1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/constructor-tag.js b/js/src/tests/test262/intl402/Locale/constructor-tag.js
new file mode 100644
index 0000000000..e84fcdbfb5
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/constructor-tag.js
@@ -0,0 +1,59 @@
+// Copyright 2018 André Bargull; Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.locale
+description: >
+    Verifies canonicalization of specific tags.
+info: |
+    ApplyOptionsToTag( tag, options )
+    2. If IsStructurallyValidLanguageTag(tag) is false, throw a RangeError exception.
+    ...
+    13. Return CanonicalizeLanguageTag(tag).
+features: [Intl.Locale]
+---*/
+
+const validLanguageTags = {
+  "eN": "en",
+  "en-gb": "en-GB",
+  "IT-LATN-iT": "it-Latn-IT",
+  "th-th-u-nu-thai": "th-TH-u-nu-thai",
+  "en-x-u-foo": "en-x-u-foo",
+  "en-a-bar-x-u-foo": "en-a-bar-x-u-foo",
+  "en-x-u-foo-a-bar": "en-x-u-foo-a-bar",
+  "en-u-baz-a-bar-x-u-foo": "en-a-bar-u-baz-x-u-foo",
+  "DE-1996": "de-1996", // unicode_language_subtag sep unicode_variant_subtag
+  
+  // unicode_language_subtag (sep unicode_variant_subtag)*
+  "sl-ROZAJ-BISKE-1994": "sl-1994-biske-rozaj",
+  "zh-latn-pinyin-pinyin2": "zh-Latn-pinyin-pinyin2",
+};
+
+for (const [langtag, canonical] of Object.entries(validLanguageTags)) {
+  assert.sameValue(
+    new Intl.Locale(canonical).toString(),
+    canonical,
+    `new Intl.Locale("${canonical}").toString() returns "${canonical}"`
+  );
+  assert.sameValue(
+    new Intl.Locale(langtag).toString(),
+    canonical,
+    `new Intl.Locale("${langtag}").toString() returns "${canonical}"`
+  );
+}
+
+// unicode_language_subtag = alpha{2,3} | alpha{5,8};
+const invalidLanguageTags = [
+  "X-u-foo", 
+  "Flob",
+  "ZORK",
+  "Blah-latn",
+  "QuuX-latn-us",
+  "SPAM-gb-x-Sausages-BACON-eggs",
+];
+
+for (const langtag of invalidLanguageTags) {
+  assert.throws(RangeError, () => new Intl.Locale(langtag));
+}
+
+reportCompare(0, 0);