使用Mockito对基于Guice的类进行单元测试

MyClass有两个依赖项(场地和录制),所以你必须模仿它们。

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
...
Venue venueMock = mock(Venue.class);
Record recordMock = mock(Record.class);

然后在单元测试中,您必须创建 MyClass 并断言预期结果:

例如:“如果aRecord.getJobType()为null,请确保在build()方法中引发异常”

@Test(expected=RuntimeException.class)// or whatever exception you expect
public void testIfExceptionIsThrownWhengetJobTypeReturnsNull() throws Throwable {
    Venue venueMock = mock(Venue.class);   //create the mocks
    Record recordMock = mock(Record.class);//create the mocks
    when(recordMock.getJobType()).thenReturn(null); //specify the behavior of the components that are not relevant to the tests

    MyClass myClass = new MyClass(venueMock, recordMock); 
    myClass.build();
    //you can make some assertions here if you expect some result instead of exception
}

注意,如果没有指定任何模拟依赖项的返回值(使用 when() )它将返回返回类型的默认值-对象为null,基元数为0,布尔值为false,等等。因此,最好存根中使用的所有方法 类名 .