1 files changed, 71 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/unicode-bcp47-locale-ids-transformed-ext.js b/js/src/tests/non262/Intl/unicode-bcp47-locale-ids-transformed-ext.js
new file mode 100644
index 0000000000..50ac20e58b
--- /dev/null
+++ b/js/src/tests/non262/Intl/unicode-bcp47-locale-ids-transformed-ext.js
@@ -0,0 +1,71 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+const invalid = [
+    // empty
+    "en-t",
+    "en-t-a",
+    "en-t-x",
+    "en-t-0",
+
+    // incomplete
+    "en-t-",
+    "en-t-en-",
+    "en-t-0x-",
+
+    // tlang: unicode_language_subtag must be 2-3 or 5-8 characters and mustn't
+    // contain extlang subtags.
+    "en-t-root",
+    "en-t-abcdefghi",
+    "en-t-ar-aao",
+
+    // tlang: unicode_script_subtag must be 4 alphabetical characters, can't
+    // be repeated.
+    "en-t-en-lat0",
+    "en-t-en-latn-latn",
+
+    // tlang: unicode_region_subtag must either be 2 alpha characters or a three
+    // digit code.
+    "en-t-en-0",
+    "en-t-en-00",
+    "en-t-en-0x",
+    "en-t-en-x0",
+    "en-t-en-latn-0",
+    "en-t-en-latn-00",
+    "en-t-en-latn-xyz",
+
+    // tlang: unicode_variant_subtag is either 5-8 alphanum characters or 4
+    // characters starting with a digit.
+    "en-t-en-abcdefghi",
+    "en-t-en-latn-gb-ab",
+    "en-t-en-latn-gb-abc",
+    "en-t-en-latn-gb-abcd",
+    "en-t-en-latn-gb-abcdefghi",
+];
+
+// Canonicalisation also applies for the transformation extension. But also
+// see <https://github.com/tc39/ecma402/issues/330>.
+const valid = [
+    {locale: "en-t-en", canonical: "en-t-en"},
+    {locale: "en-t-en-latn", canonical: "en-t-en-latn"},
+    {locale: "en-t-en-ca", canonical: "en-t-en-ca"},
+    {locale: "en-t-en-latn-ca", canonical: "en-t-en-latn-ca"},
+    {locale: "en-t-en-emodeng", canonical: "en-t-en-emodeng"},
+    {locale: "en-t-en-latn-emodeng", canonical: "en-t-en-latn-emodeng"},
+    {locale: "en-t-en-latn-ca-emodeng", canonical: "en-t-en-latn-ca-emodeng"},
+    {locale: "sl-t-sl-rozaj-biske-1994", canonical: "sl-t-sl-1994-biske-rozaj"},
+    {locale: "DE-T-M0-DIN-K0-QWERTZ", canonical: "de-t-k0-qwertz-m0-din"},
+    {locale: "en-t-m0-true", canonical: "en-t-m0-true"},
+    {locale: "en-t-iw", canonical: "en-t-he"},
+    {locale: "und-Latn-t-und-hani-m0-names", canonical: "und-Latn-t-und-hani-m0-prprname"},
+];
+
+for (let locale of invalid) {
+    assertThrowsInstanceOf(() => Intl.getCanonicalLocales(locale), RangeError);
+}
+
+for (let {locale, canonical} of valid) {
+    assertEq(Intl.getCanonicalLocales(locale)[0], canonical);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);