TrustedTypePolicyFactory-constants.html

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This WPT test may be referenced by the following Test IDs:
- /trusted-types/TrustedTypePolicyFactory-constants.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="support/helper.sub.js"></script>

<body>

<script>

  test(t => {

    const empty = trustedTypes.emptyHTML;

    assert_true(trustedTypes.isHTML(empty));

    assert_equals(empty.toString(), "");

  }, 'trustedTypes.emptyHTML returns the intended value.');

  test(t => {

    try { trustedTypes.emptyHTML = 'fake'; } catch { }

    assert_true(trustedTypes.isHTML(trustedTypes.emptyHTML));

    assert_equals(trustedTypes.emptyHTML.toString(), "");

  }, 'trustedTypes.emptyHTML cannot be redefined.');

  test(t => {

    try { Object.defineProperty(TrustedTypes, 'emptyHTML', 'fake'); } catch { }

    assert_true(trustedTypes.isHTML(trustedTypes.emptyHTML));

    assert_equals(trustedTypes.emptyHTML.toString(), "");

  }, 'trustedTypes.emptyHTML cannot be redefined via defineProperty.');

  test(t => {

    const empty = trustedTypes.emptyScript;

    assert_true(trustedTypes.isScript(empty));

    assert_equals(empty.toString(), "");

  }, 'trustedTypes.emptyScript returns the intended value.');

  test(t => {

    try { trustedTypes.emptyScript = 'fake'; } catch { }

    assert_true(trustedTypes.isScript(trustedTypes.emptyScript));

    assert_equals(trustedTypes.emptyScript.toString(), "");

  }, 'trustedTypes.emptyScript cannot be redefined.');

  test(t => {

    try { Object.defineProperty(TrustedTypes, 'emptyScript', 'fake'); } catch { }

    assert_true(trustedTypes.isScript(trustedTypes.emptyScript));

    assert_equals(trustedTypes.emptyScript.toString(), "");

  }, 'trustedTypes.emptyScript cannot be redefined via defineProperty.');

</script>