Deferred: .resolve(), .reject() and .notify() now set the callback co…

…ntext to the promise instance rather than the deferred instance ; .then() has also been amended. Fixes #11405.

src/deferred.js

@@ -32,7 +32,7 @@ jQuery.extend({
 											.fail( newDefer.reject )
 											.progress( newDefer.notify );
 									} else {
-										newDefer[ action + "With" ]( this === deferred ? newDefer : this, [ returned ] );
+										newDefer[ action + "With" ]( this === promise ? newDefer.promise() : this, [ returned ] );
 									}
 								} :
 								newDefer[ action ]
@@ -70,8 +70,11 @@ jQuery.extend({
 				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
 			}
 
-			// deferred[ resolve | reject | notify ] = list.fire
-			deferred[ tuple[0] ] = list.fire;
+			// deferred[ resolve | reject | notify ]
+			deferred[ tuple[0] ] = function() {
+				deferred[ tuple[0] + "With" ]( promise, arguments );
+				return this;
+			};
 			deferred[ tuple[0] + "With" ] = list.fireWith;
 		});
 

test/unit/deferred.js

@@ -292,7 +292,7 @@ test( "jQuery.Deferred.then - context", function() {
 	defer.resolve( 2 );
 
 	piped.done(function( value ) {
-		strictEqual( this.promise(), piped, "default context gets updated to latest defer in the chain" );
+		strictEqual( this, piped, "default context gets updated to latest promise in the chain" );
 		strictEqual( value, 6, "proper value received" );
 	});
 });
@@ -395,8 +395,8 @@ test( "jQuery.when - joined", function() {
 				expected = shouldResolve ? [ 1, 1 ] : [ 0, undefined ],
 				expectedNotify = shouldNotify && [ willNotify[ id1 ], willNotify[ id2 ] ],
 				code = id1 + "/" + id2,
-				context1 = defer1 && jQuery.isFunction( defer1.promise ) ? defer1 : undefined,
-				context2 = defer2 && jQuery.isFunction( defer2.promise ) ? defer2 : undefined;
+				context1 = defer1 && jQuery.isFunction( defer1.promise ) ? defer1.promise() : undefined,
+				context2 = defer2 && jQuery.isFunction( defer2.promise ) ? defer2.promise() : undefined;
 
 			jQuery.when( defer1, defer2 ).done(function( a, b ) {
 				if ( shouldResolve ) {