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nodejs/test/parallel/test-fs-readfilesync-pipe-large.js
Jackson Tian 58dc229d9a
test: use repeat() instead of new Array().join()
The usage of `new Array(length + 1).join(str)` is strange.
Change to `str.repeat(length)` is more clearly.

PR-URL: https://github.com/nodejs/node/pull/11071
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
2017-02-01 20:06:04 -08:00

39 lines
1.1 KiB
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
// simulate `cat readfile.js | node readfile.js`
if (common.isWindows || common.isAix) {
common.skip(`No /dev/stdin on ${process.platform}.`);
return;
}
const fs = require('fs');
if (process.argv[2] === 'child') {
process.stdout.write(fs.readFileSync('/dev/stdin', 'utf8'));
return;
}
const filename = path.join(common.tmpDir, '/readfilesync_pipe_large_test.txt');
const dataExpected = 'a'.repeat(999999);
common.refreshTmpDir();
fs.writeFileSync(filename, dataExpected);
const exec = require('child_process').exec;
const f = JSON.stringify(__filename);
const node = JSON.stringify(process.execPath);
const cmd = `cat ${filename} | ${node} ${f} child`;
exec(cmd, { maxBuffer: 1000000 }, function(err, stdout, stderr) {
assert.ifError(err);
assert.strictEqual(stdout, dataExpected, 'it reads the file and outputs it');
assert.strictEqual(stderr, '', 'it does not write to stderr');
console.log('ok');
});
process.on('exit', function() {
fs.unlinkSync(filename);
});