1 files changed, 134 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DisplayNames/script.js b/js/src/tests/non262/Intl/DisplayNames/script.js
new file mode 100644
index 0000000000..43b3ad5308
--- /dev/null
+++ b/js/src/tests/non262/Intl/DisplayNames/script.js
@@ -0,0 +1,134 @@
+// |reftest| skip-if(!this.hasOwnProperty('Intl'))
+
+const tests = {
+  "en": {
+    long: {
+      "Latn": "Latin",
+      "Hant": "Traditional Han",
+      "Hans": "Simplified Han",
+      "Cans": "Unified Canadian Aboriginal Syllabics",
+    },
+    short: {
+      "Hant": "Traditional",
+      "Hans": "Simplified",
+      "Cans": "UCAS",
+    },
+    narrow: {},
+  },
+  "de": {
+    long: {
+      "Latn": "Lateinisch",
+      "Hant": "Traditionelles Chinesisch",
+      "Hans": "Vereinfachtes Chinesisch",
+    },
+    short: {
+      "Hant": "Traditionell",
+      "Hans": "Vereinfacht",
+    },
+    narrow: {},
+  },
+  "fr": {
+    long: {
+      "Latn": "latin",
+      "Hant": "sinogrammes traditionnels",
+      "Hans": "sinogrammes simplifiés",
+    },
+    short: {
+      "Hant": "traditionnel",
+      "Hans": "simplifié",
+    },
+    narrow: {},
+  },
+  "zh": {
+    long: {
+      "Latn": "拉丁文",
+      "Hant": "繁体中文",
+      "Hans": "简体中文",
+    },
+    short: {
+      "Hant": "繁体",
+      "Hans": "简体",
+    },
+    narrow: {},
+  },
+  "ar": {
+    long: {
+      "Latn": "اللاتينية",
+      "Arab": "العربية",
+      "Hant": "الهان التقليدية",
+      "Hans": "الهان المبسطة",
+    },
+    short: {
+      "Hant": "التقليدية",
+      "Hans": "المبسطة",
+    },
+    narrow: {},
+  },
+};
+
+for (let [locale, localeTests] of Object.entries(tests)) {
+  for (let [style, styleTests] of Object.entries(localeTests)) {
+    let dn = new Intl.DisplayNames(locale, {type: "script", style});
+
+    let resolved = dn.resolvedOptions();
+    assertEq(resolved.locale, locale);
+    assertEq(resolved.style, style);
+    assertEq(resolved.type, "script");
+    assertEq(resolved.fallback, "code");
+
+    let inheritedTests = {...localeTests.long, ...localeTests.short, ...localeTests.narrow};
+    for (let [script, expected] of Object.entries({...inheritedTests, ...styleTests})) {
+      assertEq(dn.of(script), expected);
+
+      // Also works with objects.
+      assertEq(dn.of(Object(script)), expected);
+    }
+  }
+}
+
+{
+  let dn = new Intl.DisplayNames("en", {type: "script"});
+
+  // Performs ToString on the input and then validates the stringified result.
+  assertThrowsInstanceOf(() => dn.of(), RangeError);
+  assertThrowsInstanceOf(() => dn.of(Symbol()), TypeError);
+  assertThrowsInstanceOf(() => dn.of(0), RangeError);
+
+  // ToString(null) = "null", which passes `unicode_script_subtag`.
+  dn.of(null); // no error
+
+  // Throws an error if |code| can't be parsed as a `unicode_script_subtag` production.
+  assertThrowsInstanceOf(() => dn.of("latn-"), RangeError);
+  assertThrowsInstanceOf(() => dn.of("en-latn"), RangeError);
+}
+
+// Test fallback behaviour.
+{
+  let dn1 = new Intl.DisplayNames("en", {type: "script"});
+  let dn2 = new Intl.DisplayNames("en", {type: "script", fallback: "code"});
+  let dn3 = new Intl.DisplayNames("en", {type: "script", fallback: "none"});
+
+  assertEq(dn1.resolvedOptions().fallback, "code");
+  assertEq(dn2.resolvedOptions().fallback, "code");
+  assertEq(dn3.resolvedOptions().fallback, "none");
+
+  // "Aaaa" is not a registered script code.
+  assertEq(dn1.of("Aaaa"), "Aaaa");
+  assertEq(dn2.of("Aaaa"), "Aaaa");
+  assertEq(dn3.of("Aaaa"), undefined);
+
+  // The returned fallback is in canonical case.
+  assertEq(dn1.of("aaaa"), "Aaaa");
+  assertEq(dn2.of("aaaa"), "Aaaa");
+  assertEq(dn3.of("aaaa"), undefined);
+}
+
+// Test when case isn't canonical.
+{
+  let dn = new Intl.DisplayNames("en", {type: "script", fallback: "none"});
+
+  assertEq(dn.of("LATN"), "Latin");
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);