LayoutTests/inspector/event-listener.html

   1 <!doctype html>
   2 <html>
   3 <head>
   4 <script type="text/javascript" src="../http/tests/inspector/inspector-test.js"></script>
   5 <script>
   6 function test()
   7 {
   8     const KaboomEvent = "kaboom";
   9     var emitter = new WebInspector.Object();
  10     var context = new WebInspector.Object();
  11     var data = [1, 2, 3];
  12
  13     function kaboomCallback(event) {
  14         InspectorTest.assert(this === context, "Callback invoked with wrong |this| binding.");
  15         InspectorTest.assert(event.target === emitter, "Callback invoked with wrong event emitter.");
  16         InspectorTest.assert(event.data === data, "Callback invoked with wrong event data.");
  17
  18         InspectorTest.log("Invoked callback for kaboom event.");
  19     }
  20
  21     // Test for multiple firings of the listener.
  22
  23     var listener = new WebInspector.EventListener(context);
  24     InspectorTest.assert(!emitter.hasEventListeners(KaboomEvent), "Emitter should not have any listeners.");
  25     emitter.dispatchEventToListeners(KaboomEvent, data); // Should not fire anything.
  26
  27     InspectorTest.log("Connecting the listener.");
  28     listener.connect(emitter, KaboomEvent, kaboomCallback);
  29     InspectorTest.assert(emitter.hasEventListeners(KaboomEvent), "Emitter should have a listener.");
  30     emitter.dispatchEventToListeners(KaboomEvent, data); // Should fire.
  31     emitter.dispatchEventToListeners(KaboomEvent, data); // Should fire.
  32     InspectorTest.log("Disconnecting the listener.");
  33     listener.disconnect();
  34
  35     emitter.dispatchEventToListeners(KaboomEvent, data); // Should not fire anything.
  36     InspectorTest.assert(!emitter.hasEventListeners(KaboomEvent), "Emitter should not have any listeners.");
  37
  38     // Test reconnection.
  39
  40     InspectorTest.log("Connecting the listener.");
  41     listener.connect(emitter, KaboomEvent, kaboomCallback);
  42     emitter.dispatchEventToListeners(KaboomEvent, data); // Should fire.
  43     InspectorTest.log("Disconnecting the listener.");
  44     listener.disconnect();
  45
  46     // Test unused listener.
  47
  48     InspectorTest.log("Connecting the listener.");
  49     listener.connect(emitter, KaboomEvent, kaboomCallback);
  50     InspectorTest.log("Disconnecting the listener.");
  51     listener.disconnect();
  52
  53     // Test for single firing of the listener.
  54
  55     var singleListener = new WebInspector.EventListener(context, true);
  56     InspectorTest.assert(!emitter.hasEventListeners(KaboomEvent), "Emitter should not have any listeners.");
  57     emitter.dispatchEventToListeners(KaboomEvent, data); // Should not fire anything.
  58
  59     InspectorTest.log("Connecting the single-fire listener.");
  60     singleListener.connect(emitter, KaboomEvent, kaboomCallback);
  61     InspectorTest.assert(emitter.hasEventListeners(KaboomEvent), "Emitter should have a listener.");
  62     emitter.dispatchEventToListeners(KaboomEvent, data); // Should fire.
  63     InspectorTest.assert(!emitter.hasEventListeners(KaboomEvent), "Emitter should not have any listeners.");
  64     emitter.dispatchEventToListeners(KaboomEvent, data); // Should not fire.
  65     InspectorTest.log("Disconnecting the single-fire listener.");
  66     singleListener.disconnect(); // Should cause an error.
  67     emitter.dispatchEventToListeners(KaboomEvent, data); // Should not fire.
  68
  69     // Test for various error cases and abuse.
  70
  71     var badListener = new WebInspector.EventListener(context);
  72     badListener.connect(data, data, data); // Should complain about non-callable callback.
  73     badListener.connect(null, KaboomEvent, kaboomCallback); // Should complain about non-callable callback.
  74     badListener.connect(emitter, KaboomEvent, null); // Should complain about non-callable callback.
  75     badListener.connect(emitter, null, kaboomCallback); // Should complain about null event.
  76
  77     var badListener2 = new WebInspector.EventListener(context);
  78     badListener2.disconnect(); // Should complain about already disconnected.
  79     badListener2.connect(emitter, KaboomEvent, kaboomCallback);
  80     badListener2.connect(emitter, KaboomEvent, kaboomCallback); // Should complain about already connected.
  81     emitter.dispatchEventToListeners(KaboomEvent, data); // Should fire.
  82     badListener2.connect(emitter, KaboomEvent, kaboomCallback); // Should complain about already connected.
  83     badListener2.disconnect();
  84     badListener2.disconnect(); // Should complain about already disconnected.
  85
  86     InspectorTest.completeTest();
  87 }
  88 </script>
  89 </head>
  90 <body onload="runTest()">
  91     <p>Testing basic functionality of WebInspector.EventListener.</p>
  92 </body>
  93 </html>