UnfinishedStubbingException when mock static method with Mockito.mockStatic

Question

I got this exception when mock the LocalDate.now() static method with Mockito.mockStatic().

org.mockito.exceptions.misusing.UnfinishedStubbingException: Unfinished stubbing detected here: at utils.PowerMockTest.test(PowerMockTest.java:18)

E.g. thenReturn() may be missing.
Examples of correct stubbing: when(mock.isOk()).thenReturn(true); when(mock.isOk()).thenThrow(exception); doThrow(exception).when(mock).someVoidMethod(); Hints:

1. missing thenReturn()
2. you are trying to stub a final method, which is not supported
3. you are stubbing the behaviour of another mock inside before 'thenReturn' instruction is completed

code is

public class MockStaticTest {
    @Test
    void test(){
        LocalDate today=LocalDate.of(2020,11,20);
        try (MockedStatic mocked = mockStatic(LocalDate.class)) {
            mocked.when(LocalDate::now).thenReturn(LocalDate.of(2020,11,10));
            Assertions.assertEquals(today,LocalDate.now());
            mocked.verify(atLeastOnce(),LocalDate::now);
        }
    }
}

I'm a bit confused by the exception message because I certainly added thenReturn statement.
Any help would be appreciated.

Answer 1

did you try mocked.when(LocalDate.now()).thenReturn(LocalDate.of(2020,11,10)); ?

Answer 2

Try:

private LocalDate expectedReturn = LocalDate.of(2020, 11, 20);

    @Test
    void test() {
        LocalDate today = LocalDate.of(2020, 11, 20);
        try (MockedStatic<LocalDate> mocked = Mockito.mockStatic(LocalDate.class)) {
            mocked.when(LocalDate::now).thenReturn(expectedReturn);
            Assertions.assertEquals(today, LocalDate.now());
            mocked.verify(Mockito.atLeastOnce(), LocalDate::now);
        }
    }