LayoutTests/accessibility/visible-elements.html

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../resources/js-test.js"></script>
<script src="../resources/accessibility-helper.js"></script>
</head>
<body>

<a href="#first-link">more</a><BR>
<div id="hidden-div" style="visibility: hidden; left: 0px;"><a href="#second-link">hello</a></div>
    
<script>
    description("This test ensures that document links appropriately respect a link's visibility.")

    function numberOfSubstringOccurences(string, substring) {
        return string.split(substring).length - 1;
    }

    if (window.accessibilityController) {
        window.jsTestIsAsync = true;

        var webarea, initialDocumentLinks, finalDocumentLinks;
        setTimeout(async function() {
            webarea = accessibilityController.rootElement.childAtIndex(0);
            initialDocumentLinks = webarea.attributesOfDocumentLinks();
            shouldBeTrue("initialDocumentLinks.includes('#first-link')")
            shouldBeFalse("initialDocumentLinks.includes('#second-link')")
            shouldBe("numberOfSubstringOccurences(initialDocumentLinks, 'AXRole: AXLink')", "1")
 
            document.getElementById("hidden-div").style.visibility = "visible";
            await waitFor(() => {
                finalDocumentLinks = webarea.attributesOfDocumentLinks();
                return finalDocumentLinks && initialDocumentLinks != finalDocumentLinks;
            });
            shouldBeTrue("finalDocumentLinks.includes('#first-link')")
            shouldBeTrue("finalDocumentLinks.includes('#second-link')")
            shouldBe("numberOfSubstringOccurences(finalDocumentLinks, 'AXRole: AXLink')", "2")

            finishJSTest();
        }, 0);
    }
</script>
</body>
</html>