1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/String/toLocaleLowerCase.js b/js/src/tests/non262/Intl/String/toLocaleLowerCase.js
new file mode 100644
index 0000000000..bd81717d22
--- /dev/null
+++ b/js/src/tests/non262/Intl/String/toLocaleLowerCase.js
@@ -0,0 +1,64 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+// Test language dependent special casing with different language tags.
+for (let locale of ["tr", "TR", "tr-TR", "tr-u-co-search", "tr-x-turkish"]) {
+    assertEq("\u0130".toLocaleLowerCase(locale), "i");
+    assertEq("\u0130".toLocaleLowerCase([locale]), "i");
+
+    // Additional language tags are ignored.
+    assertEq("\u0130".toLocaleLowerCase([locale, "und"]), "i");
+    assertEq("\u0130".toLocaleLowerCase(["und", locale]), "\u0069\u0307");
+}
+
+// Ensure "trl" (Traveller Scottish) isn't misrecognized as "tr", even though
+// both share the same prefix.
+assertEq("\u0130".toLocaleLowerCase("trl"), "\u0069\u0307");
+assertEq("\u0130".toLocaleLowerCase(["trl"]), "\u0069\u0307");
+
+// Language tag is always verified.
+for (let locale of ["no_locale", "tr-invalid_ext", ["no_locale"], ["en", "no_locale"]]) {
+    // Empty input string.
+    assertThrowsInstanceOf(() => "".toLocaleLowerCase(locale), RangeError);
+
+    // Non-empty input string.
+    assertThrowsInstanceOf(() => "x".toLocaleLowerCase(locale), RangeError);
+}
+
+// No locale argument, undefined as locale, and empty array or array-like all
+// return the same result. Testing with "a/A" because it has only simple case
+// mappings.
+assertEq("A".toLocaleLowerCase(), "a");
+assertEq("A".toLocaleLowerCase(undefined), "a");
+assertEq("A".toLocaleLowerCase([]), "a");
+assertEq("A".toLocaleLowerCase({}), "a");
+assertEq("A".toLocaleLowerCase({length: 0}), "a");
+assertEq("A".toLocaleLowerCase({length: -1}), "a");
+
+// Test with incorrect locale type.
+for (let locale of [null, 0, Math.PI, NaN, Infinity, true, false, Symbol()]) {
+    // Empty input string.
+    assertThrowsInstanceOf(() => "".toLocaleLowerCase([locale]), TypeError);
+
+    // Non-empty input string.
+    assertThrowsInstanceOf(() => "A".toLocaleLowerCase([locale]), TypeError);
+}
+
+// Primitives are converted with ToObject and then queried for .length property.
+for (let locale of [null]) {
+    // Empty input string.
+    assertThrowsInstanceOf(() => "".toLocaleLowerCase([locale]), TypeError);
+
+    // Non-empty input string.
+    assertThrowsInstanceOf(() => "A".toLocaleLowerCase([locale]), TypeError);
+}
+// ToLength(ToObject(<primitive>)) returns 0.
+for (let locale of [0, Math.PI, NaN, Infinity, true, false, Symbol()]) {
+    // Empty input string.
+    assertEq("".toLocaleLowerCase(locale), "");
+
+    // Non-empty input string.
+    assertEq("A".toLocaleLowerCase(locale), "a");
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");