From 99aa2c22ec682dce7ee3365e5eedb9dce362d0ac Mon Sep 17 00:00:00 2001
From: Ben Allen <benallen@igalia.com>
Date: Mon, 3 Nov 2025 01:17:23 -0800
Subject: [PATCH] Add test to verify era aliases for non-gregorian calendars
 (#4631)

---
 .../canonicalize-era-codes-non-gregorian.js   | 26 ++++++++++++++++++
 .../canonicalize-era-codes-non-gregorian.js   | 26 ++++++++++++++++++
 .../canonicalize-era-codes-non-gregorian.js   | 26 ++++++++++++++++++
 .../canonicalize-era-codes-non-gregorian.js   | 27 +++++++++++++++++++
 4 files changed, 105 insertions(+)
 create mode 100644 test/intl402/Temporal/PlainDate/from/canonicalize-era-codes-non-gregorian.js
 create mode 100644 test/intl402/Temporal/PlainDateTime/from/canonicalize-era-codes-non-gregorian.js
 create mode 100644 test/intl402/Temporal/PlainYearMonth/from/canonicalize-era-codes-non-gregorian.js
 create mode 100644 test/intl402/Temporal/ZonedDateTime/from/canonicalize-era-codes-non-gregorian.js

diff --git a/test/intl402/Temporal/PlainDate/from/canonicalize-era-codes-non-gregorian.js b/test/intl402/Temporal/PlainDate/from/canonicalize-era-codes-non-gregorian.js
new file mode 100644
index 0000000000..7af94acef1
--- /dev/null
+++ b/test/intl402/Temporal/PlainDate/from/canonicalize-era-codes-non-gregorian.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-calendarsupportsera
+description: Calendar era code is canonicalized (non-Gregorian calendars)
+features: [Temporal, Intl.Era-monthcode]
+---*/
+
+
+const calendarEraAliases = [
+  { calendar: "japanese", canonicalizedEra: "ce", alias: "ad" },
+  { calendar: "japanese", canonicalizedEra: "bce", alias: "bc" }
+];
+
+
+for (const calendarEraAlias of calendarEraAliases) {
+  const calendar = Temporal.PlainDate.from({
+    calendar: calendarEraAlias.calendar,
+    era: calendarEraAlias.alias,
+    eraYear: 1,
+    month: 1,
+    day: 1
+  });
+  assert.sameValue(calendar.era, calendarEraAlias.canonicalizedEra, calendar.era + " should canonicalize to " + calendarEraAlias.canonicalizedEra)
+}
diff --git a/test/intl402/Temporal/PlainDateTime/from/canonicalize-era-codes-non-gregorian.js b/test/intl402/Temporal/PlainDateTime/from/canonicalize-era-codes-non-gregorian.js
new file mode 100644
index 0000000000..a397636d7a
--- /dev/null
+++ b/test/intl402/Temporal/PlainDateTime/from/canonicalize-era-codes-non-gregorian.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.from
+description: Calendar era code is canonicalized (non-Gregorian calendars)
+features: [Temporal, Intl.Era-monthcode]
+---*/
+
+
+const calendarEraAliases = [
+  { calendar: "japanese", canonicalizedEra: "ce", alias: "ad" },
+  { calendar: "japanese", canonicalizedEra: "bce", alias: "bc" }
+];
+
+
+for (const calendarEraAlias of calendarEraAliases) {
+  const calendar = Temporal.PlainDateTime.from({
+    calendar: calendarEraAlias.calendar,
+    era: calendarEraAlias.alias,
+    eraYear: 1,
+    month: 1,
+    day: 1
+  });
+  assert.sameValue(calendar.era, calendarEraAlias.canonicalizedEra, calendar.era + " should canonicalize to " + calendarEraAlias.canonicalizedEra)
+}
diff --git a/test/intl402/Temporal/PlainYearMonth/from/canonicalize-era-codes-non-gregorian.js b/test/intl402/Temporal/PlainYearMonth/from/canonicalize-era-codes-non-gregorian.js
new file mode 100644
index 0000000000..acc42b8803
--- /dev/null
+++ b/test/intl402/Temporal/PlainYearMonth/from/canonicalize-era-codes-non-gregorian.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-plainyearmonth.from
+description: Calendar era code is canonicalized (non-Gregorian calendars)
+features: [Temporal, Intl.Era-monthcode]
+---*/
+
+
+const calendarEraAliases = [
+  { calendar: "japanese", canonicalizedEra: "ce", alias: "ad" },
+  { calendar: "japanese", canonicalizedEra: "bce", alias: "bc" }
+];
+
+
+for (const calendarEraAlias of calendarEraAliases) {
+  const calendar = Temporal.PlainYearMonth.from({
+    calendar: calendarEraAlias.calendar,
+    era: calendarEraAlias.alias,
+    eraYear: 1,
+    month: 1,
+    day: 1
+  });
+  assert.sameValue(calendar.era, calendarEraAlias.canonicalizedEra, calendar.era + " should canonicalize to " + calendarEraAlias.canonicalizedEra)
+}
diff --git a/test/intl402/Temporal/ZonedDateTime/from/canonicalize-era-codes-non-gregorian.js b/test/intl402/Temporal/ZonedDateTime/from/canonicalize-era-codes-non-gregorian.js
new file mode 100644
index 0000000000..61e6ae20c1
--- /dev/null
+++ b/test/intl402/Temporal/ZonedDateTime/from/canonicalize-era-codes-non-gregorian.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2025 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zonedatetime.from
+description: Calendar era code is canonicalized (non-Gregorian calendars)
+features: [Temporal, Intl.Era-monthcode]
+---*/
+
+
+const calendarEraAliases = [
+  { calendar: "japanese", canonicalizedEra: "ce", alias: "ad" },
+  { calendar: "japanese", canonicalizedEra: "bce", alias: "bc" }
+];
+
+
+for (const calendarEraAlias of calendarEraAliases) {
+  const calendar = Temporal.ZonedDateTime.from({
+    calendar: calendarEraAlias.calendar,
+    era: calendarEraAlias.alias,
+    eraYear: 1,
+    month: 1,
+    day: 1,
+    timeZone: "UTC"
+  });
+  assert.sameValue(calendar.era, calendarEraAlias.canonicalizedEra, calendar.era + " should canonicalize to " + calendarEraAlias.canonicalizedEra)
+}