[书摘]使用Nested class进行代码测试

最新推荐文章于 2018-07-19 21:00:00 发布

翻译最新推荐文章于 2018-07-19 21:00:00 发布 · 970 阅读

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#nested #class #testing #include #delete #string

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本文介绍了一种利用Java中的嵌套类来存放测试代码的方法，这种方法可以在不增加额外编译代码负担的情况下，为每个类提供独立的测试环境。

Earlier in this book I suggested putting a main( ) in every class to act as a test bed for that class. One drawback to this is the amount of extra compiled code you must carry around. If this is a problem, you can use a nested class to hold your test code: Feedback

//: c08:TestBed.java
// Putting test code in a nested class.

public class TestBed {
  public TestBed() {}
  public void f() { System.out.println("f()"); }
  public static class Tester {
    public static void main(String[] args) {
      TestBed t = new TestBed();
      t.f();
    }
  }
} ///:~

This generates a separate class called TestBed$Tester (to run the program, you say java TestBed$Tester). You can use this class for testing, but you don’t need to include it in your shipping product; you can simply delete TestBed$Tester.class before packaging things up.

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Compile result :

E:/MyDoc/Exercises のディレクトリ

2006/03/23 09:37                  358 TestBed$Tester.class
2006/03/23 09:37                  439 TestBed.class
2006/03/23 09:37                  242 TestBed.java
               3 個のファイル               1,039 バイト
               0 個のディレクトリ 15,933,108,224 バイトの空き領域