@RunWith(PowerMockRunner.class)

@PrepareForTest(Helper.class)//1.新增要初始化的類,就是建構函式所在的類

public class HelperTest {

@Mock

private Something mockSomething;

@InjectMocks

private Helper helper;

@Test

public void doSomething() throws Exception {

String argument = "arg";

PowerMockito.whenNew(Something.class).withArguments(argument).thenReturn(mockSomething);//2.新增要構造的函式的類,引數和返回值

// 3.呼叫需要測試方法

helper.doSomething(argument);

// 進行驗證

verify(mockSomething).doIt();

}

}

public class Helper ｛

public void doSomething(String arg) {

Something something = new Something(arg);

something.doit();

}

}