wpt/trusted-types/modify-attributes-in-callback.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<head>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <meta http-equiv="Content-Security-Policy"
        content="require-trusted-types-for 'script'; trusted-types *">
</head>
<body>
<iframe id="iframe" data-x="" srcdoc="content" onmouseover=""></iframe>
<div id="div"></div>
<script>
  // This is a regression test for https://g-issues.chromium.org/issues/333739948
  // The test should hold true for any browser that supports Trusted Types.

  let iframeAttributeRemovedInCallback = null;

  let attr = document.createAttribute('onclick');
  attr.value = 'setAttributeNode';
  let createScriptCalledForOnClickAttrNode = false;

  trustedTypes.createPolicy("default", {
    createHTML: (s, _, sink) => {
      if (iframeAttributeRemovedInCallback) {
        assert_equals(sink, 'HTMLIFrameElement srcdoc');
        iframe.removeAttribute(iframeAttributeRemovedInCallback);
      }
      return s;
    },
    createScript: (s) => {
      if (s == 'accepted') {
        return s;
      }

      if (createScriptCalledForOnClickAttrNode && s === 'setAttributeNode') {
          return s;
      }

      if (s === 'setAttributeNode') {
        createScriptCalledForOnClickAttrNode = true;
        document.documentElement.setAttributeNode(attr);
      } else {
        div.setAttribute('onmouseover', 'accepted');
      }

      return s;
    }
  });

  function cleanUpIFrameTest() {
    iframeAttributeRemovedInCallback = null;
    iframe.setAttribute("srcdoc", "content");
    iframe.setAttribute("data-x", "");
  }

  test(t => {
    // Original bug report: Delete an attribute *before* the current one.
    t.add_cleanup(cleanUpIFrameTest);
    iframeAttributeRemovedInCallback = "data-x";
    assert_equals(iframe.srcdoc, "content");
    assert_equals(iframe.getAttribute("onmouseover"), "");
    iframe.setAttribute("srcdoc", "alert(1)");
    assert_equals(iframe.srcdoc, "alert(1)");
    assert_equals(iframe.getAttribute("onmouseover"), "");
  }, "Ensure the right attributes are modified.");

  test(t => {
    // Second case: Delete the exact attribute. It still gets set.
    t.add_cleanup(cleanUpIFrameTest);
    iframeAttributeRemovedInCallback = "srcdoc";
    assert_equals(iframe.srcdoc, "content");
    iframe.setAttribute("srcdoc", "new srcdoc value");
    assert_equals(iframe.srcdoc, "new srcdoc value");
  }, "Ensure the deleted attributes is modified.");

  test(t => {
    t.add_cleanup(cleanUpIFrameTest);
    iframeAttributeRemovedInCallback = "data-x";
    assert_equals(iframe.srcdoc, "content");
    assert_equals(iframe.getAttribute("onmouseover"), "");
    iframe.setAttributeNS(null, "srcdoc", "alert(1)");
    assert_equals(iframe.srcdoc, "alert(1)");
    assert_equals(iframe.getAttribute("onmouseover"), "");
  }, "Ensure the right attributes are modified (setAttributeNS).");

  test(t => {
    t.add_cleanup(cleanUpIFrameTest);
    iframeAttributeRemovedInCallback = "srcdoc";
    assert_equals(iframe.srcdoc, "content");
    iframe.setAttributeNS(null, "srcdoc", "new srcdoc value");
    assert_equals(iframe.srcdoc, "new srcdoc value");
  }, "Ensure the deleted attributes is modified (setAttributeNS).");

  function cleanUpDivTest() {
      div.removeAttribute('onmouseover');
      try {
          div.removeAttributeNode(attr);
      } catch (e) {

      }
      try {
          document.documentElement.removeAttributeNode(attr);
      } catch (e) {

      }
      createScriptCalledForOnClickAttrNode = false;
  }
  const expectedAttributeCount = 2; // id and onmouseover.

  test(t => {
    t.add_cleanup(cleanUpDivTest);
    div.toggleAttribute('onmouseover');
    assert_equals(div.attributes.length, expectedAttributeCount);
    assert_equals(div.attributes.onmouseover.value, '');
  }, "Ensure toggleAttribute results in an empty attribute.");

  test(t => {
    t.add_cleanup(cleanUpDivTest);
    div.setAttribute('onmouseover', 'foo');
    assert_equals(div.attributes.length, expectedAttributeCount);
    assert_equals(div.attributes.onmouseover.value, 'foo');
  }, "Ensure setAttribute results in right attribute value.");

  test(t => {
    t.add_cleanup(cleanUpDivTest);
    div.setAttributeNS(null, 'onmouseover', 'foo');
    assert_equals(div.attributes.length, expectedAttributeCount);
    assert_equals(div.attributes.onmouseover.value, 'foo');
  }, "Ensure setAttributeNS results in right attribute value.");

  test(t => {
    t.add_cleanup(cleanUpDivTest);
    let exception = null;
    try {
        div.setAttributeNode(attr);
    } catch (e) {
        exception = e;
    }
    assert_true(exception instanceof DOMException, `DOMException exception reported`);
    assert_equals(exception?.name, 'InUseAttributeError', `DOMException name is InUseAttributeError`);
  }, "Ensure setAttributeNode throws InUseAttributeError when callback assigns attributes.");

  test(t => {
    t.add_cleanup(cleanUpDivTest);
    let exception = null;
    try {
        div.setAttributeNodeNS(attr);
    } catch (e) {
        exception = e;
    }
    assert_true(exception instanceof DOMException, `DOMException exception reported`);
    assert_equals(exception?.name, 'InUseAttributeError', `DOMException name is InUseAttributeError`);
  }, "Ensure setAttributeNodeNS throws InUseAttributeError when callback assigns attributes.");

</script>