wpt/trusted-types/script-enforcement-005.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/namespaces.js"></script>
<script src="support/passthroughpolicy.js"></script>
<script src="support/script-messages.js"></script>
<link rel="help" href="https://un5gnp8dyv5rcyxcrjjbfp0.julianrbryant.com/trusted-types/dist/spec/#enforcement-in-scripts">
<link rel="help" href="https://un5nj90kzk5vf152hgyfw29h1eja2.julianrbryant.com/#prepare-the-script-element">
<meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script';">
<!-- This test covers the following step from the "prepare the script element"
     algorithm, verifying that "source text" is the one after application of
     the default policy: "If el has no src attribute, and source text is the
     empty string, then return." -->
<div id="htmlContainer">
  <script id="scriptToCreateNonEmptyHTMLScript" type="unknown">;</script>
</div>
<svg id="svgContainer">
  <script id="scriptToCreateNonEmptySVGScript" type="unknown">;</script>
</svg>
<script>
  // Define a default policy that transforms empty script string to some source
  // logging a RUN message and other script strings to empty.
  trustedTypes.createPolicy("default", {
    createScript: (value, _, sink) => {
      window.log_message("CREATE_SCRIPT");
      window.log_message(sink);
      return value.length ? "" : LOG_RUN_MESSAGE;
    }
  });

  promise_test(async t => {
    let messages = await script_messages_for(_ => {
      // Current version of the specification requires the script text to change
      // in order to force a call to the default policy callback with sink
      // "HTMLScriptElement text". If the following PR is accepted, this could
      // be simplified to create_html_script_with_untrusted_source_text("").
      // https://github.com/w3c/trusted-types/pull/579
      let script = document.getElementById("scriptToCreateNonEmptyHTMLScript");
      script.remove();
      script.removeAttribute("type");
      script.firstChild.remove();
      htmlContainer.appendChild(script);
    });
    assert_array_equals(messages, ["CREATE_SCRIPT", "HTMLScriptElement text", "RUN"]);
  }, "Empty HTMLScriptElement is executed if the default policy makes it non-empty.");

  promise_test(async t => {
    let messages = await script_messages_for(_ => {
      let script = create_html_script_with_untrusted_source_text(LOG_RUN_MESSAGE);
      htmlContainer.appendChild(script);
    });
    assert_array_equals(messages, ["CREATE_SCRIPT", "HTMLScriptElement text"]);

  }, "Non-empty HTMLScriptElement is not executed if the default policy makes it empty.");

  promise_test(async t => {
    let messages = await script_messages_for(_ => {
      // Note: Using create_html_script_with_untrusted_source_text("") may not
      // guarantee the script to be untrusted for implementations using a
      // script-based enforcement mechanism. So make sure we do modify the text.
      let script = document.getElementById("scriptToCreateNonEmptySVGScript");
      script.remove();
      script.removeAttribute("type");
      script.firstChild.remove();
      svgContainer.appendChild(script);
    });
    assert_array_equals(messages, ["CREATE_SCRIPT", "SVGScriptElement text", "RUN"]);
  }, "Empty SVGScriptElement is executed if the default policy makes it non-empty.");

  promise_test(async t => {
    let messages = await script_messages_for(_ => {
      let script = create_svg_script_with_untrusted_source_text(LOG_RUN_MESSAGE);
      svgContainer.appendChild(script);
    });
    assert_array_equals(messages, ["CREATE_SCRIPT", "SVGScriptElement text"]);

  }, "Non-empty SVGScriptElement is not executed if the default policy makes it empty.");
</script>