chromium/third_party/blink/web_tests/external/wpt/editing/other/html-text-copy-paste-of-anchor-with-href-in-content-editable.html

<!doctype html>
<meta charset=utf-8>
<title>This test is for testing HTML text copy paste of anchor tag containing href
inside contenteditable.</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div contenteditable="true" id="contentCopy"><a href="www.crbug.com/356548150">AnchorTagWithHREF</a></div>
<div contenteditable="true" id="contentPaste"></div>
<script>

function runTests() {
    test(function() {
        const range = document.createRange();
        const contentToCopy = document.getElementById('contentCopy');
        range.selectNodeContents(contentToCopy);
        const selection = window.getSelection();
        const anchorToCopy = contentToCopy.querySelector('a');
        selection.removeAllRanges();
        selection.addRange(range);
        document.execCommand('copy');
        assert_true(anchorToCopy.hasAttribute('href'));
        const pasteTarget = document.getElementById('contentPaste');
        pasteTarget.focus();
        document.execCommand('paste');
        const pastedAnchor = pasteTarget.querySelector('a');
        assert_true(pastedAnchor.hasAttribute('href'));
    }, "Attribute href is missing after copy paste of anchor tag");
}

window.addEventListener("load", runTests, {once: true});
</script>