block-string-assignment-to-DOMParser-parseFromString.html

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This WPT test may be referenced by the following Test IDs:
- /trusted-types/block-string-assignment-to-DOMParser-parseFromString.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>

<meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script';">

<body>

<script>

  // Trusted HTML assignments do not throw.

  test(t => {

    let p = createHTML_policy(window, 1);

    let html = p.createHTML(INPUTS.HTML);

    let parser = new DOMParser();

    let doc = parser.parseFromString(html, "text/html");

    assert_equals(doc.body.innerText, RESULTS.HTML);

  }, "document.innerText assigned via policy (successful HTML transformation).");

  // String assignments throw.

  test(t => {

    var parser = new DOMParser();

    assert_throws_js(TypeError, _ => {

      var doc = parser.parseFromString("Fail", "text/html");

});

  }, "`document.innerText = string` throws.");

  // Null assignment throws.

  test(t => {

    var parser = new DOMParser();

    assert_throws_js(TypeError, _ => {

      var doc = parser.parseFromString(null, "text/html");

});

  }, "'document.innerText = null' throws");

  // After default policy creation string assignment implicitly calls createHTML.

  test(t => {

    let p = window.trustedTypes.createPolicy("default", { createHTML: createHTMLJS }, true);

    let parser = new DOMParser();

    let doc = parser.parseFromString(INPUTS.HTML, "text/html");

    assert_equals(doc.body.innerText, RESULTS.HTML);

  }, "'document.innerText = string' assigned via default policy (successful HTML transformation).");

  // After default policy creation null assignment implicitly calls createHTML.

  test(t => {

    var parser = new DOMParser();

    var doc = parser.parseFromString(null, "text/html");

    assert_equals(doc.body.innerText, "null");

  }, "'document.innerText = null' assigned via default policy does not throw");

</script>