1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/yearMonthFromFields/basic.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/yearMonthFromFields/basic.js
new file mode 100644
index 0000000000..65e6b5888f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/yearMonthFromFields/basic.js
@@ -0,0 +1,43 @@
+// |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.yearmonthfromfields
+description: Temporal.Calendar.prototype.yearMonthFromFields return correctly with valid data.
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. If Type(fields) is not Object, throw a TypeError exception.
+  5. Set options to ? GetOptionsObject(options).
+  6. Let result be ? ISOYearMonthFromFields(fields, options).
+  7. Return ? CreateTemporalYearMonth(result.[[Year]], result.[[Month]], calendar, result.[[ReferenceISODay]]).
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const cal = new Temporal.Calendar("iso8601")
+
+let result = cal.yearMonthFromFields({ year: 2021, month: 7 });
+TemporalHelpers.assertPlainYearMonth(result, 2021, 7, "M07", "year 2021, month 7");
+result = cal.yearMonthFromFields({ year: 2021, month: 12 });
+TemporalHelpers.assertPlainYearMonth(result, 2021, 12, "M12", "year 2021, month 12");
+result = cal.yearMonthFromFields({ year: 2021, monthCode: "M07" });
+TemporalHelpers.assertPlainYearMonth(result, 2021, 7, "M07", "year 2021, monthCode M07");
+result = cal.yearMonthFromFields({ year: 2021, monthCode: "M12" });
+TemporalHelpers.assertPlainYearMonth(result, 2021, 12, "M12", "year 2021, monthCode M12");
+
+["constrain", "reject"].forEach((overflow) => {
+  const opt = { overflow };
+  result = cal.yearMonthFromFields({ year: 2021, month: 7 }, opt);
+  TemporalHelpers.assertPlainYearMonth(result, 2021, 7, "M07", `year 2021, month 7, overflow ${overflow}`);
+  result = cal.yearMonthFromFields({ year: 2021, month: 12 }, opt);
+  TemporalHelpers.assertPlainYearMonth(result, 2021, 12, "M12", `year 2021, month 12, overflow ${overflow}`);
+  result = cal.yearMonthFromFields({ year: 2021, monthCode: "M07" }, opt);
+  TemporalHelpers.assertPlainYearMonth(result, 2021, 7, "M07", `year 2021, monthCode M07, overflow ${overflow}`);
+  result = cal.yearMonthFromFields({ year: 2021, monthCode: "M12" }, opt);
+  TemporalHelpers.assertPlainYearMonth(result, 2021, 12, "M12", `year 2021, monthCode M12, overflow ${overflow}`);
+});
+
+reportCompare(0, 0);