抓住一个单元测试内发送到Console.Out输出？ [英] Grabbing the output sent to Console.Out from within a unit test?

问题描述

我建立在C＃与NUnit的单元测试，我想测试的主要程序实际输出取决于命令行参数的正确输出。

I am building a unit test in C# with NUnit, and I'd like to test that the main program actually outputs the right output depending on the command line arguments.

有没有从NUnit测试方法，调用一个方法 Program.Main（...）抓住一切写入Console.Out和Console.Error使我可以验证反对呢？

Is there a way from a NUnit test method, that calls Program.Main(...) to grab everything written to Console.Out and Console.Error so that I can verify against it?

推荐答案

您可以重定向控制台输入，输出和错误定制StringWriters，像这样

You can redirect Console In, Out and Error to custom StringWriters, like this

[TestMethod]
public void ValidateConsoleOutput()
{
    using (StringWriter sw = new StringWriter())
    {
        Console.SetOut(sw);

        ConsoleUser cu = new ConsoleUser();
        cu.DoWork();

        string expected = string.Format("Ploeh{0}", Environment.NewLine);
        Assert.AreEqual<string>(expected, sw.ToString());
    }
}

请参阅这个博客帖子的全部细节。

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