Various additions to the Intl.Locale test coverage.

harness/testIntl.js

@@ -183,6 +183,11 @@ function getInvalidLanguageTags() {
     "中文", // non-ASCII letters
     "en-ß", // non-ASCII letters
     "ıd", // non-ASCII letters
+    "es-Latn-latn", // two scripts
+    "pl-PL-pl", // two regions
+    "u-ca-gregory", // extension in first place
+    "de-1996-1996", // duplicate numeric variant
+    "pt-u-ca-gregory-u-nu-latn", // duplicate singleton subtag
 
     // underscores in different parts of the language tag
     "de_DE",

test/intl402/Locale/constructor-options-language-invalid.js

@@ -50,7 +50,8 @@ const invalidLanguageOptions = [
   "i-klingon",
 
   // Regular grandfathered language tag.
-  "zh-Hant",
+  "zh-min",
+  "zh-min-nan",
 
   // Reserved with extended language subtag
   "abcd-US",

test/intl402/Locale/constructor-options-numberingsystem-invalid.js

@@ -1,4 +1,4 @@
-// Copyright 2018 Igalia, S.L. All rights reserved.
+// Copyright 2018 André Bargull; Igalia, S.L. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
@@ -25,6 +25,13 @@ const invalidNumberingSystemOptions = [
   "ab",
   "abcdefghi",
   "abc-abcdefghi",
+  "!invalid!",
+  "-latn-",
+  "latn-",
+  "latn--",
+  "latn-ca",
+  "latn-ca-",
+  "latn-ca-gregory",
 ];
 for (const invalidNumberingSystemOption of invalidNumberingSystemOptions) {
   assert.throws(RangeError, function() {

test/intl402/Locale/constructor-tag.js

@@ -0,0 +1,40 @@
+// 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 )
+    10. Return CanonicalizeLanguageTag(tag).
+features: [Intl.Locale]
+---*/
+
+const validLanguageTags = {
+    "eN": "en",
+    "en-gb": "en-GB",
+    "IT-LATN-iT": "it-Latn-IT",
+    "ar-ma-u-ca-islamicc": "ar-MA-u-ca-islamicc",
+    "th-th-u-nu-thai": "th-TH-u-nu-thai",
+    "X-u-foo": "x-u-foo",
+    "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",
+    "Flob": "flob",
+    "ZORK": "zork",
+    "Blah-latn": "blah-Latn",
+    "QuuX-latn-us": "quux-Latn-US",
+    "SPAM-gb-x-Sausages-BACON-eggs": "spam-GB-x-sausages-bacon-eggs",
+    "DE-1996": "de-1996",
+    "sl-ROZAJ-BISKE-1994": "sl-rozaj-biske-1994",
+    "zh-latn-pinyin-pinyin2": "zh-Latn-pinyin-pinyin2",
+};
+
+for (const [langtag, canonical] of Object.entries(validLanguageTags)) {
+    assert.sameValue(new Intl.Locale(canonical).toString(), canonical,
+                     `"${canonical}" should pass through unchanged`);
+    assert.sameValue(new Intl.Locale(langtag).toString(), canonical,
+                     `"${langtag}" should be canonicalized to "${canonical}`);
+}