Github user britter commented on a diff in the pull request: https://github.com/apache/commons-lang/pull/192#discussion_r80358033 --- Diff: src/test/java/org/apache/commons/lang3/time/DateUtilsTest.java --- @@ -693,6 +693,43 @@ public void testToCalendar() { // expected } } + + //----------------------------------------------------------------------- + @Test + public void testToCalendarWithDate() { + assertEquals("Convert Date and TimeZone to a Calendar, but failed to get the Date back", date1, DateUtils.toCalendar(date1, zone).getTime()); + try { + DateUtils.toCalendar(null, zone); + fail("Expected NullPointerException to be thrown"); + } catch(final NullPointerException npe) { + // expected + } + } + + //----------------------------------------------------------------------- + @Test + public void testToCalendarWithTimeZone() { + assertEquals("Convert Date and TimeZone to a Calendar, but failed to get the TimeZone back", zone, DateUtils.toCalendar(date1, zone).getTimeZone()); + try { + DateUtils.toCalendar(date1, null); + fail("Expected NullPointerException to be thrown"); + } catch(final NullPointerException npe) { + // expected + } + } + + //----------------------------------------------------------------------- + @Test + public void testToCalendarWithDateAndTimeZone() { + try { + Calendar c = DateUtils.toCalendar(date2, defaultZone); + assertEquals("Convert Date and TimeZone to a Calendar, but failed to get the Date back", date2, c.getTime()); + assertEquals("Convert Date and TimeZone to a Calendar, but failed to get the TimeZone back", defaultZone, c.getTimeZone()); + // expected + } catch(final NullPointerException npe) { + fail("Expected NullPointerException to be thrown"); --- End diff -- I don't understand this code. Why is a `NullPointerException` expected at this point?
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