Change event handler test to be more generic

@@ -1185,56 +1185,35 @@ test('disposes the playlist loader', function() {
 test('remove event handlers on dispose', function() {
   var
     player,
-    handlers = [],
-    timeupdateOff = 0,
-    waitingOff = 0,
-    oldOff,
-    type,
-    handler,
-    i;
+    onhandlers = 0,
+    offhandlers = 0,
+    oldOn,
+    oldOff;
 
   player = createPlayer();
-  player.src({
-    src: 'manifest/master.m3u8',
-    type: 'application/vnd.apple.mpegurl'
-  });
-
+  oldOn = player.on;
   oldOff = player.off;
+  player.on = function(type, handler) {
+    onhandlers++;
+    oldOn.call(player, type, handler);
+  };
   player.off = function(type, handler) {
-    handlers.push([type, handler]);
-
-    if (type === 'timeupdate') {
-      timeupdateOff++;
-    } else if (type === 'waiting') {
-      waitingOff++;
-    }
-
+    offhandlers++;
     oldOff.call(player, type, handler);
   };
+  player.src({
+    src: 'manifest/master.m3u8',
+    type: 'application/vnd.apple.mpegurl'
+  });
+  openMediaSource(player);
+  player.hls.playlists.trigger('loadedmetadata');
 
   player.dispose();
 
-  equal(timeupdateOff, 2, 'both fillBuffer and drainBuffer handlers were removed');
-  equal(waitingOff, 1, 'drainBuffer handler was removed');
-
-  for (i = 0; i < handlers.length; i++) {
-    type = handlers[i][0];
-    handler = handlers[i][1];
-
-    if (handler === player.hls.fillBuffer) {
-      equal(type, 'timeupdate', 'fillBuffer\'s timeupdate handler was removed');
-    } else if (handler === player.hls.drainBuffer) {
-      if (type === 'timeupdate') {
-        ok(type, 'drainBuffer\'s timeupdate handler was removed');
-      } else if (type === 'waiting') {
-        ok(type, 'drainBuffer\'s waiting handler was removed');
-      } else {
-        ok(false, 'drainBuffer handler was removed that wasn\'t timeupdate or waiting');
-      }
-    }
-  }
+  equal(offhandlers, onhandlers, 'the amount of on and off handlers is the same');
 
   player.off = oldOff;
+  player.on = oldOn;
 });
 
 test('aborts the source buffer on disposal', function() {