xref: /third_party/node/test/parallel/test-child-process-stdin.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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'use strict';
const {
  mustCall,
  mustCallAtLeast,
  mustNotCall,
} = require('../common');
const assert = require('assert');
const debug = require('util').debuglog('test');
const spawn = require('child_process').spawn;

const cat = spawn('cat');
cat.stdin.write('hello');
cat.stdin.write(' ');
cat.stdin.write('world');

assert.strictEqual(cat.stdin.writable, true);
assert.strictEqual(cat.stdin.readable, false);

cat.stdin.end();

let response = '';

cat.stdout.setEncoding('utf8');
cat.stdout.on('data', mustCallAtLeast((chunk) => {
  debug(`stdout: ${chunk}`);
  response += chunk;
}));

cat.stdout.on('end', mustCall());

cat.stderr.on('data', mustNotCall());

cat.stderr.on('end', mustCall());

cat.on('exit', mustCall((status) => {
  assert.strictEqual(status, 0);
}));

cat.on('close', mustCall(() => {
  assert.strictEqual(response, 'hello world');
}));