specify the timezone in tests

Author: Davies Liu

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala

@@ -497,12 +497,14 @@ class DateTimeUtilsSuite extends SparkFunSuite {
       }
     }
 
-    // Daylight Saving Time
-    test("2016-03-13 09:59:59.0", "PST", "2016-03-13 01:59:59.0")
-    test("2016-03-13 10:00:00.0", "PST", "2016-03-13 03:00:00.0")
-    test("2016-11-06 08:59:59.0", "PST", "2016-11-06 01:59:59.0")
-    test("2016-11-06 09:00:00.0", "PST", "2016-11-06 01:00:00.0")
-    test("2016-11-06 10:00:00.0", "PST", "2016-11-06 02:00:00.0")
+    DateTimeTestUtils.withDefaultTimeZone(TimeZone.getTimeZone("PST")) {
+      // Daylight Saving Time
+      test("2016-03-13 09:59:59.0", "PST", "2016-03-13 01:59:59.0")
+      test("2016-03-13 10:00:00.0", "PST", "2016-03-13 03:00:00.0")
+      test("2016-11-06 08:59:59.0", "PST", "2016-11-06 01:59:59.0")
+      test("2016-11-06 09:00:00.0", "PST", "2016-11-06 01:00:00.0")
+      test("2016-11-06 10:00:00.0", "PST", "2016-11-06 02:00:00.0")
+    }
   }
 
   test("to UTC timestamp") {
@@ -520,14 +522,18 @@ class DateTimeUtilsSuite extends SparkFunSuite {
       }
     }
 
-    // Daylight Saving Time
-    test("2016-03-13 01:59:59", "PST", "2016-03-13 09:59:59.0")
-    test("2016-03-13 03:00:00", "PST", "2016-03-13 10:00:00.0")
-    test("2016-11-06 00:59:59", "PST", "2016-11-06 07:59:59.0")
-    // 2016-11-06 01:00:00 PST could be 2016-11-06 08:00:00 UTC or 2016-11-06 09:00:00 UTC
-    test("2016-11-06 01:00:00", "PST", "2016-11-06 09:00:00.0")
-    test("2016-11-06 01:59:59", "PST", "2016-11-06 09:59:59.0")
-    test("2016-11-06 02:00:00", "PST", "2016-11-06 10:00:00.0")
+    DateTimeTestUtils.withDefaultTimeZone(TimeZone.getTimeZone("PST")) {
+      // Daylight Saving Time
+      test("2016-03-13 01:59:59", "PST", "2016-03-13 09:59:59.0")
+      // 2016-03-13 02:00:00 PST does not exists
+      test("2016-03-13 02:00:00", "PST", "2016-03-13 10:00:00.0")
+      test("2016-03-13 03:00:00", "PST", "2016-03-13 10:00:00.0")
+      test("2016-11-06 00:59:59", "PST", "2016-11-06 07:59:59.0")
+      // 2016-11-06 01:00:00 PST could be 2016-11-06 08:00:00 UTC or 2016-11-06 09:00:00 UTC
+      test("2016-11-06 01:00:00", "PST", "2016-11-06 09:00:00.0")
+      test("2016-11-06 01:59:59", "PST", "2016-11-06 09:59:59.0")
+      test("2016-11-06 02:00:00", "PST", "2016-11-06 10:00:00.0")
+    }
   }
 
   test("daysToMillis and millisToDays") {