Junit3

package code;

public class MyCode {

    public int m1(){
        System.out.println("数字型");
        return 1;
    }

    public String m2(){
        System.out.println("null");
        return null;
    }

    public boolean m3(){
        System.out.println("boolean");
        return true;
    }
    //------------------------------------------
    static MyCode obj = new MyCode();
    public MyCode m4_1(){
        System.out.println("obj");
        return obj;
    }

    public MyCode m4_2(){
        System.out.println("obj");
        return obj;
    }
}

package test;

import code.MyCode;
import junit.framework.TestCase;

public class TestJunit extends TestCase {

    public void testM1() {
        MyCode mc = new MyCode();
        assertEquals(1, mc.m1());
    }

    public void testM2() {
        MyCode mc = new MyCode();
        assertNull(mc.m2());
    }

    public void testM3() {
        MyCode mc = new MyCode();
        assertTrue(mc.m3());
    }

    public void testM4() {
        MyCode mc = new MyCode();
        assertSame(mc.m4_1(), mc.m4_2());
    }

    public static void main(String[] args) {
        /*
         * 由此 Class 对象建模的类的类型。例如，String.class 的类型是 Class<String>。
         */
        junit.textui.TestRunner.run(TestJunit.class);
    }

}