'use strict';

const cp = require('child_process');

const common = require('../common');

const assert = require('assert');

// Windows' `echo` command is a built-in shell command and not an external

// executable like on *nix

const opts = { shell: common.isWindows };

const p = cp.spawn('echo', [], opts);

p.on('close', common.mustCall(function(code, signal) {

assert.strictEqual(code, 0);

assert.strictEqual(signal, null);

spawnWithReadable();

}));

p.stdout.read();

function spawnWithReadable() {

const buffer = [];

const p = cp.spawn('echo', ['123'], opts);

p.on('close', common.mustCall(function(code, signal) {

assert.strictEqual(code, 0);

assert.strictEqual(signal, null);

assert.strictEqual(Buffer.concat(buffer).toString().trim(), '123');

}));

p.stdout.on('readable', function() {

let buf;

while (buf = this.read())

buffer.push(buf);

});

}