1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Date/prototype/getTimezoneOffset/this-value-valid-date.js b/js/src/tests/test262/built-ins/Date/prototype/getTimezoneOffset/this-value-valid-date.js
new file mode 100644
index 0000000000..bf141b1038
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Date/prototype/getTimezoneOffset/this-value-valid-date.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-date.prototype.gettimezoneoffset
+description: Return value for valid dates
+info: |
+  1. Let t be ? thisTimeValue(this value).
+  2. If t is NaN, return NaN.
+  3. Return (t - LocalTime(t)) / msPerMinute.
+---*/
+
+assert.sameValue(
+  typeof new Date(0).getTimezoneOffset(), 'number', 'Unix epoch'
+);
+
+assert.sameValue(
+  typeof new Date(8640000000000000).getTimezoneOffset(),
+  'number',
+  'latest representable time'
+);
+
+assert.sameValue(
+  typeof new Date(-8640000000000000).getTimezoneOffset(),
+  'number',
+  'earliest representable time'
+);
+
+assert.sameValue(
+  typeof new Date().getTimezoneOffset(), 'number', 'current time'
+);
+
+reportCompare(0, 0);