单元测试帮助。如何测试一个消息输出到控制台？ [英] Unit Test Help. How do I test for a message output to console?

问题描述

我是一个新手，单元测试。我如何检查控制台输出？
我有

I am a newbie to unit testing. How do I check the for console output? I have

namespace XXShapes
{
    public abstract class XXShape
    {
        public virtual void DrawXXShape()
        {
            Console.WriteLine("The XXShape was drawn.");

        }
    }

public class XXCircle : XXShape
{
    public override void DrawXXShape()
    {
        Console.WriteLine("The XXCircle was drawn.");
    }
}

}

}

namespace XXShapes.Test
{
    [TestFixture]
    public class XXShapeTest
    {
        [Test]
        public void MyFirstTest()
        {
            XXShape s = new XXCircle();
            string expected = "The XXCircle was drawn.";
            s.DrawXXShape();
            string actual = Console.ReadLine();
            Assert.AreEqual(expected, actual);
        }
    }


}

我应该如何正确地测试这个？
感谢您的任何指针。
干杯，
〜CK

How should I correctly be testing this? Thanks for any pointers. Cheers, ~ck

推荐答案

字面的答案是，你会使用 Console.SetOut 调用之前所测试的类直接标准输出到MemoryStream或相似，其内容可以在以后检查。

The literal answer would be that you would use Console.SetOut before calling the class under test to direct stdout into a memoryStream or similar, whose contents you can later inspect.

更好的答案是使用一个模拟框架，像犀牛制品创建抽象类的具体实例，期望设置了 DrawXXShape 方法将被调用。

The better answer would be to use a mocking framework, like Rhino Mocks to create a concrete instance of your abstract class, with an expectation set that the DrawXXShape method would be called.

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