1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/roundingmode-wrong-type.js b/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/roundingmode-wrong-type.js
new file mode 100644
index 0000000000..2d7a86a9c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/PlainTime/prototype/toString/roundingmode-wrong-type.js
@@ -0,0 +1,18 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaintime.prototype.tostring
+description: Type conversions for roundingMode option
+includes: [compareArray.js, temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const time = new Temporal.PlainTime(12, 34, 56, 123, 987, 500);
+TemporalHelpers.checkStringOptionWrongType("roundingMode", "trunc",
+  (roundingMode) => time.toString({ smallestUnit: "microsecond", roundingMode }),
+  (result, descr) => assert.sameValue(result, "12:34:56.123987", descr),
+);
+
+reportCompare(0, 0);