1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInYear/string.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInYear/string.js
new file mode 100644
index 0000000000..f1697e8fc9
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/daysInYear/string.js
@@ -0,0 +1,26 @@
+// |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.daysinyear
+description: >
+  Temporal.Calendar.prototype.daysInYear will take PlainDate and return
+  the number of days in a year.
+info: |
+  4. If Type(temporalDateLike) is not Object or temporalDateLike does not have an [[InitializedTemporalDate]] or [[InitializedTemporalYearMonth]] internal slot, then
+    a. Set temporalDateLike to ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ISODaysInYear(temporalDateLike.[[ISOYear]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(cal.daysInYear("2019-03-18"), 365, 'cal.daysInYear("2019-03-18") must return 365');
+assert.sameValue(cal.daysInYear("2020-03-18"), 366, 'cal.daysInYear("2020-03-18") must return 366');
+assert.sameValue(cal.daysInYear("2021-03-18"), 365, 'cal.daysInYear("2021-03-18") must return 365');
+assert.sameValue(cal.daysInYear("2022-03-18"), 365, 'cal.daysInYear("2022-03-18") must return 365');
+assert.sameValue(cal.daysInYear("2023-03-18"), 365, 'cal.daysInYear("2023-03-18") must return 365');
+assert.sameValue(cal.daysInYear("2024-03-18"), 366, 'cal.daysInYear("2024-03-18") must return 366');
+assert.sameValue(cal.daysInYear("2025-03-18"), 365, 'cal.daysInYear("2025-03-18") must return 365');
+assert.sameValue(cal.daysInYear("2026-03-18"), 365, 'cal.daysInYear("2026-03-18") must return 365');
+
+reportCompare(0, 0);