I don't want to use powermock anymore. Because junit5 started mocking static classes. So i am trying to get rid of powermock methods.
While i was using PowerMock, i could easily spy a class that has a private constructor, and then i was calling the static methods.
This is a part of my code ( When i was using PowerMock )
@RunWith(PowerMockRunner.class)
@PrepareForTest(MessageValidationUtils.class)
public class MessageValidationServiceTest {
@Mock
private CheckpointCustomerService checkpointCustomerService;
@Mock
private ProductClientService productClientService;
@Before
public void setUp() {
MockitoAnnotations.openMocks(this);
PowerMockito.spy(MessageValidationUtils.class);
}
After i make a spy object of MessageValidationUtils.class, i was testing this:
when(MessageValidationUtils.validateTelegramKeyMap(messageProcessDto.getMessageMessageType(),
messageProcessDto.getMessageKeyValueMap())).thenAnswer((Answer<Boolean>) invocation -> true);
After some research i couldn't find anything related to spy a class that has a private constructor and static methods.
CodePudding user response:
During mockStatic
definition in Mockito you can specify setting to perform real execution by default Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS)
. In this way, your static mock will work like Spy
.
Let's create simple Utils
class for testing.
public class Utils {
public static String method1() {
return "Original mehtod1() value";
}
public static String method2() {
return "Original mehtod2() value";
}
public static String method3() {
return method2();
}
}
Make mock for method2
and perform real execution of method1
and method3
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;
import org.mockito.Mockito;
public class SpyStaticTest {
@Test
public void spy_static_test() {
try (MockedStatic<Utils> utilities = Mockito.mockStatic(Utils.class, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS))) {
utilities.when(Utils::method2).thenReturn("static mock");
Assertions.assertEquals(Utils.method1(), "Original mehtod1() value");
Assertions.assertEquals(Utils.method2(), "static mock");
Assertions.assertEquals(Utils.method3(), "static mock");
}
}
}
Example for your class:
@Test
public void test() {
try (MockedStatic<MessageValidationUtils> utilities = Mockito.mockStatic(MessageValidationUtils.class, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS))) {
utilities.when(() -> MessageValidationUtils.validateTelegramKeyMap(messageProcessDto.getMessageMessageType(),
messageProcessDto.getMessageKeyValueMap())).thenAnswer((Answer<Boolean>) invocation -> true);
//perform testing of your service which uses MessageValidationUtils
}
}