1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/constructor-options-script-valid-undefined.js b/js/src/tests/test262/intl402/Locale/constructor-options-script-valid-undefined.js
new file mode 100644
index 0000000000..470d865d26
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+++ b/js/src/tests/test262/intl402/Locale/constructor-options-script-valid-undefined.js
@@ -0,0 +1,50 @@
+// Copyright 2018 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.locale
+description: >
+    Verify valid script option values (undefined)
+info: |
+    Intl.Locale( tag [, options] )
+    10. If options is undefined, then
+    11. Else
+        a. Let options be ? ToObject(options).
+    12. Set tag to ? ApplyOptionsToTag(tag, options).
+
+    ApplyOptionsToTag( tag, options )
+    ...
+    5. Let script be ? GetOption(options, "script", "string", undefined, undefined).
+    ...
+    9. If tag matches neither the privateuse nor the grandfathered production, then
+      ...
+      c. If script is not undefined, then
+        i. If tag does not contain a script production, then
+          1. Set tag to the concatenation of the language production of tag, "-", script, and the rest of tag.
+        ii. Else,
+          1. Set tag to tag with the substring corresponding to the script production replaced by the string script.
+
+
+features: [Intl.Locale]
+---*/
+
+assert.sameValue(
+  new Intl.Locale('en', {script: undefined}).toString(),
+  'en',
+  `new Intl.Locale('en', {script: undefined}).toString() returns "en"`
+);
+
+assert.sameValue(
+  new Intl.Locale('en-DK', {script: undefined}).toString(),
+  'en-DK',
+  `new Intl.Locale('en-DK', {script: undefined}).toString() returns "en-DK"`
+);
+
+assert.sameValue(
+  new Intl.Locale('en-Cyrl', {script: undefined}).toString(),
+  'en-Cyrl',
+  `new Intl.Locale('en-Cyrl', {script: undefined}).toString() returns "en-Cyrl"`
+);
+
+
+reportCompare(0, 0);