### Question:
Strings { public static String getIsoCalendarDate(Date dateToFormat) { SimpleDateFormat sdf = new SimpleDateFormat(getIsoCalendarDateFormat(), Locale.US); sdf.setTimeZone(TimeZone.getTimeZone("UTC")); return sdf.format(dateToFormat); }  static String getDescriptiveDurationString(int numberOfSeconds,
                                                      Context context); static String getBearingDescription(float bearingDegrees,
                                               Context context); static String cleanDescriptionForXml(String desc); static String cleanDescriptionForJson(String desc); static String getIsoDateTime(Date dateToFormat); static String getIsoDateTimeFormat(); static String getIsoCalendarDate(Date dateToFormat); static String getIsoCalendarDateFormat(); static String getReadableDateTime(Date dateToFormat); static boolean isNullOrEmpty(String text); static String htmlDecode(String text); static String getBuildSerial(); static String getFormattedFileName(); static String getFormattedFileName(Session session, PreferenceHelper ph); static String getFormattedCustomFileName(String baseName, Calendar calendar, PreferenceHelper ph); static int toInt(String number, int defaultVal); static String getSpeedDisplay(Context context, double metersPerSecond, boolean imperial); static String getDistanceDisplay(Context context, double meters, boolean imperial, boolean autoscale); static String getTimeDisplay(Context context, long milliseconds); static Map<String, String> getAvailableLocales(Context context); static String getSanitizedMarkdownForFaqView(String md); static String getDegreesMinutesSeconds(double decimaldegrees, boolean isLatitude); static String getDegreesDecimalMinutes(double decimaldegrees, boolean isLatitude); static String getDecimalDegrees(double decimaldegrees); static String getFormattedLatitude(double decimaldegrees); static String getFormattedLongitude(double decimaldegrees); static String getDetectedActivityName(DetectedActivity detectedActivity);  }### Answer:
@Test public void getIsoCalendarDate_DateObject_ConvertedToIso() { String actual = Strings.getIsoCalendarDate(new Date(1417726140000l)); String expected = "2014-12-04"; assertThat("Conversion of date to ISO string", actual, is(expected)); }
@Test public void getIsoCalendarDate_HigherResolutionMilliseconds_ConvertedToIso() { String actual = Strings.getIsoCalendarDate(new Date(1417726140001l)); String expected = "2014-12-04"; assertThat("Conversion of date to ISO string", actual, is(expected)); }