date-fns/_lib/parseISO/basic.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 !== "America/Sao_Paulo")
  throw new Error("The test must be run with TZ=America/Sao_Paulo");

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("2018-11-03").getDate(), 3);
assert.strictEqual(parseISO("2018-11-04").getDate(), 4); // DST start
assert.strictEqual(parseISO("2018-11-05").getDate(), 5);

// Test DST end edge
assert.strictEqual(parseISO("2019-02-15").getDate(), 15);
assert.strictEqual(parseISO("2019-02-16").getDate(), 16); // DST end
assert.strictEqual(parseISO("2019-02-17").getDate(), 17);

// Test creation of nonexistent time
assert.strictEqual(
  parseISO("2018-11-04T00:00").toString(),
  "Sun Nov 04 2018 01:00:00 GMT-0200 (Brasilia Summer Time)",
);
assert.strictEqual(
  parseISO("2018-11-04T00:30").toString(),
  "Sun Nov 04 2018 01:30:00 GMT-0200 (Brasilia Summer Time)",
);