foo.js

  var view = SC.View.create(SC.Gesturable, {
    pinchStart: function(evt) {
      
    },      
    pinchChange: function(evt) {

    },      
    pinchEnd: function(evt) {

    }
  });

  var gestures = get(view, 'gestures'); 
  
  ok(gestures,'Should have a gestures property');
  equals(gestures.length,1,'Should have one gesture');
  ok(gestures[0] instanceof SC.PinchGestureRecognizer,'gesture should be pinch');