Fix #13937: Correctly scope .finish() following multi-element .animate()....

Fix #13937: Correctly scope .finish() following multi-element .animate(). Thanks @gnarf37. Close gh-1279.
(cherry picked from commit ae9e05e9)

src/effects.js

@@ -488,9 +488,7 @@ jQuery.fn.extend({
 			doAnimation = function() {
 				// Operate on a copy of prop so per-property easing won't be lost
 				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
-				doAnimation.finish = function() {
-					anim.stop( true );
-				};
+
 				// Empty animations, or finishing resolves immediately
 				if ( empty || data_priv.get( this, "finish" ) ) {
 					anim.stop( true );
@@ -570,8 +568,8 @@ jQuery.fn.extend({
 			// empty the queue first
 			jQuery.queue( this, type, [] );
 
-			if ( hooks && hooks.cur && hooks.cur.finish ) {
-				hooks.cur.finish.call( this );
+			if ( hooks && hooks.stop ) {
+				hooks.stop.call( this, true );
 			}
 
 			// look for any active animations, and finish them

src/queue.js

@@ -35,7 +35,6 @@ jQuery.extend({
 			startLength--;
 		}
 
-		hooks.cur = fn;
 		if ( fn ) {
 
 			// Add a progress sentinel to prevent the fx queue from being

test/unit/effects.js

@@ -2096,21 +2096,47 @@ test( ".finish( \"custom\" ) - custom queue animations", function() {
 });
 
 test( ".finish() calls finish of custom queue functions", function() {
-	function queueTester() {
-
+	function queueTester( next, hooks ) {
+		hooks.stop = function( gotoEnd ) {
+			inside++;
+			equal( this, div[0] );
+			ok( gotoEnd, "hooks.stop(true) called");
+		};
 	}
-	var div = jQuery( "<div>" );
+	var div = jQuery( "<div>" ),
+		inside = 0,
+		outside = 0;
 
-	expect( 3 );
+	expect( 6 );
 	queueTester.finish = function() {
+		outside++;
 		ok( true, "Finish called on custom queue function" );
 	};
 
 	div.queue( queueTester ).queue( queueTester ).queue( queueTester ).finish();
 
+	equal( inside, 1, "1 stop(true) callback" );
+	equal( outside, 2, "2 finish callbacks" );
+
 	div.remove();
 });
 
+asyncTest( ".finish() is applied correctly when multiple elements were animated (#13937)", function() {
+	expect( 3 );
+
+	var elems = jQuery("<a>0</a><a>1</a><a>2</a>");
+
+	elems.animate( { opacity: 0 }, 1500 ).animate( { opacity: 1 }, 1500 );
+	setTimeout(function() {
+		elems.eq( 1 ).finish();
+		ok( !elems.eq( 1 ).queue().length, "empty queue for .finish()ed element" );
+		ok( elems.eq( 0 ).queue().length, "non-empty queue for preceding element" );
+		ok( elems.eq( 2 ).queue().length, "non-empty queue for following element" );
+		elems.stop( true );
+		start();
+	}, 100 );
+});
+
 asyncTest( "slideDown() after stop() (#13483)", 2, function() {
 	var ul = jQuery( "<ul style='height: 100px;display: block'></ul>" ),
 		origHeight = ul.height();