created type-language-invalid.js for DisplayNames.prototype.of()

Co-authored-by: Richard Gibson <richard.gibson@gmail.com>

test/intl402/DisplayNames/prototype/of/type-language-invalid.js

@@ -0,0 +1,88 @@
+// Copyright (C) 2023 Igalia S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-Intl.DisplayNames.prototype.of
+description: Throws a RangeError for invalid `language` codes
+info: |
+  12.3.3 Intl.DisplayNames.prototype.of ( code )
+
+  1. If type is "language", then
+      a. If code cannot be matched by the unicode_language_id Unicode locale nonterminal, throw a RangeError exception.
+      b. If IsStructurallyValidLanguageTag(code) is false, throw a RangeError exception.
+      c. Return CanonicalizeUnicodeLocaleId(code).
+features: [Intl.DisplayNames-v2]
+---*/
+
+var displayNames = new Intl.DisplayNames(undefined, {type: 'language'});
+
+assert.throws(RangeError, function() {
+  displayNames.of('');
+}, 'invalid language subtag - empty string');
+
+assert.throws(RangeError, function() {
+  displayNames.of('a');
+}, 'invalid language subtag - only one character');
+
+assert.throws(RangeError, function() {
+  displayNames.of('abcdefghi');
+}, 'invalid language subtag - greater than 8 characters');
+
+assert.throws(RangeError, function() {
+  displayNames.of('en-u-hebrew');
+}, 'singleton subtag');
+
+assert.throws(RangeError, function() {
+  displayNames.of('aa-aaaa-bbbb');
+}, 'multiple script subtags');
+
+assert.throws(RangeError, function() {
+  displayNames.of('aa-aaaaa-aaaaa');
+}, 'duplicate variant subtag');
+
+assert.throws(RangeError, function() {
+  displayNames.of('aa-bb-cc');
+}, 'multiple region subtags');
+
+assert.throws(RangeError, function() {
+  displayNames.of('1a');
+}, 'invalid language subtag - leading digit');
+
+assert.throws(RangeError, function() {
+  displayNames.of('aa-1a');
+}, 'leading-digit subtag of length 2');
+
+assert.throws(RangeError, function() {
+  displayNames.of('aa-1aa');
+}, 'leading-digit non-numeric subtag of length 3');
+
+assert.throws(RangeError, function() {
+  displayNames.of('@#$%@#$');
+}, 'invalid characters');
+
+assert.throws(RangeError, function() {
+  displayNames.of('en-US-');
+}, 'separator not followed by subtag');
+
+assert.throws(RangeError, function() {
+  displayNames.of('-en');
+}, 'separator at start');
+
+assert.throws(RangeError, function() {
+  displayNames.of('en--GB');
+}, 'missing subtag between separators');
+
+assert.throws(RangeError, function() {
+  displayNames.of('root');
+}, 'BCP 47-incompatible CLDR syntax ("root" instead of "und")');
+
+assert.throws(RangeError, function(){
+  displayNames.of('abcd-GB');
+}, 'BCP 47-incompatible CLDR syntax (script subtag without a language subtag)');
+
+assert.throws(RangeError, function(){
+  displayNames.of('abcd');
+}, 'BCP 47-incompatible CLDR syntax (bare script subtag)');
+
+assert.throws(RangeError, function(){
+  displayNames.of('en_GB');
+}, 'BCP 47-incompatible CLDR syntax (_ as separator)');