content-security-policy/inheritance/blob-url-inherits-from-initiator.sub.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Blob URL inherits CSP from initiator.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  let testCases = [
    {
      initiator_origin: window.origin,
      name: "Initiator is same-origin with target frame.",
    },
    {
      initiator_origin: "http://{{hosts[alt][]}}:{{ports[http][0]}}",
      name: "Initiator is cross-origin with target frame.",
    },
  ];

  testCases.forEach(test => {
    async_test(t => {
      // Create a popup. At the beginning, the popup has no CSPs.
      let target = window.open();
      t.add_cleanup(() => target.close());

      // Create a child frame in the popup. The child frame has
      // Content-Security-Policy: script-src 'unsafe-inline'. The child frame
      // will navigate the popup to a blob URL, which will try if eval is
      // allowed and message back.
      let initiator = target.document.createElement('iframe');
      initiator.sandbox = "allow-scripts allow-same-origin allow-top-navigation";
      initiator.src = test.initiator_origin +
        "/content-security-policy/inheritance/support/navigate-parent-to-blob.html";

      window.addEventListener("message", t.step_func(e => {
        if (e.source !== target) return;
        assert_equals(e.data, "eval blocked",
                      "Eval should be blocked by CSP in blob URL.");
        t.done();
      }));

      target.document.body.appendChild(initiator);
    }, test.name);
  });
</script>