像往常一样，你可以：

1. 从 TestClass1扩展 TestClass2


2. 访问 TestClass1 来自 TestClass2 使用委托：

1. Extends TestClass2 from TestClass1
2. Access TestClass1 from TestClass2 using delegation:

示例1：

// Instantiate TestClass1 inside test method
public TestClass2 {
    public void testSomethingAndSomethingElse1() {
         new TestClass1().testSomething();
    }
}

示例2：

// Instantiate TestClass1 as a member of TestClass2
public TestClass2 {
    private TestClass1 one = new TestClass1();
    public void testSomethingAndSomethingElse1() {
         one.testSomething();
    }
}