                            () => new NHibernateLawbaseCaseDataLoader( 
                                               null, 
                                               _mockExRepository,
                                               _mockBenRepository));

Assert.AreEqual("lawbaseFixedContactRepository", exception.ParamName);

I have been hoping for neater way so i can avoid using try catch block in the tests.

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十雾 2024-12-24 06:34:03

public static class ExceptionAssert
{
  public static T Throws<T>(Action action) where T : Exception
  {
    try
    {
      action();
    }
    catch (T ex)
    {
      return ex;
    }

    Assert.Fail("Expected exception of type {0}.", typeof(T));

    return null;
  }
}

您可以使用上面的扩展方法作为测试助手。以下是如何使用它的示例：

// test method
var exception = ExceptionAssert.Throws<ArgumentNullException>(
              () => organizations.GetOrganization());
Assert.AreEqual("lawbaseFixedContactRepository", exception.ParamName);

public static class ExceptionAssert
{
  public static T Throws<T>(Action action) where T : Exception
  {
    try
    {
      action();
    }
    catch (T ex)
    {
      return ex;
    }

    Assert.Fail("Expected exception of type {0}.", typeof(T));

    return null;
  }
}

You can use the extension method above as a test helper. Here is an example of how to use it:

// test method
var exception = ExceptionAssert.Throws<ArgumentNullException>(
              () => organizations.GetOrganization());
Assert.AreEqual("lawbaseFixedContactRepository", exception.ParamName);

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终难遇 2024-12-24 06:34:03

无耻的插件，但我编写了一个简单的程序集，使用 nUnit/xUnit 风格的 Assert.Throws() 语法，在 MSTest 中使断言异常和异常消息更容易且更具可读性。

您可以使用以下命令从 Nuget 下载软件包：PM> Install-Package MSTestExtensions

或者您可以在此处查看完整的源代码： https://github.com/ bbraithwaite/MSTestExtensions

高级指令，下载程序集并从 BaseTest 继承，并且可以使用 Assert.Throws() 语法。

Throws 实现的主要方法如下所示：

public static void Throws<T>(Action task, string expectedMessage, ExceptionMessageCompareOptions options) where T : Exception
{
    try
    {
        task();
    }
    catch (Exception ex)
    {
        AssertExceptionType<T>(ex);
        AssertExceptionMessage(ex, expectedMessage, options);
        return;
    }

    if (typeof(T).Equals(new Exception().GetType()))
    {
        Assert.Fail("Expected exception but no exception was thrown.");
    }
    else
    {
        Assert.Fail(string.Format("Expected exception of type {0} but no exception was thrown.", typeof(T)));
    }
}

更多信息这里。

Shameless plug, but I wrote a simple assembly that makes asserting exceptions and exception messages a little easier and more readable in MSTest using Assert.Throws() syntax in the style of nUnit/xUnit.

You can download the package from Nuget using: PM> Install-Package MSTestExtensions

Or you can see the full source code here: https://github.com/bbraithwaite/MSTestExtensions

High level instructions, download the assembly and inherit from BaseTest and you can use the Assert.Throws() syntax.

The main method for the Throws implementation looks as follows:

public static void Throws<T>(Action task, string expectedMessage, ExceptionMessageCompareOptions options) where T : Exception
{
    try
    {
        task();
    }
    catch (Exception ex)
    {
        AssertExceptionType<T>(ex);
        AssertExceptionMessage(ex, expectedMessage, options);
        return;
    }

    if (typeof(T).Equals(new Exception().GetType()))
    {
        Assert.Fail("Expected exception but no exception was thrown.");
    }
    else
    {
        Assert.Fail(string.Format("Expected exception of type {0} but no exception was thrown.", typeof(T)));
    }
}

More info here.

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