node/test/parallel/test-fs-readfile-pipe.js
Teddy Katz 3adda4b2ad
tools,test: enforce assert.ifError with lint rule
This adds an ESLint rule to enforce the use of `assert.ifError(err)`
instead of `if (err) throw err;` in tests.

PR-URL: https://github.com/nodejs/node/pull/10671
Ref: https://github.com/nodejs/node/pull/10543
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Michal Zasso <targos@protonmail.com>
2017-01-30 12:08:37 -05:00

33 lines
899 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
// 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');
const dataExpected = fs.readFileSync(__filename, 'utf8');
if (process.argv[2] === 'child') {
fs.readFile('/dev/stdin', function(er, data) {
assert.ifError(er);
process.stdout.write(data);
});
return;
}
const exec = require('child_process').exec;
const f = JSON.stringify(__filename);
const node = JSON.stringify(process.execPath);
const cmd = `cat ${f} | ${node} ${f} child`;
exec(cmd, 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');
});