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Made isObjectLiteral to work correctly with custom objects with empty prototypes.

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This commit is contained in:
Robert Katic 2009-11-12 12:50:40 +08:00 committed by John Resig
parent 1ce92e022d
commit 990d9ca1b0
2 changed files with 14 additions and 3 deletions
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11
src/core.js
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@ -328,13 +328,20 @@ jQuery.extend({
return false;
}
// not own constructor property must be Object
if ( obj.constructor
&& !hasOwnProperty.call(obj, "constructor")
&& !hasOwnProperty.call(obj.constructor.prototype, "isPrototypeOf") ) {
return false;
}
//own properties are iterated firstly,
//so to speed up, we can test last one if it is own or not
var key;
for ( key in obj ) {}
return !key || hasOwnProperty.call( obj, key );
return key === undefined || hasOwnProperty.call( obj, key );
},
isEmptyObject: function( obj ) {

6
test/unit/core.js
View file

@ -553,10 +553,14 @@ test("jQuery.extend(Object, Object)", function() {
same( empty.foo, optionsWithDate.foo, "Dates copy correctly" );
var myKlass = function() {};
var optionsWithCustomObject = { foo: { date: new myKlass } };
empty = {};
jQuery.extend(true, empty, optionsWithCustomObject);
same( empty.foo, optionsWithCustomObject.foo, "Custom objects copy correctly (no methods)" );
// Makes the class a little more realistic
myKlass.prototype = { someMethod: function(){} };
empty = {};
var optionsWithCustomObject = { foo: { date: new myKlass } };
jQuery.extend(true, empty, optionsWithCustomObject);
same( empty.foo, optionsWithCustomObject.foo, "Custom objects copy correctly" );