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src: make process.env.TZ setter clear tz cache
Since the presence of the libc and V8 timezone caches seem to be a perennial source of confusion to users ("why doesn't it work?!"), let's try to support that pattern by intercepting assignments to the `TZ` environment variable and reset the caches as a side effect. PR-URL: nodejs#20026 Fixes: nodejs#19974 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Tiancheng "Timothy" Gu <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>
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'use strict'; | ||
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const common = require('../common'); | ||
const assert = require('assert'); | ||
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if (common.isWindows) // Using a different TZ format. | ||
common.skip('todo: test on Windows'); | ||
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if (common.isAIX || common.isSunOS) // Reports 2018 CEST as CET. | ||
common.skip('tzdata too old'); | ||
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const date = new Date('2018-04-14T12:34:56.789Z'); | ||
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process.env.TZ = 'Europe/Amsterdam'; | ||
if (/\(Europe\)/.test(date.toString())) | ||
common.skip('not using bundled ICU'); // Shared library or --with-intl=none. | ||
assert.strictEqual(date.toString(), 'Sat Apr 14 2018 14:34:56 GMT+0200 (CEST)'); | ||
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process.env.TZ = 'Europe/London'; | ||
assert.strictEqual(date.toString(), 'Sat Apr 14 2018 13:34:56 GMT+0100 (BST)'); | ||
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process.env.TZ = 'Etc/UTC'; | ||
assert.strictEqual(date.toString(), 'Sat Apr 14 2018 12:34:56 GMT+0000 (UTC)'); |