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+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 9.2.1_3
+description: >
+    Tests that a single string instead of a locale list is treated  as
+    the locale list containing that string.
+author: Norbert Lindenberg
+includes: [testIntl.js]
+---*/
+
+var validAndInvalidLanguageTags = [
+    "de", // ISO 639 language code
+    "de-DE", // + ISO 3166-1 country code
+    "DE-de", // tags are case-insensitive
+    "cmn", // ISO 639 language code
+    "cmn-Hans", // + script code
+    "CMN-hANS", // tags are case-insensitive
+    "cmn-hans-cn", // + ISO 3166-1 country code
+    "es-419", // + UN M.49 region code
+    "es-419-u-nu-latn-cu-bob", // + Unicode locale extension sequence
+    "i-klingon", // grandfathered tag
+    "cmn-hans-cn-t-ca-u-ca-x-t-u", // singleton subtags can also be used as private use subtags
+    "de-gregory-u-ca-gregory", // variant and extension subtags may be the same
+    "de_DE",
+    "DE_de",
+    "cmn_Hans",
+    "cmn-hans_cn",
+    "es_419",
+    "es-419-u-nu-latn-cu_bob",
+    "i_klingon",
+    "cmn-hans-cn-t-ca-u-ca-x_t-u",
+    "enochian_enochian",
+    "de-gregory_u-ca-gregory",
+    "i", // singleton alone
+    "x", // private use without subtag
+    "u", // extension singleton in first place
+    "419", // region code in first place
+    "u-nu-latn-cu-bob", // extension sequence without language
+    "hans-cmn-cn", // "hans" could theoretically be a 4-letter language code,
+                   // but those can't be followed by extlang codes.
+    "cmn-hans-cn-u-u", // duplicate singleton
+    "cmn-hans-cn-t-u-ca-u", // duplicate singleton
+    "de-gregory-gregory" // duplicate variant
+];
+
+testWithIntlConstructors(function (Constructor) {
+    validAndInvalidLanguageTags.forEach(function (locale) {
+        var obj1, obj2, locale1, locale2, error1, error2;
+        try {
+            obj1 = new Constructor(locale);
+            locale1 = obj1.resolvedOptions().locale;
+        } catch (e) {
+            error1 = e;
+        }
+        try {
+            obj2 = new Constructor([locale]);
+            locale2 = obj2.resolvedOptions().locale;
+        } catch (e) {
+            error2 = e;
+        }
+
+        assert.sameValue((error1 === undefined), (error2 === undefined), "Single locale string " + locale + " was " + (error1 === undefined ? "accepted" : "rejected") + ", but locale list containing that string wasn't.");
+        if (error1 === undefined) {
+            assert.sameValue(locale1, locale2, "Single locale string " + locale + " results in " + locale1 + ", but locale list [" + locale + "] results in " + locale2 + ".");
+        } else {
+            assert.sameValue(error1.name, error2.name, "Single locale string " + locale + " results in error " + error1.name + ", but locale list [" + locale + "] results in error " + error2.name + ".");
+        }
+    });
+});
+
+reportCompare(0, 0);