block-string-assignment-to-HTMLIFrameElement-srcdoc.html

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

  // TrustedHTML assignments do not throw.

  test(t => {

    let p = createHTML_policy(window, 1);

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

    let iframe = document.createElement("iframe");

    iframe.srcdoc = html;

    assert_equals(iframe.srcdoc, RESULTS.HTML);

  }, "iframe.srcdoc assigned via policy (successful HTML transformation).");

  // String assignments throw.

  test(t => {

    let iframe = document.createElement("iframe");

    assert_throws_js(TypeError, _ => {

      iframe.srcdoc = "A string";

});

  }, "`iframe.srcdoc = string` throws.");

  // Null assignment throws.

  test(t => {

    let iframe = document.createElement("iframe");

    assert_throws_js(TypeError, _ => {

      iframe.srcdoc = null;

});

  }, "`iframe.srcdoc = null` throws.");

  // After default policy creation string assignment implicitly calls createHTML

  test(t => {

    let p = window.trustedTypes.createPolicy("default", { createHTML:

      (value, _, sink) => {

        assert_equals(sink, "HTMLIFrameElement srcdoc");

        return createHTMLJS(value);

});

    let iframe = document.createElement("iframe");

    iframe.srcdoc = INPUTS.HTML;

    assert_equals(iframe.srcdoc, RESULTS.HTML);

  }, "`iframe.srcdoc = string` assigned via default policy (successful HTML transformation).");

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

  test(t => {

    let iframe = document.createElement("iframe");

    iframe.srcdoc = null;

    assert_equals(iframe.srcdoc, "null");

  }, "`iframe.srcdoc = null` assigned via default policy does not throw");

</script>