bricks-cli/node_modules/broccoli-sane-watcher/tests/index.js

Command line tool for developing ambitious ember.js apps

var fs = require('fs');
var broccoli = require('broccoli');
var rimraf = require('rimraf');
var assert = require("assert");
var Watcher = require('..');
var TestFilter = require('./test_filter');
var Promise = require('rsvp').Promise;


describe('broccoli-sane-watcher', function (done) {
  var watcher;

  beforeEach(function () {
    fs.mkdirSync('tests/fixtures');
  });

  afterEach(function (done) {
    if (watcher) {
      watcher.close();
      watcher = null;
    }
    rimraf('tests/fixtures', done);
  });

  it('should pass poll option to sane', function (done) {
    fs.mkdirSync('tests/fixtures/a');
    var filter = new TestFilter(['tests/fixtures/a'], function () {
      return 'output';
    });
    var builder = new broccoli.Builder(filter);
    watcher = new Watcher(builder, { poll: true });
    watcher.sequence.then(function () {
      assert.ok(watcher.watched['tests/fixtures/a'].polling);
      done();
    });
  });

  it('should emit change event when file is added', function (done) {
    fs.mkdirSync('tests/fixtures/a');
    var changes = 0;
    var filter = new TestFilter(['tests/fixtures/a'], function () {
      return 'output';
    });
    var builder = new broccoli.Builder(filter);
    watcher = new Watcher(builder);
    watcher.on('change', function (results) {
      assert.equal(results.directory, 'output');
      if (changes++) {
        done();
      } else {
        fs.writeFileSync('tests/fixtures/a/file.js');
      }
    });

    watcher.on('error', function (error) {
      assert.ok(false, error.message);
      done();
    });
  });

  it('should emit an error when a filter errors', function (done) {
    fs.mkdirSync('tests/fixtures/a');
    var filter = new TestFilter(['tests/fixtures/a'], function () {
      throw new Error('filter error');
    });
    var count = 0;
    var builder = new broccoli.Builder(filter);
    watcher = new Watcher(builder);
    watcher.on('change', function (results) {
      count++;
      assert.equal(count, 2, "only the second build should be here");
      assert.equal(results.directory, 'output');
      done();
    });
    watcher.on('error', function (error) {
      count++;
      assert.equal(count, 1, "only the first build should be here");
      if (count !== 1) done();
      // next result shouldn't fail
      filter.output = function () {
        return 'output';
      };
      // trigger next build
      fs.writeFileSync('tests/fixtures/a/file.js');
    });
  });

  it('should emit a pleasant error when attempting to watch a missing directory', function () {
    var builder = new broccoli.Builder('test/fixtures/b');
    var watcher = new Watcher(builder)
    return watcher.sequence
      .catch(function(error) {
        var message = error.message;

        assert.equal(message, 'Attempting to watch missing directory: test/fixtures/b');
      })
  });
});