2773: first pass adding node/jQuery object support to jQuery.fn.find; unit tests added

src/core.js

@@ -88,7 +88,7 @@ jQuery.fn = jQuery.prototype = {
 		if ( selector === "body" && !context && document.body ) {
 			this.context = document;
 			this[0] = document.body;
-			this.selector = "body";
+			this.selector = selector;
 			this.length = 1;
 			return this;
 		}

src/traversing.js

@@ -17,17 +17,30 @@ var runtil = /Until$/,
 
 jQuery.fn.extend({
 	find: function( selector ) {
-		var ret = this.pushStack( "", "find", selector ),
-			length = 0;
+		var self = this,
+			ret, i, l;
+
+		if ( typeof selector !== "string" ) {
+			return jQuery( selector ).filter(function() {
+				for ( i = 0, l = self.length; i < l; i++ ) {
+					if ( jQuery.contains( self[ i ], this ) ) {
+						return true;
+					}
+				}
+			});
+		}
 
-		for ( var i = 0, l = this.length; i < l; i++ ) {
+		ret = this.pushStack( "", "find", selector );
+		
+		var length, n, r;
+		for ( i = 0, l = this.length; i < l; i++ ) {
 			length = ret.length;
 			jQuery.find( selector, this[i], ret );
 
 			if ( i > 0 ) {
 				// Make sure that the results are unique
-				for ( var n = length; n < ret.length; n++ ) {
-					for ( var r = 0; r < length; r++ ) {
+				for ( n = length; n < ret.length; n++ ) {
+					for ( r = 0; r < length; r++ ) {
 						if ( ret[r] === ret[n] ) {
 							ret.splice(n--, 1);
 							break;

test/unit/traversing.js

@@ -14,12 +14,27 @@ test("find(String)", function() {
 });
 
 test("find(node|jQuery object)", function() {
-	expect( 2 );
+	expect( 11 );
+	
+	var $foo = jQuery('#foo'),
+		$blog = jQuery('.blogTest'),
+		$first = jQuery('#first'),
+		$two = $blog.add( $first ),
+		$fooTwo = $foo.add( $blog );
+
+	equals( $foo.find( $blog ).text(), 'Yahoo', 'Find with blog jQuery object' );
+	equals( $foo.find( $blog[0] ).text(), 'Yahoo', 'Find with blog node' );
+	equals( $foo.find( $first ).length, 0, '#first is not in #foo' );
+	equals( $foo.find( $first[0]).length, 0, '#first not in #foo (node)' );
+	ok( $foo.find( $two ).is('.blogTest'), 'Find returns only nodes within #foo' );
+	ok( $fooTwo.find( $blog ).is('.blogTest'), 'Blog is part of the collection, but also within foo' );
+	ok( $fooTwo.find( $blog[0] ).is('.blogTest'), 'Blog is part of the collection, but also within foo(node)' );
+	
+	equals( $two.find( $foo ).length, 0, 'Foo is not in two elements' );
+	equals( $two.find( $foo[0] ).length, 0, 'Foo is not in two elements(node)' );
+	equals( $two.find( $first ).length, 0, 'first is in the collection and not within two' );
+	equals( $two.find( $first ).length, 0, 'first is in the collection and not within two(node)' );
 	
-	var $blog = jQuery('.blogTest'),
-		blog = $blog[0];
-	equals( jQuery('#foo').find( $blog ).text(), 'Yahoo', 'Find with blog jQuery object' );
-	equals( jQuery('#foo').find( blog ).text(), 'Yahoo', 'Find with blog node' );
 });
 
 test("is(String)", function() {