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0b5191f15d
Add support for fs.write(fd, buffer, cb) and fs.write(fd, buffer, offset, cb) as documented at https://nodejs.org/api/fs.html#fs_fs_write_fd_data_position_encoding_callback and equivalently for fs.writeSync Update docs and code comments to reflect the implementation. PR-URL: https://github.com/nodejs/node/pull/7856 Reviewed-By: Sam Roberts <vieuxtech@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net> Reviewed-By: Yorkie Liu <yorkiefixer@gmail.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
57 lines
1.3 KiB
JavaScript
57 lines
1.3 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const path = require('path');
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const fs = require('fs');
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const filename = path.join(common.tmpDir, 'write.txt');
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common.refreshTmpDir();
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// fs.writeSync with all parameters provided:
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{
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const fd = fs.openSync(filename, 'w');
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let written = fs.writeSync(fd, '');
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assert.strictEqual(0, written);
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fs.writeSync(fd, 'foo');
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written = fs.writeSync(fd, Buffer.from('bár'), 0, Buffer.byteLength('bár'));
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assert.ok(written > 3);
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fs.closeSync(fd);
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assert.strictEqual(fs.readFileSync(filename, 'utf-8'), 'foobár');
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}
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// fs.writeSync with a buffer, without the length parameter:
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{
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const fd = fs.openSync(filename, 'w');
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let written = fs.writeSync(fd, '');
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assert.strictEqual(0, written);
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fs.writeSync(fd, 'foo');
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written = fs.writeSync(fd, Buffer.from('bár'), 0);
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assert.ok(written > 3);
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fs.closeSync(fd);
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assert.strictEqual(fs.readFileSync(filename, 'utf-8'), 'foobár');
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}
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// fs.writeSync with a buffer, without the offset and length parameters:
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{
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const fd = fs.openSync(filename, 'w');
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let written = fs.writeSync(fd, '');
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assert.strictEqual(0, written);
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fs.writeSync(fd, 'foo');
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written = fs.writeSync(fd, Buffer.from('bár'));
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assert.ok(written > 3);
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fs.closeSync(fd);
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assert.strictEqual(fs.readFileSync(filename, 'utf-8'), 'foobár');
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}
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