1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Date/prototype/getMonth/this-value-valid-date.js b/js/src/tests/test262/built-ins/Date/prototype/getMonth/this-value-valid-date.js
new file mode 100644
index 0000000000..ec29f27910
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Date/prototype/getMonth/this-value-valid-date.js
@@ -0,0 +1,42 @@
+// 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.getmonth
+description: Return value for valid dates
+info: |
+  1. Let t be ? thisTimeValue(this value).
+  2. If t is NaN, return NaN.
+  3. Return MonthFromTime(LocalTime(t)).
+---*/
+
+assert.sameValue(new Date(2016, 6).getMonth(), 6, 'first millisecond');
+assert.sameValue(
+  new Date(2016, 6, 0, 0, 0, 0, -1).getMonth(), 5, 'previous millisecond'
+);
+assert.sameValue(
+  new Date(2016, 6, 31, 23, 59, 59, 999).getMonth(), 6, 'final millisecond'
+);
+assert.sameValue(
+  new Date(2016, 6, 31, 23, 59, 59, 1000).getMonth(), 7, 'subsequent millisecond'
+);
+
+assert.sameValue(
+  new Date(2016, 11, 31).getMonth(), 11, 'first millisecond (year boundary)'
+);
+assert.sameValue(
+  new Date(2016, 11, 0, 0, 0, 0, -1).getMonth(),
+  10,
+  'previous millisecond (year boundary)'
+);
+assert.sameValue(
+  new Date(2016, 11, 31, 23, 59, 59, 999).getMonth(),
+  11,
+  'final millisecond (year boundary)'
+);
+assert.sameValue(
+  new Date(2016, 11, 31, 23, 59, 59, 1000).getMonth(),
+  0,
+  'subsequent millisecond (year boundary)'
+);
+
+reportCompare(0, 0);