[REF] initial prototype of owl 2

tests/mocks/mockEventTarget.js

@@ -0,0 +1,42 @@
+// mockEventTarget.js
+
+// copy the code from https://developer.mozilla.org/en-US/docs/Web/API/EventTarget#Simple_implementation_of_EventTarget
+var EventTarget = function() {
+    this.listeners = {};
+  };
+  
+  EventTarget.prototype.listeners = null;
+  EventTarget.prototype.addEventListener = function(type, callback) {
+    if (!(type in this.listeners)) {
+      this.listeners[type] = [];
+    }
+    this.listeners[type].push(callback);
+  };
+  
+  EventTarget.prototype.removeEventListener = function(type, callback) {
+    if (!(type in this.listeners)) {
+      return;
+    }
+    var stack = this.listeners[type];
+    for (var i = 0, l = stack.length; i < l; i++) {
+      if (stack[i] === callback){
+        stack.splice(i, 1);
+        return;
+      }
+    }
+  };
+  
+  EventTarget.prototype.dispatchEvent = function(event) {
+    if (!(event.type in this.listeners)) {
+      return true;
+    }
+    var stack = this.listeners[event.type].slice();
+  
+    for (var i = 0, l = stack.length; i < l; i++) {
+      stack[i].call(this, event);
+    }
+    return !event.defaultPrevented;
+  };
+  
+  // make the EventTarget global
+  global.EventTarget = EventTarget