1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/monthCode/year-month.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/monthCode/year-month.js
new file mode 100644
index 0000000000..c0b553658e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/monthCode/year-month.js
@@ -0,0 +1,23 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.monthCode
+description: >
+  Temporal.Calendar.prototype.monthCode will take PlainYearMonth and return
+  the value of the monthCode.
+info: |
+  6. Return ! ISOMonthCode(temporalDateLike).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+let yearMonth = new Temporal.PlainYearMonth(1999, 6);
+assert.sameValue(
+  cal.monthCode(yearMonth),
+  "M06",
+  'cal.monthCode(new Temporal.PlainYearMonth(1999, 6)) must return "M06"'
+);
+
+reportCompare(0, 0);