@Test
    @MediumTest
    public void testSearchTrackableNotExisting() {
        final Trackable tb = GCParser.searchTrackable("123456", null, null);
        assertThat(tb).isNull();
    }
Test {@link GCParser#searchTrackable(String, String, String)}
main/src/androidTest/java/cgeo/geocaching/CgeoApplicationTest.java