response_block.tentative.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /fetch/corb/response_block.tentative.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<body>

<script>

// A cross-origin response containing JavaScript, labelled as text/csv.

const probeUrl = get_host_info().HTTPS_REMOTE_ORIGIN +

    "/fetch/corb/resources/response_block_probe.js";

// Test handling of blocked responses in CORB/ORB for <script> elements.

function probe_script() {

  // We will cross-origin load a script resource that should get blocked by all

  // versions of CORB/ORB. Two things may happen:

//

  // 1, An empty response is injected. (What CORB does.)

  // 2, An error is injected and script loading aborts. (What ORB does.)

  // Load the probe as a script.

  const script = document.createElement("script");

  script.src = probeUrl;

  document.body.appendChild(script);

  // Return a promise that will return a string description corresponding to the

  // conditions above.

  return new Promise((resolve, reject) => {

    script.onload = _ => resolve("Resource loaded (expected for CORB)");

    script.onerror = _ => resolve("ORB-style network error");

});

// Test handling of blocked responses in CORB/ORB for script-initiated fetches.

function probe_fetch() {

  return fetch(probeUrl, {mode: "no-cors"})

    .then(response => response.text())

    .then(text => {

        assert_equals(text, "");

        return "Resource loaded (expected for CORB)";

})

    .catch(_ => "ORB-style network error");

// These tests check for ORB behaviour.

promise_test(t => probe_script().then(

    value => assert_equals(value, "ORB-style network error")),

    "ORB: Expect error response from <script> fetch.");

promise_test(t => probe_fetch().then(

    value => assert_equals(value, "ORB-style network error")),

    "ORB: Expect error response from fetch().");

</script>