Add additional test for daylight savings glitch

The problem was that clocks go forward *at* 2am, so
2am doesn't exist once a year. Users might be surprised
that their cron trigger doesn't go off one night, but that
is arguably correct (and what happens now). The test can be
modified if we decide to change the trigger behaviour.

Author: Dave Syer

spring-context/src/test/java/org/springframework/scheduling/support/CronTriggerTests.java

@@ -56,7 +56,7 @@ public CronTriggerTests(Date date, TimeZone timeZone) {
 	@Parameters
 	public static List<Object[]> getParameters() {
 		List<Object[]> list = new ArrayList<Object[]>();
-		list.add(new Object[] { new Date(), TimeZone.getDefault() });
+		list.add(new Object[] { new Date(), TimeZone.getTimeZone("PST") });
 		list.add(new Object[] { new Date(), TimeZone.getTimeZone("CET") });
 		return list;
 	}
@@ -694,6 +694,26 @@ public void testMonthSequence() throws Exception {
 		assertEquals(calendar.getTime(), date = trigger.nextExecutionTime(context3));
 	}
 
+	@Test
+	public void testDaylightSavingMissingHour() throws Exception {
+		// This trigger has to be somewhere in between 2am and 3am
+		CronTrigger trigger = new CronTrigger("0 10 2 * * *", timeZone);
+		calendar.set(Calendar.DAY_OF_MONTH, 31);
+		calendar.set(Calendar.MONTH, Calendar.MARCH);
+		calendar.set(Calendar.YEAR, 2013);
+		calendar.set(Calendar.HOUR_OF_DAY, 1);
+		calendar.set(Calendar.SECOND, 54);
+		Date date = calendar.getTime();
+		TriggerContext context1 = getTriggerContext(date);
+		if (timeZone.equals(TimeZone.getTimeZone("CET"))) {
+			// Clocks go forward an hour so 2am doesn't exist in CET for this date
+			calendar.add(Calendar.DAY_OF_MONTH, 1);
+		}
+		calendar.add(Calendar.HOUR_OF_DAY, 1);
+		calendar.set(Calendar.MINUTE, 10);
+		calendar.set(Calendar.SECOND, 0);
+		assertEquals(calendar.getTime(), date = trigger.nextExecutionTime(context1));
+	}
 
 	private void assertMatchesNextSecond(CronTrigger trigger, Calendar calendar) {
 		Date date = calendar.getTime();