private void assertSingle(final Action1<Geocache> cacheSetter, final Action1<DateRangeGeocacheFilter> filterSetter, final Boolean expectedResult) {
        GeocacheFilterTestUtils.testSingle(GeocacheFilterType.HIDDEN, cacheSetter, filterSetter, expectedResult);
    }
This class tests the Date filters, using HIDDEN filter as an example
main/src/androidTest/java/cgeo/geocaching/filters/DateRangeGeocacheFilterTest.java