<!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>
<script>
  // TrustedURL assignments do not throw.
  let p = createHTML_policy(window, 1);
  test(t => {
    document.body.innerText = '';
    let html = p.createHTML(INPUTS.HTML);
    document.write(html);
    assert_equals(document.body.innerText, RESULTS.HTML);
  }, "document.write with html assigned via policy (successful URL transformation).");

  // TrustedURL assignments do not throw. (Now for writeln.)
  test(t => {
    document.body.innerText = '';
    let html = p.createHTML(INPUTS.HTML);
    document.writeln(html);
    assert_equals(document.body.innerText, RESULTS.HTML);
  }, "document.writeln with html assigned via policy (successful URL transformation).");

  // String assignments throw.
  test(t => {
    const old = document.body.innerText;
    assert_throws_js(TypeError, _ => {
      document.write('A string');
    });
    assert_equals(document.body.innerText, old);
  }, "`document.write(string)` throws");

  // String assignments throw. (Now for writeln.)
  test(t => {
    const old = document.body.innerText;
    assert_throws_js(TypeError, _ => {
      document.writeln('A string');
    });
    assert_equals(document.body.innerText, old);
  }, "`document.writeln(string)` throws");

  // Null assignment throws.
  test(t => {
    const old = document.body.innerText;
    assert_throws_js(TypeError, _ => {
      document.write(null);
    });
    assert_equals(document.body.innerText, old);
  }, "`document.write(null)` throws");

  // Null assignment throws. (Now for writeln.)
  test(t => {
    const old = document.body.innerText;
    assert_throws_js(TypeError, _ => {
      document.writeln(null);
    });
    assert_equals(document.body.innerText, old);
  }, "`document.writeln(null)` throws");

  let default_policy = trustedTypes.createPolicy('default',
      { createHTML: createHTMLJS }, true );

  // Default policy works.
  test(t => {
    document.body.innerText = '';
    document.write(INPUTS.HTML);
    assert_equals(document.body.innerText, RESULTS.HTML);
  }, "`document.write(string)` observes default policy");

  // Default policy works. (Now for writeln.)
  test(t => {
    document.body.innerText = '';
    document.writeln(INPUTS.HTML);
    assert_equals(document.body.innerText, RESULTS.HTML);
  }, "`document.writeln(string)` observes default policy");
</script>
