nodejs-mozilla/test/parallel/test-child-process-ipc.js

64 lines
2.0 KiB
JavaScript

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// 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.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const {
mustCall,
mustNotCall,
} = require('../common');
const assert = require('assert');
const debug = require('util').debuglog('test');
const { spawn } = require('child_process');
const fixtures = require('../common/fixtures');
const sub = fixtures.path('echo.js');
const child = spawn(process.argv[0], [sub]);
child.stderr.on('data', mustNotCall());
child.stdout.setEncoding('utf8');
const messages = [
'hello world\r\n',
'echo me\r\n',
];
child.stdout.on('data', mustCall((data) => {
debug(`child said: ${JSON.stringify(data)}`);
const test = messages.shift();
debug(`testing for '${test}'`);
assert.strictEqual(data, test);
if (messages.length) {
debug(`writing '${messages[0]}'`);
child.stdin.write(messages[0]);
} else {
assert.strictEqual(messages.length, 0);
child.stdin.end();
}
}, messages.length));
child.stdout.on('end', mustCall((data) => {
debug('child end');
}));