Question

I’m trying to use a “test” or “dev” version of Google App Engine’s LogService so that I can use it in unit tests outside of GAE.

I included the appengine-testing.jar, appengine-api.jar and appengine-api-stubs.jar on my classpath, and see a class that looks like what I want:

com.google.appengine.api.log.dev.LocalLogService

When I create an instance of this and try to look for a fetch(LogQuery) method, I don’t see any. So clearly this isn’t the class I’m looking for. Where am I going wrong? Thanks in advance.

Answer 1

Just use something like Mockito to mock the GAE LoggingService:

@Test
public void myUnitTest() {
    // Given
    MyPojo fixture = new MyPojo();

    LoggingService mockService = Mockito.mock(Logging.Service);

    Mockito.doNothing().when(mockService).fetchLogs(Mockito.any());

    fixture.setLoggingService(mockService);

    // When
    fixture.logSomethingToGAELogs("Some string to log");

    // Then - verify
    Mockito.verify(mockService).fetchLogs("Some string to log");
}