How to mock the static LocalDate.now() call in java.
@RunWith(PowerMockRunner.class)
@PrepareForTest({LocalDate.class,PublicationValidator.class})
public class PublicationValidatorTest {
private Validator validator;
@Before
public void setUp(){
LocalDate date = LocalDate.of(2000, 1, 1);
PowerMockito.stub(PowerMockito.method(LocalDate.class,"now")).toReturn(date);
validator = new Validator();
}
@Test
public void exampleTest() {
result = validator.callWithCallToLocalDate()
assertThat(result).isTrue();
}
}
@RunWith(PowerMockRunner.class) Will enable powermock for this test class
@PrepareForTest({LocalDate.class,Validator.class}) Include both the class to mock and the class using the mock
LocalDate date = LocalDate.of(2000, 1, 1); Decide which date should be used for the tests
PowerMockito.stub(PowerMockito.method(LocalDate.class,"now")).toReturn(date); This line will mock specifically the call to LocalDate.now() (other methods remain unaffected)
It is also possible to mock all calls by using PowerMockito.mockStatic(LocalDate.class) with a when().thenReturn() statement after.
Remember to add PowerMock and the powermock mockito api to your classpath. Maven file:
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>2.0.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito2</artifactId>
<version>2.0.4</version>
<scope>test</scope>
</dependency>