Binding in prototype

sync_test.js

testBoth("bindings should do the right thing when binding is in prototype", function(get, set) {
  var obj, proto, a, b, selectionChanged;
  Ember.run(function() {
    obj = {
      selection: null
    };

    selectionChanged = 0;

    Ember.addObserver(obj, 'selection', function () {
      selectionChanged++;
    });

    proto = {
      obj: obj,
      changeSelection: function (value) {
        set(this, 'selection', value);
      }
    };
    Em.bind(proto, 'selection', 'obj.selection');

    a = Em.create(proto);
    b = Em.create(proto);
  });

  Em.run(function () {
    set(a, 'selection', 'a');
  });

  Em.run(function () {
    set(b, 'selection', 'b');
  });

  Em.run(function () {
    set(a, 'selection', 'a');
  });

  equal(selectionChanged, 3);
  equal(get(obj, 'selection'), 'a');
});