1 files changed, 69 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/constructor-options-region-valid.js b/js/src/tests/test262/intl402/Locale/constructor-options-region-valid.js
new file mode 100644
index 0000000000..f57fec2226
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/constructor-options-region-valid.js
@@ -0,0 +1,69 @@
+// 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: >
+    Checks error cases for the options argument to the Locale
+    constructor.
+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 )
+    ...
+    7. Let region be ? GetOption(options, "region", "string", undefined, undefined).
+    ...
+    9. If tag matches neither the privateuse nor the grandfathered production, then
+      ...
+      d. If region is not undefined, then
+        i. If tag does not contain a region production, then
+          1. Set tag to the concatenation of the language production of tag, the substring corresponding to the "-" script production if present, "-", region, and the rest of tag.
+        ii. Else,
+          1. Set tag to tag with the substring corresponding to the region production replaced by the string region.
+
+features: [Intl.Locale]
+---*/
+
+const validRegionOptions = [
+  [undefined, undefined],
+  ['FR', 'en-FR'],
+  ['554', 'en-NZ'],
+  [554, 'en-NZ'],
+];
+for (const [region, expected] of validRegionOptions) {
+  let options = { region };
+  let expect = expected || 'en';
+
+  assert.sameValue(
+    new Intl.Locale('en', options).toString(),
+    expect,
+    `new Intl.Locale('en', {region: "${region}"}).toString() returns "${expect}"`
+  );
+
+  expect = expected || 'en-US';
+  assert.sameValue(
+    new Intl.Locale('en-US', options).toString(),
+    expect,
+    `new Intl.Locale('en-US', {region: "${region}"}).toString() returns "${expect}"`
+  );
+
+  expect = (expected || 'en') + '-u-ca-gregory';
+  assert.sameValue(
+    new Intl.Locale('en-u-ca-gregory', options).toString(),
+    expect,
+    `new Intl.Locale('en-u-ca-gregory', {region: "${region}"}).toString() returns "${expect}"`
+  );
+
+  expect = (expected || 'en-US') + '-u-ca-gregory';
+  assert.sameValue(
+    new Intl.Locale('en-US-u-ca-gregory', options).toString(),
+    expect,
+    `new Intl.Locale('en-US-u-ca-gregory', {region: "${region}"}).toString() returns "${expect}"`
+  );
+}
+
+reportCompare(0, 0);