Mock一个简单方法
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//given ClassTest test = Mockito.mock(ClassTest.class); Object result = new Object(); //when Mockito.when(test.methodOne()).thenReturn(result); //then Assert.assertEquals(test.methodOne(), result); |
让某个方法调用真实实现
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//given ClassTest test = Mockito.mock(ClassTest.class); //when Mockito.when(test.methodOne()).thenCallRealMethod(); //then Assert.assertEquals(test.methodOne(), null); |
其实Mockito.mock()外还有一个方法Mockito.spy(), 这样mock出来的类， 只要没有指定when去mock的方法， 都会默认调用真实实现
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//given ClassTest test = Mockito.spy(new ClassTest()); Object result = new Object(); //when Mockito.doReturn(result).when(test).methodOne();//注意这里最好这样mock //then Assert.assertEquals(test.methodOne(), result); Assert.assertEquals(test.methodTwo(), result);//会调用真实实现 |
Mock静态方法
这里要用到另一个库PowerMokito
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@RunWith(PowerMockRunner.class) @PrepareForTest(YourMockStaticClass.class) public class Mocker { @Test public void testOne() throws Exception { //given PowerMockito.mockStatic(YourMockStaticClass.class); BDDMockito.given(YourMockStaticClass.staticMethod(...)).willReturn(...); //when sut.execute(); //then PowerMockito.verifyStatic(); YourMockStaticClass.staticMethod(...); } |
Mock void方法
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//given ClassTest test = Mockito.mock(ClassTest.class); //when Mockito.doNothing().when(test).voidMethod(); //then Mockito.verify(test, Mockito.times(1)).voidMethod(); |