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f593f9e9ef
Enforce `//` for multiline comments. Some tests mixed and matched, and at least one did so in a (to me) surprising way. PR-URL: https://github.com/nodejs/node/pull/35485 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
'use strict';
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// This test makes sure that `writeFile()` always writes from the current
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// position of the file, instead of truncating the file, when used with file
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// descriptors.
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const common = require('../common');
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const assert = require('assert');
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const fs = require('fs');
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const join = require('path').join;
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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{
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/* writeFileSync() test. */
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const filename = join(tmpdir.path, 'test.txt');
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/* Open the file descriptor. */
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const fd = fs.openSync(filename, 'w');
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/* Write only five characters, so that the position moves to five. */
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assert.deepStrictEqual(fs.writeSync(fd, 'Hello'), 5);
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assert.deepStrictEqual(fs.readFileSync(filename).toString(), 'Hello');
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/* Write some more with writeFileSync(). */
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fs.writeFileSync(fd, 'World');
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/* New content should be written at position five, instead of zero. */
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assert.deepStrictEqual(fs.readFileSync(filename).toString(), 'HelloWorld');
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/* Close the file descriptor. */
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fs.closeSync(fd);
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}
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{
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/* writeFile() test. */
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const file = join(tmpdir.path, 'test1.txt');
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/* Open the file descriptor. */
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fs.open(file, 'w', common.mustCall((err, fd) => {
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assert.ifError(err);
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/* Write only five characters, so that the position moves to five. */
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fs.write(fd, 'Hello', common.mustCall((err, bytes) => {
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assert.ifError(err);
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assert.strictEqual(bytes, 5);
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assert.deepStrictEqual(fs.readFileSync(file).toString(), 'Hello');
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/* Write some more with writeFile(). */
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fs.writeFile(fd, 'World', common.mustCall((err) => {
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assert.ifError(err);
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/* New content should be written at position five, instead of zero. */
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assert.deepStrictEqual(fs.readFileSync(file).toString(), 'HelloWorld');
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/* Close the file descriptor. */
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fs.closeSync(fd);
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}));
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}));
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}));
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}
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