1 files changed, 116 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date-time.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date-time.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInMonth/plain-date-time.js
@@ -0,0 +1,116 @@
+// |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.PlainDateTime object
+  and return the number of days in that month.
+info: |
+  4. If Type(temporalDateLike) is not Object or temporalDateLike does not have an [[InitializedTemporalDate]] or [[InitializedTemporalYearMonth]] internal slots, then
+    a. Set temporalDateLike to ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ISODaysInMonth(temporalDateLike.[[ISOYear]], temporalDateLike.[[ISOMonth]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+let dt = new Temporal.PlainDateTime(1997, 1, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 1, 23, 5, 30, 13)) must return 31'
+);
+
+// leap year
+dt = new Temporal.PlainDateTime(1996, 2, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  29,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1996, 2, 23, 5, 30, 13)) must return 29'
+);
+dt = new Temporal.PlainDateTime(2000, 2, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  29,
+  'cal.daysInMonth(new Temporal.PlainDateTime(2000, 2, 23, 5, 30, 13)) must return 29'
+);
+
+// non leap year
+dt = new Temporal.PlainDateTime(1997, 2, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  28,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 2, 23, 5, 30, 13)) must return 28'
+);
+
+dt = new Temporal.PlainDateTime(1997, 3, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 3, 23, 5, 30, 13)) must return 31'
+);
+
+dt = new Temporal.PlainDateTime(1997, 4, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  30,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 4, 23, 5, 30, 13)) must return 30'
+);
+
+dt = new Temporal.PlainDateTime(1997, 5, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 5, 23, 5, 30, 13)) must return 31'
+);
+
+dt = new Temporal.PlainDateTime(1997, 6, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  30,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 6, 23, 5, 30, 13)) must return 30'
+);
+
+dt = new Temporal.PlainDateTime(1997, 7, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 7, 23, 5, 30, 13)) must return 31'
+);
+
+dt = new Temporal.PlainDateTime(1997, 8, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 8, 23, 5, 30, 13)) must return 31'
+);
+
+dt = new Temporal.PlainDateTime(1997, 9, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  30,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 9, 23, 5, 30, 13)) must return 30'
+);
+
+dt = new Temporal.PlainDateTime(1997, 10, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 10, 23, 5, 30, 13)) must return 31'
+);
+
+dt = new Temporal.PlainDateTime(1997, 11, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  30,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 11, 23, 5, 30, 13)) must return 30'
+);
+
+dt = new Temporal.PlainDateTime(1997, 12, 23, 5, 30, 13);
+assert.sameValue(
+  cal.daysInMonth(dt),
+  31,
+  'cal.daysInMonth(new Temporal.PlainDateTime(1997, 12, 23, 5, 30, 13)) must return 31'
+);
+
+reportCompare(0, 0);