mstest实现类似单元测试nunit中assert.throws功能

  次阅读 来源:互联网(转载协议) 2016-01-26 10:52 我要评论(0)

我们做单元测试NUnit中,有一个断言Assert.Throws很好用,现在我们来扩展一下也实现类似成功能,大家参考使用吧

我们做单元测试NUnit中,有一个断言Assert.Throws很好用,但当我们使用MsTest时你需要这样写:

代码如下:

[TestMethod]

[ExpectedException(typeof(ArgumentNullException))]

public void WriteToTextFile()

{

PDFUtility.WriteToTextFile("D:ACA.pdf", null);

}

现在让我们来扩展一下也实现类似成功能,增加一个类,代码如下:

代码如下:

/// <summary>

/// Useful assertions for actions that are expected to throw an exception.

/// </summary>

public static class ExceptionAssert

{

/// <summary>

/// Executes an exception, expecting an exception to be thrown.

/// Like Assert.Throws in NUnit.

/// </summary>

/// <param name="action">The action to execute</param>

/// <returns>The exception thrown by the action</returns>

public static Exception Throws(Action action)

{

return Throws(action, null);

}

/// <summary>

/// Executes an exception, expecting an exception to be thrown.

/// Like Assert.Throws in NUnit.

/// </summary>

/// <param name="action">The action to execute</param>

/// <param name="message">The error message if the expected exception is not thrown</param>

/// <returns>The exception thrown by the action</returns>

public static Exception Throws(Action action, string message)

{

try

{

action();

}

catch (Exception ex)

{

// The action method has thrown the expected exception.

// Return the exception, in case the unit test wants to perform further assertions on it.

return ex;

}

// If we end up here, the expected exception was not thrown. Fail!

throw new AssertFailedException(message ?? "Expected exception was not thrown.");

}

/// <summary>

/// Executes an exception, expecting an exception of a specific type to be thrown.

/// Like Assert.Throws in NUnit.

/// </summary>

/// <param name="action">The action to execute</param>

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