1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/duration-argument-string-negative-fractional-units.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/duration-argument-string-negative-fractional-units.js
new file mode 100644
index 0000000000..e1b7dd7116
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/duration-argument-string-negative-fractional-units.js
@@ -0,0 +1,21 @@
+// |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.calendar.prototype.dateadd
+description: Strings with fractional duration units are treated with the correct sign
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const calendar = new Temporal.Calendar("iso8601");
+const instance = new Temporal.PlainDate(2000, 5, 2, calendar);
+
+const resultHours = calendar.dateAdd(instance, "-PT24.567890123H");
+TemporalHelpers.assertPlainDate(resultHours, 2000, 5, "M05", 1, "negative fractional hours");
+
+const resultMinutes = calendar.dateAdd(instance, "-PT1440.567890123M");
+TemporalHelpers.assertPlainDate(resultMinutes, 2000, 5, "M05", 1, "negative fractional minutes");
+
+reportCompare(0, 0);