1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date.js
new file mode 100644
index 0000000000..edb6f55093
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date.js
@@ -0,0 +1,58 @@
+// |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.daysinmonth
+description: >
+  Temporal.Calendar.prototype.daysInMonth will take Temporal.PlainDate object
+  and return the number of days in that month.
+info: |
+  5. Return 𝔽(! ISODaysInMonth(temporalDateLike.[[ISOYear]], temporalDateLike.[[ISOMonth]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+let d = new Temporal.PlainDate(2021, 1, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 1, 15)) must return 31');
+
+// non-leap year
+d = new Temporal.PlainDate(2021, 2, 15);
+assert.sameValue(cal.daysInMonth(d), 28, 'cal.daysInMonth(new Temporal.PlainDate(2021, 2, 15)) must return 28');
+
+// leap year
+d = new Temporal.PlainDate(2020, 2, 15);
+assert.sameValue(cal.daysInMonth(d), 29, 'cal.daysInMonth(new Temporal.PlainDate(2020, 2, 15)) must return 29');
+d = new Temporal.PlainDate(2000, 2, 15);
+assert.sameValue(cal.daysInMonth(d), 29, 'cal.daysInMonth(new Temporal.PlainDate(2000, 2, 15)) must return 29');
+
+d = new Temporal.PlainDate(2021, 3, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 3, 15)) must return 31');
+
+d = new Temporal.PlainDate(2021, 4, 15);
+assert.sameValue(cal.daysInMonth(d), 30, 'cal.daysInMonth(new Temporal.PlainDate(2021, 4, 15)) must return 30');
+
+d = new Temporal.PlainDate(2021, 5, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 5, 15)) must return 31');
+
+d = new Temporal.PlainDate(2021, 6, 15);
+assert.sameValue(cal.daysInMonth(d), 30, 'cal.daysInMonth(new Temporal.PlainDate(2021, 6, 15)) must return 30');
+
+d = new Temporal.PlainDate(2021, 7, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 7, 15)) must return 31');
+
+d = new Temporal.PlainDate(2021, 8, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 8, 15)) must return 31');
+
+d = new Temporal.PlainDate(2021, 9, 15);
+assert.sameValue(cal.daysInMonth(d), 30, 'cal.daysInMonth(new Temporal.PlainDate(2021, 9, 15)) must return 30');
+
+d = new Temporal.PlainDate(2021, 10, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 10, 15)) must return 31');
+
+d = new Temporal.PlainDate(2021, 11, 15);
+assert.sameValue(cal.daysInMonth(d), 30, 'cal.daysInMonth(new Temporal.PlainDate(2021, 11, 15)) must return 30');
+
+d = new Temporal.PlainDate(2021, 12, 15);
+assert.sameValue(cal.daysInMonth(d), 31, 'cal.daysInMonth(new Temporal.PlainDate(2021, 12, 15)) must return 31');
+
+reportCompare(0, 0);