如何用mockito模拟一个静态方法？[副本]

Question

this is the class i want to mock
String buc = TrackerGenerator.getMetadataLocalThread().getIdUsuarioFinal();

这就是考验

 @Test
   public void serviceTest() {
   TrackerGenerator trackerGenerator = mock(TrackerGenerator.class);
 when(TrackerGenerator.getMetadataLocalThread().getIdUsuarioFinal()).thenReturn("0");
      TrackerGenerator.setMetadataLocalThread(new ThreadLocal<>());
}

Answer 1

由于静态方法属于类，所以在Mockito中没有办法模拟静态方法。但是，您可以使用PowerMock与Mockito框架一起模拟静态方法。

具有静态方法的简单类：

public class Utils {

    public static boolean print(String msg) {
        System.out.println(msg);

        return true;
    }
}

JUnit测试用例中使用Mockito和PowerMock的类测试模拟静态方法；

@RunWith(PowerMockRunner.class)
@PrepareForTest(Utils.class)
public class JUnit4PowerMockitoStaticTest{

    @Test
    public void test_static_mock_methods() {
        PowerMockito.mockStatic(Utils.class);
        when(Utils.print("Hello")).thenReturn(true);
        when(Utils.print("Wrong Message")).thenReturn(false);

        assertTrue(Utils.print("Hello"));
        assertFalse(Utils.print("Wrong Message"));

        PowerMockito.verifyStatic(Utils.class, atLeast(2));
        Utils.print(anyString());
    }
}