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'use strict';
require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs').promises;
const tmpdir = require('../common/tmpdir');
const expected = 'ümlaut. Лорем 運務ホソモ指及 आपको करने विकास 紙読決多密所 أضف';
let cnt = 0;
function getFileName() {
return path.join(tmpdir.path, `writev_promises_${++cnt}.txt`);
}
tmpdir.refresh();
(async () => {
{
const filename = getFileName();
const handle = await fs.open(filename, 'w');
const buffer = Buffer.from(expected);
const bufferArr = [buffer, buffer];
const expectedLength = bufferArr.length * buffer.byteLength;
let { bytesWritten, buffers } = await handle.writev([Buffer.from('')],
null);
assert.deepStrictEqual(bytesWritten, 0);
assert.deepStrictEqual(buffers, [Buffer.from('')]);
({ bytesWritten, buffers } = await handle.writev(bufferArr, null));
assert.deepStrictEqual(bytesWritten, expectedLength);
assert.deepStrictEqual(buffers, bufferArr);
assert(Buffer.concat(bufferArr).equals(await fs.readFile(filename)));
handle.close();
}
// fs.promises.writev() with an array of buffers without position.
{
const filename = getFileName();
const handle = await fs.open(filename, 'w');
const buffer = Buffer.from(expected);
const bufferArr = [buffer, buffer, buffer];
const expectedLength = bufferArr.length * buffer.byteLength;
let { bytesWritten, buffers } = await handle.writev([Buffer.from('')]);
assert.deepStrictEqual(bytesWritten, 0);
assert.deepStrictEqual(buffers, [Buffer.from('')]);
({ bytesWritten, buffers } = await handle.writev(bufferArr));
assert.deepStrictEqual(bytesWritten, expectedLength);
assert.deepStrictEqual(buffers, bufferArr);
assert(Buffer.concat(bufferArr).equals(await fs.readFile(filename)));
handle.close();
}
})();