File: javascript-url-srcdoc-cross-origin-iframe-inheritance.html

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <title>Content Security Policy: nested inheritance</title>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
</head>
<body>
  <script>
    // This test creates a page with CSP: frame-src 'self'. The page is
    // navigated to a javascript URL creating a cross-origin iframe inside a
    // srcdoc iframe. If everything works correctly, the cross-origin iframe
    // should be blocked.
    //
    // Note that most of the logic is performed by the iframe. This file is only
    // for managing testharness assertions.
    async_test(t => {
      window.addEventListener("message", t.step_func(function(e) {
        if (e.data === "frame allowed") {
          assert_unreached("Frame should have been blocked.");
        } else if (e.data === "frame blocked") {
          t.done();
        }
      }));
    }, "Nested cross-origin iframe should be blocked by frame-src 'self'.");
  </script>
  <iframe src="./support/javascript-url-srcdoc-cross-origin-iframe-inheritance-helper.sub.html"></iframe>
</body>