shelljs/test/pipe.js

var shell = require('..');

var assert = require('assert');

shell.config.silent = true;

shell.rm('-rf', 'tmp');
shell.mkdir('tmp');

//
// Invalids
//

// commands like `rm` can't be on the right side of pipes
assert.equal(typeof shell.ls('.').rm, 'undefined');
assert.equal(typeof shell.cat('resources/file1.txt').rm, 'undefined');

//
// Valids
//

// piping to cat() should return roughly the same thing
assert.strictEqual(shell.cat('resources/file1.txt').cat().toString(),
    shell.cat('resources/file1.txt').toString());

// piping ls() into cat() converts to a string
assert.strictEqual(shell.ls('resources/').cat().toString(),
    shell.ls('resources/').stdout);

var result;
result = shell.ls('resources/').grep('file1');
assert.equal(result + '', 'file1\nfile1.js\nfile1.txt\n');

result = shell.ls('resources/').cat().grep('file1');
assert.equal(result + '', 'file1\nfile1.js\nfile1.txt\n');

// Equivalent to a simple grep() test case
result = shell.cat('resources/grep/file').grep(/alpha*beta/);
assert.equal(shell.error(), null);
assert.equal(result.toString(), 'alphaaaaaaabeta\nalphbeta\n');

// Equivalent to a simple sed() test case
var result = shell.cat('resources/grep/file').sed(/l*\.js/, '');
assert.ok(!shell.error());
assert.equal(result.toString(), 'alphaaaaaaabeta\nhowareyou\nalphbeta\nthis line ends in\n\n');

// Synchronous exec
// TODO: add windows tests
if (process.platform !== 'win32') {
  // unix-specific
  if (shell.which('grep').stdout) {
    result = shell.cat('resources/grep/file').exec("grep 'alpha*beta'");
    assert.equal(shell.error(), null);
    assert.equal(result, 'alphaaaaaaabeta\nalphbeta\n');
  } else {
    console.error('Warning: Cannot verify piped exec');
  }
} else {
  console.error('Warning: Cannot verify piped exec');
}

// Async exec
// TODO: add windows tests
if (process.platform !== 'win32') {
  // unix-specific
  if (shell.which('grep').stdout) {
    shell.cat('resources/grep/file').exec("grep 'alpha*beta'", function(code, stdout) {
      assert.equal(code, 0);
      assert.equal(stdout, 'alphaaaaaaabeta\nalphbeta\n');
      shell.exit(123);
    });
  } else {
    console.error('Warning: Cannot verify piped exec');
  }
} else {
  console.error('Warning: Cannot verify piped exec');
  shell.exit(123);
}