shelljs/test/exec.js

var shell = require('..');

var assert = require('assert'),
    path = require('path'),
    fs = require('fs'),
    child = require('child_process');

shell.silent(true);

function numLines(str) {
  return typeof str === 'string' ? str.match(/\n/g).length : 0;
}

//
// Invalids
//

shell.exec();
assert.ok(shell.error());

var result = shell.exec('asdfasdf'); // could not find command
assert.ok(result.code > 0);


//
// Valids
//

//
// sync
//

// check if stdout goes to output
var result = shell.exec('node -e \"console.log(1234);\"');
assert.equal(shell.error(), null);
assert.equal(result.code, 0);
assert.ok(result.output === '1234\n' || result.output === '1234\nundefined\n'); // 'undefined' for v0.4

// check if stderr goes to output
var result = shell.exec('node -e \"console.error(1234);\"');
assert.equal(shell.error(), null);
assert.equal(result.code, 0);
assert.ok(result.output === '1234\n' || result.output === '1234\nundefined\n'); // 'undefined' for v0.4

// check if stdout + stderr go to output
var result = shell.exec('node -e \"console.error(1234); console.log(666);\"');
assert.equal(shell.error(), null);
assert.equal(result.code, 0);
assert.ok(result.output === '1234\n666\n' || result.output === '1234\n666\nundefined\n');  // 'undefined' for v0.4

// check exit code
var result = shell.exec('node -e \"process.exit(12);\"');
assert.equal(shell.error(), null);
assert.equal(result.code, 12);

// interaction with cd
shell.cd('resources/external');
var result = shell.exec('node node_script.js');
assert.equal(shell.error(), null);
assert.equal(result.code, 0);
assert.equal(result.output, 'node_script_1234\n');
shell.cd('../..');

//
// async
//

var asyncFlags = [];

//
// callback as 2nd argument
//
asyncFlags[0] = false;
shell.exec('node -e \"console.log(5678);\"', {async:true}, function(code, output) {
  assert.equal(code, 0);
  assert.ok(output === '5678\n' || output === '5678\nundefined\n');  // 'undefined' for v0.4
  asyncFlags[0] = true;


  // Most of the following code doesn't really belong here since it tests the sync version.
  // However there seems to be a race condition with the stdout returned by child.exec()
  // that makes the tests fail intermittently. So we're keeping them here in a chain
  // to avoid this race issue


  //
  // check if stdout is proxied with default silent options (i.e. silent = false)
  //
  asyncFlags[1] = false;
  shell.mkdir('-p', 'tmp');
  var file = 'tmp/tempscript'+Math.random()+'.js',
      script = 'require(\'../../global.js\'); exec(\'node -e \"console.log(555);\"\')';
  script.to(file);
  child.exec('node '+file, function(err, stdout, stderr) {
    assert.ok(stdout === '555\n' || stdout === '555\nundefined\n'); // 'undefined' for v0.4
    asyncFlags[1] = true;

    //
    // check if stdout is proxied when: silent(true), {silent:false}
    //
    asyncFlags[2] = false;
    shell.mkdir('-p', 'tmp');
    var file = 'tmp/tempscript'+Math.random()+'.js',
        script = 'require(\'../../global.js\'); silent(true); exec(\'node -e \"console.log(333);\"\', {silent:false})';
    script.to(file);
    child.exec('node '+file, function(err, stdout, stderr) {
      assert.ok(stdout === '333\n' || stdout === '333\nundefined\n'); // 'undefined' for v0.4
      asyncFlags[2] = true;
  
      //
      // check if stdout is proxied when: silent(true), {silent:false} - async
      //
      asyncFlags[3] = false;
      shell.mkdir('-p', 'tmp');
      var file = 'tmp/tempscript'+Math.random()+'.js',
          script = 'require(\'../../global.js\'); silent(true); exec(\'node -e \"console.log(222);\"\', {silent:false, async:true})';
      script.to(file);
      child.exec('node '+file, function(err, stdout, stderr) {
        assert.ok(stdout === '222\n' || stdout === '222\nundefined\n'); // 'undefined' for v0.4
        asyncFlags[3] = true;
      });
    });
  });
});
assert.equal(shell.error(), null);

// no callback (no need for asyncFlags)
shell.exec('node -e \"console.log(1234)\"', {async:true});
assert.equal(shell.error(), null);

setTimeout(function() {
  asyncFlags.forEach(function(flag) {
    assert.equal(flag, true);
  });

  shell.exit(123);  
}, 2000);