Index: unit/core.js
===================================================================
--- unit/core.js	(revision 5482)
+++ unit/core.js	(working copy)
@@ -261,7 +261,7 @@
 });
 
 test("add(String|Element|Array|undefined)", function() {
-	expect(8);
+	expect(12);
 	isSet( $("#sndp").add("#en").add("#sap").get(), q("sndp", "en", "sap"), "Check elements from document" );
 	isSet( $("#sndp").add( $("#en")[0] ).add( $("#sap") ).get(), q("sndp", "en", "sap"), "Check elements from document" );
 	equals( $([]).add($("#form")[0].elements).length, 15, "Check elements from array" );
@@ -280,6 +280,11 @@
 	
 	var notDefined;
 	equals( $([]).add(notDefined).length, 0, "Check that undefined adds nothing" );
+	
+	equals( $([]).add([window,document,document.body,document]).length, 3, "Pass an array" );
+	equals( $(document).add(document).length, 1, "Check duplicated elements" );
+	equals( $(window).add(window).length, 1, "Check duplicated elements using the window" );
+	equals( $([]).add( document.getElementById('form') ).length, 15, "Add a form (adds the elements)" );
 });
 
 test("each(Function)", function() {