1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/supportedValuesOf-unit.js b/js/src/tests/non262/Intl/supportedValuesOf-unit.js
new file mode 100644
index 0000000000..01dc5bb05c
--- /dev/null
+++ b/js/src/tests/non262/Intl/supportedValuesOf-unit.js
@@ -0,0 +1,20 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+const units = Intl.supportedValuesOf("unit");
+
+assertEq(new Set(units).size, units.length, "No duplicates are present");
+assertEqArray(units, [...units].sort(), "The list is sorted");
+
+const unitRE = /^[a-z]+(-[a-z]+)*$/;
+for (let unit of units) {
+  assertEq(unitRE.test(unit), true, `${unit} is ASCII lower-case, separated by hyphens`);
+  assertEq(unit.includes("-per-"), false, `${unit} is a simple unit identifier`);
+}
+
+for (let unit of units) {
+  let obj = new Intl.NumberFormat("en", {style: "unit", unit});
+  assertEq(obj.resolvedOptions().unit, unit, `${unit} is supported by NumberFormat`);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);