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74e0ca3f49
PR-URL: https://github.com/nodejs/node/pull/49125 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
27 lines
716 B
JavaScript
27 lines
716 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const { open, readFile } = require('fs').promises;
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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async function validateTruncate() {
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const text = 'Hello world';
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const filename = tmpdir.resolve('truncate-file.txt');
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const fileHandle = await open(filename, 'w+');
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const buffer = Buffer.from(text, 'utf8');
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await fileHandle.write(buffer, 0, buffer.length);
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assert.strictEqual((await readFile(filename)).toString(), text);
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await fileHandle.truncate(5);
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assert.strictEqual((await readFile(filename)).toString(), 'Hello');
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await fileHandle.close();
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}
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validateTruncate().then(common.mustCall());
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