define(["Filer", "util"], function(Filer, util) {

  /**
   * NOTE: unlike node.js, which either doesn't give filenames (e.g., in case of
   * fd vs. path) for events, or gives only a portion thereof (e.g., basname),
   * we give full, abs paths always.
   */

  var filenameOne = '/watch.txt';
  var filenameTwo = '/hasOwnProperty';

  describe("node.js tests: https://github.com/joyent/node/blob/master/test/simple/test-fs-watch.js", function() {

    beforeEach(util.setup);
    afterEach(util.cleanup);

    it('should get change event for writeFile() using FSWatcher object', function(done) {
      var fs = util.fs();
      var changes = 0;

      var watcher = fs.watch(filenameOne);
      watcher.on('change', function(event, filename) {
        expect(event).to.equal('change');
        expect(filename).to.equal(filenameOne);

        // Make sure only one change event comes in (i.e., close() works)
        changes++;
        watcher.close();

        fs.writeFile(filenameOne, 'hello again', function(error) {
          expect(changes).to.equal(1);
          done();
        });
      });

      fs.writeFile(filenameOne, 'hello');
    });

    it('should get change event for writeFile() using fs.watch() only', function(done) {
      var fs = util.fs();
      var changes = 0;

      var watcher = fs.watch(filenameTwo, function(event, filename) {
        expect(event).to.equal('change');
        expect(filename).to.equal(filenameTwo);

        watcher.close();
        done();
      });

      fs.writeFile(filenameTwo, 'pardner');
    });

    it('should allow watches on dirs', function(done) {
      var fs = util.fs();
      fs.mkdir('/tmp', function(error) {
        if(error) throw error;

        var watcher = fs.watch('/tmp', function(event, filename) {
// TODO: node thinks this should be 'rename', need to add rename along with change.
          expect(event).to.equal('change');
          expect(filename).to.equal('/tmp');
          watcher.close();
          done();
        });

        fs.open('/tmp/newfile.txt', 'w', function(error, fd) {
          if(error) throw error;
          fs.close(fd);
        });
      });
    });
  });
});