Check computed visibility in addition to :visible

Correct assertions according to fixed condition

Author: westonruter

tests/unit/core/selector.js

@@ -130,14 +130,14 @@ test( "focusable - hidden styles", function() {
 	isNotFocusable( "#displayNoneAncestor-input", "input, display: none parent" );
 	isNotFocusable( "#displayNoneAncestor-span", "span with tabindex, display: none parent" );
 
-	isFocusable( "#visibilityHiddenAncestor-input", "input, visibility: hidden parent" );
-	isFocusable( "#visibilityHiddenAncestor-span", "span with tabindex, visibility: hidden parent" );
+	isNotFocusable( "#visibilityHiddenAncestor-input", "input, visibility: hidden parent" );
+	isNotFocusable( "#visibilityHiddenAncestor-span", "span with tabindex, visibility: hidden parent" );
 
 	isNotFocusable( "#displayNone-input", "input, display: none" );
-	isFocusable( "#visibilityHidden-input", "input, visibility: hidden" );
+	isNotFocusable( "#visibilityHidden-input", "input, visibility: hidden" );
 
 	isNotFocusable( "#displayNone-span", "span with tabindex, display: none" );
-	isFocusable( "#visibilityHidden-span", "span with tabindex, visibility: hidden" );
+	isNotFocusable( "#visibilityHidden-span", "span with tabindex, visibility: hidden" );
 });
 
 test( "focusable - natively focusable with various tabindex", function() {
@@ -215,14 +215,14 @@ test( "tabbable - hidden styles", function() {
 	isNotTabbable( "#displayNoneAncestor-input", "input, display: none parent" );
 	isNotTabbable( "#displayNoneAncestor-span", "span with tabindex, display: none parent" );
 
-	isTabbable( "#visibilityHiddenAncestor-input", "input, visibility: hidden parent" );
-	isTabbable( "#visibilityHiddenAncestor-span", "span with tabindex, visibility: hidden parent" );
+	isNotTabbable( "#visibilityHiddenAncestor-input", "input, visibility: hidden parent" );
+	isNotTabbable( "#visibilityHiddenAncestor-span", "span with tabindex, visibility: hidden parent" );
 
 	isNotTabbable( "#displayNone-input", "input, display: none" );
-	isTabbable( "#visibilityHidden-input", "input, visibility: hidden" );
+	isNotTabbable( "#visibilityHidden-input", "input, visibility: hidden" );
 
 	isNotTabbable( "#displayNone-span", "span with tabindex, display: none" );
-	isTabbable( "#visibilityHidden-span", "span with tabindex, visibility: hidden" );
+	isNotTabbable( "#visibilityHidden-span", "span with tabindex, visibility: hidden" );
 });
 
 test( "tabbable -  natively tabbable with various tabindex", function() {

ui/focusable.js

@@ -42,7 +42,7 @@ $.ui.focusable = function( element, hasTabindex ) {
 		"a" === nodeName ?
 			element.href || hasTabindex :
 			hasTabindex ) &&
-		$( element ).is( ":visible" );
+		$( element ).is( ":visible" ) && $( element ).css( "visibility" ) === "visible";
 };
 
 $.extend( $.expr[ ":" ], {