wp8/bin/node_modules/shelljs/test/make.js

var shell = require('..'),
    child = require('child_process'),
    assert = require('assert');

shell.mkdir('-p', 'tmp');
var file = 'tmp/tempscript'+Math.random()+'.js',
    script = 'require(\'../../make.js\');' +
             'target.all=function(){' +
             '  echo("first"); '+
             '  cp("this_file_doesnt_exist", ".");' +
             '  echo("second");' +
             '}';

script.to(file);
child.exec('node '+file, function(err, stdout, stderr) {
  assert.ok(stdout.match('first'));
  assert.ok(!stdout.match('second')); // Make should die on errors, so this should never get echoed

  shell.exit(123);
});