- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/lang/tests/observable.js
dojo.provide("dojox.lang.tests.observable");
dojo.require("dojox.lang.observable");
(function(){
tests.register("dojox.lang.tests.observable", [
function propertyAccessMakeObservable(t){
console.log("start");
var testStrs = [];
var observable = new dojox.lang.makeObservable(
function(obj,i){
testStrs.push("onRead " + i);
return obj[i];
},
function(obj,i,value){
testStrs.push("onWrite " + i);
obj[i] = value;
},
function(scope,obj,i,args){
testStrs.push("onInvoke " + i);
return obj[i].apply(scope,args);
}
);
var obj = {foo:"bar",test:function(){
return this.foo;
}
};
var newObj = observable(obj);
testStrs.push("returned " + newObj.test());
newObj.foo = "new";
testStrs.push(newObj.foo);
t.assertEqual("onInvoke test,onRead foo,returned bar,onWrite foo,onRead foo,new",testStrs.join(','));
},
function propertyAccessObservable(t){
var testStrs = [];
var obj = {foo:"bar",test:function(){
return this.foo;
}};
var newObj = dojox.lang.observable(obj,function(obj,i){
testStrs.push("onRead " + i);
return obj[i];
},function(obj,i,value){
testStrs.push("onWrite " + i);
obj[i] = value;
},function(scope,obj,i,args){
testStrs.push("onInvoke " + i);
return obj[i].apply(scope,args);
}
);
testStrs.push("returned " + newObj.test());
newObj.foo = "new";
testStrs.push(newObj.foo);
t.assertEqual("onInvoke test,onRead foo,returned bar,onWrite foo,onRead foo,new",testStrs.join(','));
},
function readonlyProxy(t){
console.log("start");
var testStrs = [];
var obj = {foo:"bar"};
var newObj = dojox.lang.ReadOnlyProxy(obj);
testStrs.push(newObj.foo);
newObj.foo = "illegal";
testStrs.push(newObj.foo);
obj.foo = "new";
testStrs.push(newObj.foo);
t.assertEqual("bar,bar,new",testStrs.join(','));
},
function perf(t){
var getter = function(obj,i){
return obj[i];
};
var observable = new dojox.lang.makeObservable(
function(obj,i){
return obj[i];
},
function(obj,i,value){
obj[i] = value;
},
function(scope,obj,i,args){
return obj[i].apply(scope,args);
}
);
var obj = {foo:"bar",bar:'foo'};
var newObj = observable(obj);
var start = new Date().getTime();
for(var i = 0; i < 100000;i++){ // normal access
var a = obj.foo;
a = obj.bar;
}
var store = {
getValue:function(item, property,lazyCallback){
// summary:
// Gets the value of an item's 'property'
//
// item: /* object */
// property: /* string */
// property to look up value for
// lazyCallback: /* function*/
// not part of the API, but if you are using lazy loading properties, you may provide a callback to resume, in order to have asynchronous loading
var value = item[property];
if(value instanceof dojo.Deferred){
dojox.rpc._sync = !lazyCallback; // tell the service to operate synchronously (I have some concerns about the "thread" safety with FF3, as I think it does event stacking on sync calls)
value.addCallback(function(returned){
value = returned;
if(lazyCallback){lazyCallback(value);}
return value;
}
);
delete dojox.rpc._sync; // revert to normal async behavior
}else if(lazyCallback){lazyCallback(value);}
return value;
}
};
console.log(new Date().getTime() - start);
start = new Date().getTime();
for(i = 0; i < 100000;i++){// observed access
a = store.getValue(obj,"foo");
a = store.getValue(obj,"bar");
}
console.log(new Date().getTime() - start);
start = new Date().getTime();
for(i = 0; i < 1000000;i++){ // measure the loop time itself
}
console.log(new Date().getTime() - start);
}
]);
})();
