java单元测试使用jMockit mock私有方法，jmockitmock,jMockit简直是万能

java单元测试使用jMockit mock私有方法，jmockitmock,jMockit简直是万能

jMockit简直是万能的，私有方法也可以方便的做Mock。如下是mock私有方法的代码：

要测试的类

package cn.outofmemory.junit.jmockit;public class MockTarget{    private Object privateMethod() {        return "Hello Object";    }    public String publicMethod() {        return (String)this.privateMethod();    }}

测试类：

package cn.outofmemory.junit.jmockit;import mockit.Expectations;import mockit.Injectable;import mockit.MockUp;import mockit.Mocked;import mockit.Mockit;import mockit.NonStrict;import mockit.Tested;public class MockTargetTest {    @BeforeClass    static public void beforeClass() {        Mockit.setUpMocks();    }    @Mocked    private MockTarget mt;    @Test    public void testPrivateMethodMock() {               new Expectations(mt) {            {                // 对私有方法进行mock                  this.invoke(mt, "privateMethod");                  result = "Hello Object";              }        };        Object actual = mt.publicMethod();        assertEquals(actual,"Hello Object");    }}

jMockit对于私有方法的mock很简单，只需要在使用实例之前通过Expectations(target){{}}定义要mock的私有方法的返回值即可。