wpt/trusted-types/block-string-assignment-to-Element-outerHTML.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html>
<head>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script src="support/helper.sub.js"></script>

  <meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script';">
</head>
<body>
<div id="container"></div>
<script>
  var container = document.querySelector('#container')

  // TrustedHTML assignments do not throw.
  test(t => {
    let p = createHTML_policy(window, 1);
    let html = p.createHTML(INPUTS.HTML);

    var d = document.createElement('div');
    document.querySelector('#container').appendChild(d);
    d.outerHTML = html;
    assert_equals(container.innerText, RESULTS.HTML);

    while (container.firstChild)
      container.firstChild.remove();
  }, "outerHTML with html assigned via policy (successful HTML transformation).");

  test(t => {
    let p = createHTML_policy(window, 1);
    assert_throws_dom("NoModificationAllowedError", _ => {
      document.documentElement.outerHTML = p.createHTML('<p>Content</p>');
    });
  }, "`outerHTML = TrustedHTML` throws NoModificationAllowedError when parent is a document.");

  // String assignments throw.
  test(t => {
    var d = document.createElement('div');
    container.appendChild(d);
    assert_throws_js(TypeError, _ => {
      d.outerHTML = "Fail.";
    });
    assert_equals(container.innerText, "");
    while (container.firstChild)
      container.firstChild.remove();
  }, "`outerHTML = string` throws.");

  test(t => {
    assert_throws_js(TypeError, _ => {
      document.documentElement.outerHTML = '<p>Content</p>';
    });
  }, "`outerHTML = string` throws TypeError even when parent is a document.");

  // Null assignment throws.
  test(t => {
    var d = document.createElement('div');
    container.appendChild(d);
    assert_throws_js(TypeError, _ => {
      d.outerHTML = null;
    });
    assert_equals(container.innerText, "");
    while (container.firstChild)
      container.firstChild.remove();
  }, "`outerHTML = null` throws.");

  // After default policy creation string assignment implicitly calls createHTML.
  test(t => {
    let p = window.trustedTypes.createPolicy("default", {
      createHTML: (value, type, sink) => {
        assert_equals(sink, "Element outerHTML");
        return createHTMLJS(value);
      }
    });

    var d = document.createElement('div');
    document.querySelector('#container').appendChild(d);
    d.outerHTML = INPUTS.HTML;
    assert_equals(container.innerText, RESULTS.HTML);

    while (container.firstChild)
      container.firstChild.remove();
  }, "`outerHTML = string` assigned via default policy (successful HTML transformation).");

  // After default policy creation null assignment implicitly calls createHTML.
  test(t => {
    var d = document.createElement('div');
    container.appendChild(d);
    d.outerHTML = null;
    assert_equals(container.innerText, "");

    while (container.firstChild)
      container.firstChild.remove();
  }, "`outerHTML = null` assigned via default policy does not throw");
</script>
</body>
</html>