unload.js

var listeners = [],
	$window;

beforeEach(function ( ) {
	
	var fn;

	if(!$window) {
		$window = angular.injector([ 'ng' ]).get('$window');

		fn = $window.addEventListener;

		$window.addEventListener = function ( ) {
			listeners.push({ type: arguments[0], fn: arguments[1] });
			return fn.apply($window, arguments);
		};
	}
});

afterEach(function ( ) {

	var listener;

	while(listeners.length) {
		listener = listeners.shift();
		$window.removeEventListener(listener.type, listener.fn);
	}
	
});