1 files changed, 84 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/PluralRules/selectRange.js b/js/src/tests/non262/Intl/PluralRules/selectRange.js
new file mode 100644
index 0000000000..59faf621e2
--- /dev/null
+++ b/js/src/tests/non262/Intl/PluralRules/selectRange.js
@@ -0,0 +1,84 @@
+// |reftest| skip-if(!this.hasOwnProperty('Intl')||release_or_beta)
+
+// Any combination returns "other" for "en-US".
+{
+  let numbers = [0, 0.5, 1.2, 1.5, 1.7, -1, 1, "1", 123456789.123456789, Infinity, -Infinity];
+
+  const weirdCases = [
+    NaN,
+    "word",
+    [0, 2],
+    {},
+  ];
+
+  for (let type of ["ordinal", "cardinal"]) {
+    let pr = new Intl.PluralRules("en-US", {type});
+    for (let start of numbers) {
+      for (let end of numbers) {
+        assertEq(pr.selectRange(start, end), "other");
+      }
+    }
+
+    for (let c of weirdCases) {
+      assertThrowsInstanceOf(() => pr.selectRange(c, 0), RangeError);
+      assertThrowsInstanceOf(() => pr.selectRange(0, c), RangeError);
+      assertThrowsInstanceOf(() => pr.selectRange(c, c), RangeError);
+    }
+  }
+}
+
+// fr (French) returns different results.
+{
+  let ordinal = new Intl.PluralRules("fr", {type: "ordinal"});
+  let cardinal = new Intl.PluralRules("fr", {type: "cardinal"});
+
+  assertEq(ordinal.selectRange(1, 1), "one");
+  assertEq(ordinal.selectRange(0, 1), "other");
+
+  assertEq(cardinal.selectRange(1, 1), "one");
+  assertEq(cardinal.selectRange(0, 1), "one");
+}
+
+// cy (Cymraeg) can return any combination.
+{
+  let ordinal = new Intl.PluralRules("cy", {type: "ordinal"});
+
+  assertEq(ordinal.selectRange(0, 0), "other");
+  assertEq(ordinal.selectRange(0, 1), "one");
+  assertEq(ordinal.selectRange(0, 2), "two");
+  assertEq(ordinal.selectRange(0, 3), "few");
+  assertEq(ordinal.selectRange(0, 5), "many");
+  assertEq(ordinal.selectRange(0, 10), "other");
+
+  assertEq(ordinal.selectRange(1, 1), "other");
+  assertEq(ordinal.selectRange(1, 2), "two");
+  assertEq(ordinal.selectRange(1, 3), "few");
+  assertEq(ordinal.selectRange(1, 5), "many");
+  assertEq(ordinal.selectRange(1, 10), "other");
+
+  assertEq(ordinal.selectRange(2, 2), "other");
+  assertEq(ordinal.selectRange(2, 3), "few");
+  assertEq(ordinal.selectRange(2, 5), "many");
+  assertEq(ordinal.selectRange(2, 10), "other");
+
+  assertEq(ordinal.selectRange(3, 3), "other");
+  assertEq(ordinal.selectRange(3, 5), "many");
+  assertEq(ordinal.selectRange(3, 10), "other");
+
+  assertEq(ordinal.selectRange(5, 5), "other");
+  assertEq(ordinal.selectRange(5, 10), "other");
+
+  assertEq(ordinal.selectRange(10, 10), "other");
+}
+
+// BigInt inputs aren't allowed.
+{
+  let pr = new Intl.PluralRules("en-US");
+
+  assertThrowsInstanceOf(() => pr.selectRange(0, 0n), TypeError);
+  assertThrowsInstanceOf(() => pr.selectRange(0n, 0), TypeError);
+  assertThrowsInstanceOf(() => pr.selectRange(0n, 0n), TypeError);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);