Split addition-across-lunisolar-leap-months across calendars

Also remove unnecessary check for out-dated Chinese calendar data.

Author: anba

test/staging/Intl402/Temporal/old/addition-across-lunisolar-leap-months-chinese.js

@@ -0,0 +1,49 @@
+// Copyright (C) 2018 Bloomberg LP. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-intl
+description: Addition across lunisolar leap months
+features: [Temporal]
+---*/
+
+const chineseYearOffset = new Temporal.PlainDate(1, 1, 1, "chinese").year;
+
+// Adding years across Chinese leap month
+var date = Temporal.PlainDate.from({
+  year: 2000 + chineseYearOffset,
+  monthCode: "M08",
+  day: 2,
+  calendar: "chinese"
+});
+var added = date.add({ years: 1 });
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 1);
+
+// Adding months across Chinese leap month
+var date = Temporal.PlainDate.from({
+  year: 2000 + chineseYearOffset,
+  monthCode: "M08",
+  day: 2,
+  calendar: "chinese"
+});
+var added = date.add({ months: 13 });
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 1);
+
+// Adding months and years across Chinese leap month
+var date = Temporal.PlainDate.from({
+  year: 2001 + chineseYearOffset,
+  monthCode: "M08",
+  day: 2,
+  calendar: "chinese"
+});
+var added = date.add({
+  years: 1,
+  months: 12
+});
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 2);

test/staging/Intl402/Temporal/old/addition-across-lunisolar-leap-months-hebrew.js

@@ -0,0 +1,47 @@
+// Copyright (C) 2018 Bloomberg LP. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-intl
+description: Addition across lunisolar leap months
+features: [Temporal]
+---*/
+
+// Adding years across Hebrew leap month
+var date = Temporal.PlainDate.from({
+  year: 5783,
+  monthCode: "M08",
+  day: 2,
+  calendar: "hebrew"
+});
+var added = date.add({ years: 1 });
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 1);
+
+// Adding months across Hebrew leap month
+var date = Temporal.PlainDate.from({
+  year: 5783,
+  monthCode: "M08",
+  day: 2,
+  calendar: "hebrew"
+});
+var added = date.add({ months: 13 });
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 1);
+
+// Adding months and years across Hebrew leap month
+var date = Temporal.PlainDate.from({
+  year: 5783,
+  monthCode: "M08",
+  day: 2,
+  calendar: "hebrew"
+});
+var added = date.add({
+  years: 1,
+  months: 12
+});
+assert.sameValue(added.day, date.day);
+assert.sameValue(added.monthCode, date.monthCode);
+assert.sameValue(added.year, date.year + 2);