date-fns/_lib/parseISO/sydney.js

Modern JavaScript date utility library

// This is basic DST test for parseISO

import { parseISO } from "../../parseISO.js";
import assert from "./node:assert";

if (process.env.TZ !== "Australia/Sydney")
  throw new Error("The test must be run with TZ=Australia/Sydney");

if (parseInt(process.version.match(/^v(\d+)\./)?.[1] || "0") < 10)
  throw new Error("The test must be run on Node.js version >= 10");

// Test DST start edge
assert.strictEqual(parseISO("2019-10-06").getDate(), 6); // DST start
assert.strictEqual(parseISO("2019-10-07").getDate(), 7);
assert.strictEqual(
  parseISO("2019-10-06T01:00:00").toString(),
  "Sun Oct 06 2019 01:00:00 GMT+1000 (Australian Eastern Standard Time)",
);
assert.strictEqual(
  parseISO("2019-10-06T02:00:00").toString(),
  "Sun Oct 06 2019 03:00:00 GMT+1100 (Australian Eastern Daylight Time)",
);

assert.strictEqual(
  parseISO("2019-10-06T05:00:00").toString(),
  "Sun Oct 06 2019 05:00:00 GMT+1100 (Australian Eastern Daylight Time)",
);

// Test DST end edge
assert.strictEqual(parseISO("2019-04-06").getDate(), 6);
assert.strictEqual(parseISO("2019-04-07").getDate(), 7); // DST end
assert.strictEqual(
  parseISO("2019-04-06T11:00:00").toString(),
  "Sat Apr 06 2019 11:00:00 GMT+1100 (Australian Eastern Daylight Time)",
);
assert.strictEqual(
  parseISO("2019-04-07T11:00:00").toString(),
  "Sun Apr 07 2019 11:00:00 GMT+1000 (Australian Eastern Standard Time)",
);

assert.strictEqual(
  parseISO("2019-04-07T00:00:00").toString(),
  "Sun Apr 07 2019 00:00:00 GMT+1100 (Australian Eastern Daylight Time)",
);

// test edge cases for months, years
assert.strictEqual(
  parseISO("2020-01-01T00:00:00").toString(),
  "Wed Jan 01 2020 00:00:00 GMT+1100 (Australian Eastern Daylight Time)",
);
assert.strictEqual(
  parseISO("2019-12-31T23:59:59").toString(),
  "Tue Dec 31 2019 23:59:59 GMT+1100 (Australian Eastern Daylight Time)",
);
assert.strictEqual(
  parseISO("2020-02-29T23:59:59").toString(),
  "Sat Feb 29 2020 23:59:59 GMT+1100 (Australian Eastern Daylight Time)",
);