1 files changed, 102 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/NumberFormat/rounding-increment.js b/js/src/tests/non262/Intl/NumberFormat/rounding-increment.js
new file mode 100644
index 0000000000..84d4480227
--- /dev/null
+++ b/js/src/tests/non262/Intl/NumberFormat/rounding-increment.js
@@ -0,0 +1,102 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl")||release_or_beta)
+
+// Nickel rounding.
+{
+  let nf = new Intl.NumberFormat("en", {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+    roundingIncrement: 5,
+  });
+
+  assertEq(nf.format(1.22), "1.20");
+  assertEq(nf.format(1.224), "1.20");
+  assertEq(nf.format(1.225), "1.25");
+  assertEq(nf.format(1.23), "1.25");
+}
+
+// Dime rounding.
+{
+  let nf = new Intl.NumberFormat("en", {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+    roundingIncrement: 10,
+  });
+
+  assertEq(nf.format(1.24), "1.20");
+  assertEq(nf.format(1.249), "1.20");
+  assertEq(nf.format(1.250), "1.30");
+  assertEq(nf.format(1.25), "1.30");
+}
+
+// Rounding increment option is rounded down.
+{
+  let nf1 = new Intl.NumberFormat("en", {
+    minimumFractionDigits: 0,
+    maximumFractionDigits: 0,
+    roundingIncrement: 10,
+  });
+
+  let nf2 = new Intl.NumberFormat("en", {
+    minimumFractionDigits: 0,
+    maximumFractionDigits: 0,
+    roundingIncrement: 10.1,
+  });
+
+  let nf3 = new Intl.NumberFormat("en", {
+    minimumFractionDigits: 0,
+    maximumFractionDigits: 0,
+    roundingIncrement: 10.9,
+  });
+
+  assertEq(nf1.resolvedOptions().roundingIncrement, 10);
+  assertEq(nf2.resolvedOptions().roundingIncrement, 10);
+  assertEq(nf3.resolvedOptions().roundingIncrement, 10);
+
+  assertEq(nf1.format(123), "120");
+  assertEq(nf2.format(123), "120");
+  assertEq(nf3.format(123), "120");
+}
+
+// |minimumFractionDigits| must be equal to |maximumFractionDigits| when
+// |roundingIncrement| is used.
+//
+// |minimumFractionDigits| defaults to zero.
+{
+  let nf = new Intl.NumberFormat("en", {
+    roundingIncrement: 10,
+    // minimumFractionDigits: 0, (default)
+    maximumFractionDigits: 0,
+  });
+
+  let resolved = nf.resolvedOptions();
+  assertEq(resolved.minimumFractionDigits, 0);
+  assertEq(resolved.maximumFractionDigits, 0);
+  assertEq(resolved.roundingIncrement, 10);
+
+  assertEq(nf.format(123), "120");
+  assertEq(nf.format(123.456), "120");
+}
+
+// |maximumFractionDigits| defaults to three. And because |0 !== 3|, a
+// RangeError is thrown.
+{
+  let options = {
+    roundingIncrement: 10,
+    // minimumFractionDigits: 0, (default)
+    // maximumFractionDigits: 3, (default)
+  };
+  assertThrowsInstanceOf(() => new Intl.NumberFormat("en", options), RangeError);
+}
+
+// Invalid values.
+for (let roundingIncrement of [-1, 0, Infinity, NaN]){
+  let options = {
+    roundingIncrement,
+    minimumFractionDigits: 0,
+    maximumFractionDigits: 0,
+  };
+  assertThrowsInstanceOf(() => new Intl.NumberFormat("en", options), RangeError);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);