private static void assertFormatStoredAgo(final long agoInMillis, final String expected) {
        assertThat(Formatter.formatStoredAgo(System.currentTimeMillis() - agoInMillis)).isEqualTo(expected);
    }
The pattern we get from {@link Formatter#getShortDateFormat()} should be the one used by {@link Formatter#formatShortDate(long)}.
main/src/androidTest/java/cgeo/geocaching/utils/FormatterTest.java