1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/staging/Intl402/Temporal/old/zoneddatetime-dst-corner-cases.js b/js/src/tests/test262/staging/Intl402/Temporal/old/zoneddatetime-dst-corner-cases.js
new file mode 100644
index 0000000000..d66a8d0715
--- /dev/null
+++ b/js/src/tests/test262/staging/Intl402/Temporal/old/zoneddatetime-dst-corner-cases.js
@@ -0,0 +1,29 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2018 Bloomberg LP. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-zoneddatetime-objects
+description: Corner cases of time zone offset shifts
+features: [Temporal]
+---*/
+
+// hoursInDay works with non-hour DST change
+var zdt1 = Temporal.ZonedDateTime.from("2020-10-04T12:00[Australia/Lord_Howe]");
+assert.sameValue(zdt1.hoursInDay, 23.5);
+var zdt2 = Temporal.ZonedDateTime.from("2020-04-05T12:00[Australia/Lord_Howe]");
+assert.sameValue(zdt2.hoursInDay, 24.5);
+
+// hoursInDay works with non-half-hour DST change
+var zdt = Temporal.ZonedDateTime.from("1933-01-01T12:00[Asia/Singapore]");
+assert(Math.abs(zdt.hoursInDay - 23.666666666666668) < Number.EPSILON);
+
+// hoursInDay works when day starts at 1:00 due to DST start at midnight
+var zdt = Temporal.ZonedDateTime.from("2015-10-18T12:00:00-02:00[America/Sao_Paulo]");
+assert.sameValue(zdt.hoursInDay, 23);
+
+// startOfDay works when day starts at 1:00 due to DST start at midnight
+var zdt = Temporal.ZonedDateTime.from("2015-10-18T12:00:00-02:00[America/Sao_Paulo]");
+assert.sameValue(`${ zdt.startOfDay().toPlainTime() }`, "01:00:00");
+
+reportCompare(0, 0);