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openlayers/tests/Events.html

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<html>
<head>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
var isMozilla = (navigator.userAgent.indexOf("compatible") == -1);
var map;
var a;
function test_Events_constructor (t) {
var mapDiv = OpenLayers.Util.getElement('map');
var obj = {result: 0};
var eventTypes = ["doThingA", "doThingB", "doThingC"];
var browserTypes = OpenLayers.Events.prototype.BROWSER_EVENTS;
var totalTests = 4 + 2*eventTypes.length + 2*browserTypes.length;
t.plan( totalTests );
events = new OpenLayers.Events(obj, mapDiv, eventTypes);
t.ok( events instanceof OpenLayers.Events, "new OpenLayers.Control returns object" );
t.ok(events.object ==obj, " 'object' property correctly set");
t.ok(events.element == mapDiv, " 'element' property correctly set");
for (var i = 0; i < browserTypes.length; i++) {
var type = browserTypes[i];
t.ok( events.listeners[type] instanceof Array, "browser event: " + type + " correctly registered" );
t.ok( OpenLayers.Util.indexOf(events.eventTypes, type) != -1, "browser type " + type + "' correctly added to eventTypes array");
}
for (var i = 0; i < eventTypes.length; i++) {
var type = eventTypes[i];
t.ok( events.listeners[type] instanceof Array, "custom event: " + type + " correctly registered");
t.ok( OpenLayers.Util.indexOf(events.eventTypes, type) != -1, "eventType " + type + "' correctly added to eventTypes array");
}
// default/nulls
events = new OpenLayers.Events(null, null, null);
t.ok( events.listeners != null,
"init of Events with null object/element/eventTypes still creates listeners array" );
}
function test_Events_register(t){
t.plan(4);
var ev = {
'object': {},
'listeners': {
'listenerA': {
'push': function(options){
gObjA = options.obj;
gFuncA = options.func;
}
},
'listenerB': {
'push': function(options){
gObjB = options.obj;
gFuncB = options.func;
}
}
},
'eventTypes': ['listenerA', 'listenerB']
};
var type = null;
var object = null;
var func = null;
//func null
gObjA = null; gFuncA = null; gObjB = null; gFuncB = null;
OpenLayers.Events.prototype.register.apply(ev, [type, object, func]);
t.ok((gObjA == null) && (gFuncA == null) &&
(gObjB == null) && (gFuncB == null), "no push called func null");
//valid func, type not in ev.eventTypes
func = function() {};
gObjA = null; gFuncA = null; gObjB = null; gFuncB = null;
OpenLayers.Events.prototype.register.apply(ev, [type, object, func]);
t.ok((gObjA == null) && (gFuncA == null) &&
(gObjB == null) && (gFuncB == null), "no push called func null");
//valid func, type in ev.eventTypes, null obj
type = 'listenerA';
gObjA = null; gFuncA = null; gObjB = null; gFuncB = null;
OpenLayers.Events.prototype.register.apply(ev, [type, object, func]);
t.ok((gObjA == ev.object) && (gFuncA == func) &&
(gObjB == null) && (gFuncB == null), "push called on listenerA's mock array when type passed in 'listenerA'. events.object taken since obj is null.");
//valid func, type in ev.eventTypes, valid obj
type = 'listenerB';
object = {};
gObjA = null; gFuncA = null; gObjB = null; gFuncB = null;
OpenLayers.Events.prototype.register.apply(ev, [type, object, func]);
t.ok((gObjA == null) && (gFuncA == null) &&
(gObjB == object) && (gFuncB == func), "push called on listenerB's mock array when type passed in 'listenerB'.");
}
function test_Events_register_unregister(t) {
t.plan( 18 );
var mapDiv = OpenLayers.Util.getElement('map');
var obj = {result: 0};
var eventTypes = ["doThingA", "doThingB", "doThingC"];
events = new OpenLayers.Events(obj, mapDiv, eventTypes);
var func = function () { this.result++ }
events.register( "doThingA", obj, func );
var listenerList = events.listeners["doThingA"];
t.eq( listenerList.length, 1, "register correctly adds to event.listeners" );
t.ok( listenerList[0].obj == obj, "obj property correctly registered");
t.ok( listenerList[0].func == func, "func property correctly registered");
var func2 = function () { this.result-- }
events.register( "doThingA", obj, func2 );
var listenerList = events.listeners["doThingA"];
t.eq( listenerList.length, 2, "register correctly appends new callback to event.listeners[doThingA]" );
t.ok( listenerList[1].obj == obj, "obj property correctly registered");
t.ok( listenerList[1].func == func2, "func property correctly registered");
var func3 = function () { this.result = this.result + 3; }
events.register( "doThingA", null, func3 );
var listenerList = events.listeners["doThingA"];
t.eq( listenerList.length, 3, "register correctly appends new callback to event.listeners[doThingA] even when obj passed in is null" );
t.ok( listenerList[2].obj == obj, "obj is correctly set to Events.object default when null is passed in.");
t.ok( listenerList[2].func == func3, "func property correctly registered");
events.register( "doThingA", obj, null);
var listenerList = events.listeners["doThingA"];
t.eq( listenerList.length, 3, "register correctly does not append null callback to event.listeners[doThingA] even when obj passed in is null" );
events.register( "chicken", obj, func);
t.ok( events.listeners["chicken"] == null, "register() does nothing on attempt to register un-enabled event");
events.unregister("doThingA", obj, null);
var listenerList = events.listeners["doThingA"];
t.eq( listenerList.length, 3, "trying to unregister a null callback does nothing -- but doesnt crash :-)" );
events.unregister("doThingA", obj, func);
var found = false;
for (var i = 0; i < listenerList.length; i++) {
var listener = listenerList[i];
if (listener.obj == obj && listener.func == func) {
found = true;
}
}
t.ok( (listenerList.length == 2) && !found, "unregister correctly removes callback" );
events.unregister("doThingA", null, func3);
var found = false;
for (var i = 0; i < listenerList.length; i++) {
var listener = listenerList[i];
if (listener.obj == obj && listener.func == func) {
found = true;
}
}
t.ok( (listenerList.length == 1) && !found, "unregister correctly removes callback when no obj specified" );
var func4 = function () { this.result = "chicken"; }
events.unregister("doThingA", obj, func4);
t.ok( (listenerList.length == 1), "unregister does not bomb if you try to remove an unregistered callback" );
var obj2 = { chicken: 151 };
events.unregister("doThingA", obj2, func2);
t.ok( (listenerList.length == 1), "unregister does not bomb or accidntally remove if you try to remove a valid callback on a valid event type, but with the wrong context object" );
events.unregister("doThingA", obj, null);
t.ok( (listenerList.length == 1), "unregister does not bomb if you try to remove a null callback" );
events.unregister("chicken", null, func3);
t.ok( events.listeners["chicken"] == null, "unregistering an event that is not enabled does not wierdly enable it -- or cause a script error")
}
function test_Events_remove(t) {
t.plan( 2 );
var mapDiv = OpenLayers.Util.getElement('map');
var obj = {result: 0};
var eventTypes = ["doThingA", "doThingB", "doThingC"];
events = new OpenLayers.Events(obj, mapDiv, eventTypes);
var func = function () { this.result++ }
var func2 = function () { this.result-- }
var func3 = function () { this.result = this.result + 3; }
events.register( "doThingA", obj, func );
events.register( "doThingA", obj, func2 );
events.register( "doThingA", null, func3 );
events.remove("doThingA");
t.eq( events.listeners["doThingA"].length, 0, "remove() correctly clears the event listeners" );
events.remove("chicken");
t.ok( events.listeners["chicken"] == null, "remove on non-enabled event does not break or accidentally enable the event");
}
function test_Events_triggerEvent(t) {
t.plan(13);
var mapDiv = OpenLayers.Util.getElement('map');
var obj = {result: 0};
var eventTypes = ["doThingA", "doThingB", "doThingC"];
events = new OpenLayers.Events(obj, mapDiv, eventTypes);
var func = function () { this.result++ }
events.register( "doThingA", obj, func );
events.triggerEvent("doThingA", {});
t.eq( obj.result, 1, "result is 1 after we call triggerEvent" );
events.triggerEvent("doThingA");
t.eq( obj.result, 2, "result is 2 after we call triggerEvent with no event" );
var funcB = function() { this.FUNK = "B"; return false; }
events.register( "doThingA", obj, funcB);
events.triggerEvent("doThingA");
t.ok ((obj.result == 3) && (obj.FUNK == "B"), "executing multiple callbacks works")
var funcZ = function() { this.FUNK = "Z"; }
events.register( "doThingA", obj, funcZ);
events.triggerEvent("doThingA");
t.ok ((obj.result == 4) && (obj.FUNK == "B"), "executing multiple callbacks works, and when one returns false, it stops chain correctly")
var func2 = function() { this.result = this.result + 10; }
events.register( "doThingB", null, func2);
events.triggerEvent("doThingB");
t.eq( obj.result, 14, "passing a null object default gets set correctly");
//no specific t.ok for this one, but if it breaks, you will know it.
events.triggerEvent("chicken");
events = new OpenLayers.Events(null, mapDiv, eventTypes);
// a is global variable (context-irrelevant)
a = 0;
var func = function () { a = 5; }
events.register( "doThingC", null, func );
events.triggerEvent("doThingC");
t.eq(a, 5, "if Events has no object set and an event is registered also with no object, triggerEvent() calls it without trying to set the context to null");
// trigger events with additional arguments
eventTypes = ["something"];
events = new OpenLayers.Events(null, null, eventTypes);
var instance = {id: Math.random()};
var listener = function(obj) {
t.eq(this.id, instance.id,
"listener called with proper scope");
t.eq(arguments.length, 1,
"listener called with a single argument");
t.eq(typeof arguments, "object",
"listener called with an object");
t.eq(obj.foo, evt.foo,
"foo property set on the layer");
};
events.register("something", instance, listener);
var evt = {
id: Math.random(),
"foo": "bar"
};
events.triggerEvent("something", evt);
events.unregister("something", instance, listener);
// test return from triggerEvent
var listener1 = function() {
return "foo";
}
var listener2 = function() {
return false;
}
var listener3 = function() {
t.fail("never call me again!");
}
events.register("something", instance, listener1);
var ret = events.triggerEvent("something", evt);
t.eq(ret, "foo", "correct return from single listener");
events.register("something", instance, listener2);
ret = events.triggerEvent("something", evt);
t.eq(ret, false, "correct return for two listeners");
events.register("something", instance, listener3);
ret = events.triggerEvent("something", evt);
t.eq(ret, false, "correct return for three listeners where second cancels");
events.unregister("something", instance, listener1);
events.unregister("something", instance, listener2);
events.unregister("something", instance, listener3);
}
function test_Events_destroy (t) {
t.plan(2);
var div = OpenLayers.Util.getElement('test');
var obj = {};
var events = new OpenLayers.Events(obj, div);
// +1 because of blocking dragstart in attachToElement()
t.eq(OpenLayers.Event.observers[div._eventCacheID].length,
OpenLayers.Events.prototype.BROWSER_EVENTS.length + 1,
"construction creates new arrayin hash, registers appropriate events");
events.destroy();
events = null;
t.eq(OpenLayers.Event.observers["test"], null,
"destruction removes the event observer from hash");
}
function test_Event(t) {
t.plan(24);
var div = OpenLayers.Util.getElement('test');
var name = "mouseover";
var func = function() {};
//1st elem 1st listener
OpenLayers.Event.observe(div, name, func);
var cacheID = div._eventCacheID;
t.ok(cacheID, "element given new cache id");
var elementObservers = OpenLayers.Event.observers[cacheID];
t.ok(elementObservers, "new cache bucket made for event");
t.eq(elementObservers.length, 1, "one listener registered");
var listener = elementObservers[0];
t.ok(listener.element == div, "element registered");
t.eq(listener.name, name, "name registered");
t.ok(listener.observer == func, "function registered");
t.eq(listener.useCapture, false, "useCapture defaults to false");
//1st elem 2nd listener
name = "mouseout";
var newFunc = function() {};
OpenLayers.Event.observe(div, name, newFunc, true);
var newCacheID = div._eventCacheID;
t.eq(newCacheID, cacheID, "element's cache id not overridden");
t.eq(elementObservers.length, 2, "listener added to existing bucket");
var listener = elementObservers[1];
t.ok(listener.element == div, "element registered");
t.eq(listener.name, name, "name registered");
t.ok(listener.observer == newFunc, "function registered");
t.eq(listener.useCapture, true, "useCapture correctly registered");
//2st elem 1st listener
div = OpenLayers.Util.getElement('test2');
OpenLayers.Event.observe(div, name, func);
var cacheID = div._eventCacheID;
t.ok(cacheID, "new element given new cache id");
t.ok(cacheID != newCacheID, "new cache id is unique");
elementObservers = OpenLayers.Event.observers[cacheID];
t.ok(elementObservers, "new cache bucket made for event");
t.eq(elementObservers.length, 1, "one listener registered");
var listener = elementObservers[0];
t.ok(listener.element == div, "element registered");
t.eq(listener.name, name, "name registered");
t.ok(listener.observer == func, "function registered");
t.eq(listener.useCapture, false, "useCapture defaults to false");
//stopObservingElement by element
OpenLayers.Event.stopObservingElement(div);
elementObservers = OpenLayers.Event.observers[cacheID];
t.ok(elementObservers == null, "stopObservingElement by elem works");
//stopObservingElement by id
OpenLayers.Event.stopObservingElement("test");
elementObservers = OpenLayers.Event.observers[newCacheID];
t.ok(elementObservers == null, "stopObservingElement by id works");
//unloadCache by element
OpenLayers.Event.observe(div, name, func);
OpenLayers.Event.unloadCache();
elementObservers = OpenLayers.Event.observers[cacheID];
t.ok(elementObservers == null, "stopObservingElement by elem works");
}
function test_Events_addEventType(t) {
t.plan( 8 );
var mapDiv = OpenLayers.Util.getElement('map');
var obj = {result: 0};
var eventTypes = ["doThingA", "doThingB"];
events = new OpenLayers.Events(obj, mapDiv, eventTypes);
t.eq( events.listeners["doThingA"].length, 0, "event type passed as passed as param to OpenLayers.Events constructor correctly set up" );
t.eq( events.listeners["doThingB"].length, 0, "event type passed as passed as param to OpenLayers.Events constructor correctly set up" );
var newEventType = "onFoo";
t.ok( events.listeners[newEventType] == null, "event type not yet registered has null entry in listeners array");
t.ok( OpenLayers.Util.indexOf(events.eventTypes, newEventType) == -1, "event type not yet registered not in eventTypes array");
events.addEventType(newEventType);
t.eq( events.listeners[newEventType].length, 0, "event type passed to addEventType correctly set up" );
t.ok( OpenLayers.Util.indexOf(events.eventTypes, newEventType) != -1, "event type passed to addEventType in eventTypes array");
var func = function () {};
events.register( "doThingA", obj, func );
t.eq( events.listeners["doThingA"].length, 1, "listener correctly registered" );
events.addEventType("doThingsA");
t.eq( events.listeners["doThingA"].length, 1, "event type passed to addEventType correctly does nothing if clashes with already defined event type" );
}
/** HACK HACK HACK Deprecated This test should be removed in 3.0 **/
function test_Events_globalEventObject(t) {
t.plan(1);
t.ok(Event.stop, "a stop() function exists on the global JS Event object, if indeed it exists. This is legacy deprecated and will be gone in 3.0");
}
</script>
</head>
<body>
<div id="map" style="width: 1024px; height: 512px;"/>
<div id="test"></div>
<div id="test2"></div>
</body>
</html>
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