1 files changed, 157 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DisplayNames/region.js b/js/src/tests/non262/Intl/DisplayNames/region.js
new file mode 100644
index 0000000000..94849d6e66
--- /dev/null
+++ b/js/src/tests/non262/Intl/DisplayNames/region.js
@@ -0,0 +1,157 @@
+// |reftest| skip-if(!this.hasOwnProperty('Intl'))
+
+const tests = {
+  "en": {
+    long: {
+      "DE": "Germany",
+      "GB": "United Kingdom",
+      "US": "United States",
+      "FR": "France",
+    },
+    short: {
+      "GB": "UK",
+      "US": "US",
+    },
+    narrow: {},
+  },
+  "de": {
+    long: {
+      "DE": "Deutschland",
+      "GB": "Vereinigtes Königreich",
+      "US": "Vereinigte Staaten",
+      "FR": "Frankreich",
+    },
+    short: {
+      "GB": "GB",
+      "US": "USA",
+    },
+    narrow: {},
+  },
+  "fr": {
+    long: {
+      "DE": "Allemagne",
+      "GB": "Royaume-Uni",
+      "US": "États-Unis",
+      "FR": "France",
+    },
+    short: {
+      "GB": "R.-U.",
+      "US": "É.-U.",
+    },
+    narrow: {},
+  },
+  "zh": {
+    long: {
+      "CN": "中国",
+      "HK": "中国香港特别行政区",
+    },
+    short: {
+      "HK": "香港"
+    },
+    narrow: {},
+  },
+  "ar": {
+    long: {
+      "SA": "المملكة العربية السعودية",
+      "MO": "منطقة ماكاو الإدارية الخاصة",
+    },
+    short: {
+      "MO": "مكاو",
+    },
+    narrow: {},
+  },
+};
+
+for (let [locale, localeTests] of Object.entries(tests)) {
+  for (let [style, styleTests] of Object.entries(localeTests)) {
+    let dn = new Intl.DisplayNames(locale, {type: "region", style});
+
+    let resolved = dn.resolvedOptions();
+    assertEq(resolved.locale, locale);
+    assertEq(resolved.style, style);
+    assertEq(resolved.type, "region");
+    assertEq(resolved.fallback, "code");
+
+    let inheritedTests = {...localeTests.long, ...localeTests.short, ...localeTests.narrow};
+    for (let [region, expected] of Object.entries({...inheritedTests, ...styleTests})) {
+      assertEq(dn.of(region), expected);
+
+      // Also works with objects.
+      assertEq(dn.of(Object(region)), expected);
+    }
+  }
+}
+
+{
+  let dn = new Intl.DisplayNames("en", {type: "region"});
+
+  // Performs ToString on the input and then validates the stringified result.
+  assertThrowsInstanceOf(() => dn.of(), RangeError);
+  assertThrowsInstanceOf(() => dn.of(null), RangeError);
+  assertThrowsInstanceOf(() => dn.of(Symbol()), TypeError);
+  assertThrowsInstanceOf(() => dn.of(0), RangeError);
+
+  // Throws an error if |code| can't be parsed as a `unicode_region_subtag` production.
+  assertThrowsInstanceOf(() => dn.of("CA-"), RangeError);
+  assertThrowsInstanceOf(() => dn.of("en-CA"), RangeError);
+}
+
+// Test fallback behaviour.
+{
+  let dn1 = new Intl.DisplayNames("en", {type: "region"});
+  let dn2 = new Intl.DisplayNames("en", {type: "region", fallback: "code"});
+  let dn3 = new Intl.DisplayNames("en", {type: "region", fallback: "none"});
+
+  assertEq(dn1.resolvedOptions().fallback, "code");
+  assertEq(dn2.resolvedOptions().fallback, "code");
+  assertEq(dn3.resolvedOptions().fallback, "none");
+
+  // "AA" is not a registered region code.
+  assertEq(dn1.of("AA"), "AA");
+  assertEq(dn2.of("AA"), "AA");
+  assertEq(dn3.of("AA"), undefined);
+
+  // The returned fallback is in canonical case.
+  assertEq(dn1.of("aa"), "AA");
+  assertEq(dn2.of("aa"), "AA");
+  assertEq(dn3.of("aa"), undefined);
+
+  // "998" is canonicalised to "XZ", but "XZ" has no localised names.
+  assertEq(new Intl.Locale("und-998").region, "XZ");
+
+  // Ensure we return the input and not the canonicalised input.
+  assertEq(dn1.of("998"), "998");
+  assertEq(dn2.of("998"), "998");
+  assertEq(dn3.of("998"), undefined);
+
+  // "XZ" should be consistent with "998".
+  assertEq(dn1.of("XZ"), "XZ");
+  assertEq(dn2.of("XZ"), "XZ");
+  assertEq(dn3.of("XZ"), undefined);
+}
+
+// Ensure language tag canonicalisation is performed.
+{
+  let dn = new Intl.DisplayNames("en", {type: "region", fallback: "none"});
+
+  assertEq(dn.of("RU"), "Russia");
+
+  // ICU's canonicalisation supports "SU" -> "RU".
+  assertEq(Intl.getCanonicalLocales("ru-SU")[0], "ru-RU");
+  assertEq(dn.of("SU"), "Russia");
+
+  // ICU's canonicalisation doesn't support "172" -> "RU".
+  assertEq(Intl.getCanonicalLocales("ru-172")[0], "ru-RU");
+  assertEq(dn.of("172"), "Russia");
+}
+
+// Test when case isn't canonical.
+{
+  let dn = new Intl.DisplayNames("en", {type: "region", fallback: "none"});
+
+  assertEq(dn.of("IT"), "Italy");
+  assertEq(dn.of("it"), "Italy");
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);