CODEWITHSUNDEEP
javaunit-testingmockito
haoyu wang
haoyu wang

Reputation: 1377

UnfinishedStubbingException when mock static method with Mockito.mockStatic

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.

Upvotes: 7

Views: 4722

Answers (3)

Jags
Jags

Reputation: 1761

You need to instantiate the return object outside of your try block.

The issue is that you are mocking the LocalDate class, and then trying to use that same class within the mocked try block;

mocked.when(LocalDate::now).thenReturn(LocalDate.of(2020,11,10));

@sankv answer works because it instantiates the returned LocalDate prior to the static block.

Upvotes: 7

sankv
sankv

Reputation: 31

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);
        }
    }

Upvotes: 3

Nikita
Nikita

Reputation: 100

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

Upvotes: -2

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