<!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');

  // Trusted HTML assignments do not throw.
  test(t => {
    let p = createHTML_policy(window, 1);
    let html = p.createHTML(INPUTS.HTML);
    let before = 'before';
    let after = 'after';
    let htmlBefore = p.createHTML(before);
    let htmlAfter = p.createHTML(after);

    var d = document.createElement('div');
    container.appendChild(d);

    d.insertAdjacentHTML('beforebegin', html);
    assert_equals(d.previousSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.previousSibling.data, RESULTS.HTML);

    d.insertAdjacentHTML('afterbegin', htmlBefore);
    d.insertAdjacentHTML('beforeend', htmlAfter);
    assert_equals(d.innerHTML, before + after);

    d.insertAdjacentHTML('afterend', html);
    assert_equals(d.nextSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.nextSibling.data, RESULTS.HTML);

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

  // String assignments throw.
  test(t => {
    var d = document.createElement('div');
    container.appendChild(d);

    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('beforebegin', "<p>Fail</p>");
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('afterbegin', "<p>Fail</p>");
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('beforeend', "<p>Fail</p>");
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('afterend', "<p>Fail</p>");
    });

    assert_equals(d.previousSibling, null);
    assert_equals(d.firstChild, null);
    assert_equals(d.lastChild, null);
    assert_equals(d.nextSibling, null);

    while (container.firstChild)
      container.firstChild.remove();
  }, "`insertAdjacentHTML(string)` throws.");

  // Null assignment throws.
  test(t => {
    var d = document.createElement('div');
    container.appendChild(d);

    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('beforebegin', null);
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('afterbegin', null);
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('beforeend', null);
    });
    assert_throws_js(TypeError, _ => {
      d.insertAdjacentHTML('afterend', null);
    });

    assert_equals(d.previousSibling, null);
    assert_equals(d.firstChild, null);
    assert_equals(d.lastChild, null);
    assert_equals(d.nextSibling, null);
  }, "`insertAdjacentHTML(null)` throws.");

  // After default policy creation string assignment implicitly calls createHTML.
  test(t => {
    let p = window.trustedTypes.createPolicy("default", { createHTML: createHTMLJS }, true);

    var d = document.createElement('div');
    container.appendChild(d);

    d.insertAdjacentHTML('beforebegin', INPUTS.HTML);
    assert_equals(d.previousSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.previousSibling.data, RESULTS.HTML);

    d.insertAdjacentHTML('afterbegin', INPUTS.HTML);
    assert_equals(d.firstChild.nodeType, Node.TEXT_NODE);
    assert_equals(d.firstChild.data, RESULTS.HTML);

    d.insertAdjacentHTML('beforeend', INPUTS.HTML);
    assert_equals(d.lastChild.nodeType, Node.TEXT_NODE);
    assert_equals(d.lastChild.data, RESULTS.HTML);

    d.insertAdjacentHTML('afterend', INPUTS.HTML);
    assert_equals(d.nextSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.nextSibling.data, RESULTS.HTML);

    while (container.firstChild)
      container.firstChild.remove();
  }, "`insertAdjacentHTML(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.insertAdjacentHTML('beforebegin', null);
    assert_equals(d.previousSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.previousSibling.data, "null");

    d.insertAdjacentHTML('afterbegin', null);
    assert_equals(d.firstChild.nodeType, Node.TEXT_NODE);
    assert_equals(d.firstChild.data, "null");

    d.insertAdjacentHTML('beforeend', null);
    assert_equals(d.lastChild.nodeType, Node.TEXT_NODE);
    assert_equals(d.lastChild.data, "null");

    d.insertAdjacentHTML('afterend', null);
    assert_equals(d.nextSibling.nodeType, Node.TEXT_NODE);
    assert_equals(d.nextSibling.data, "null");

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