v8-code-cache.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/scripting-1/the-script-element/module/dynamic-import/v8-code-cache.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

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

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

<body>

<script>

// Regression test for https://crbug.com/1244145:

// This test loads a same script file (`resources/v8-code-cache.js`)

// multiple times to trigger V8 Code Cache.

// Host defined options (including base URLs and nonces) are lost when the

// script is compiled using the cached metadata, and thus causing

// dynamic import failures due to wrong base URLs and wrong nonces.

function runTest(type, nonce, description) {

  promise_test(t => {

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

      const iframe = document.createElement('iframe');

      iframe.src = 'resources/v8-code-cache-iframe.sub.html?nonce=' + nonce + '&type=' + type;

      iframe.onload = () => {

        // `window.promise` is set by `resources/v8-code-cache.js`.

        window.promise.then(resolve, reject);

};

      document.body.appendChild(iframe);

      t.add_cleanup(() => iframe.remove());

});

  }, type + ': ' + description);

// As `promise_test` are serialized, each iframe is created after previous

// iframes and scripts are completely loaded.

for (const type of ['text/javascript', 'module']) {

  // Cache the script in V8 Code Cache by running multiple times.

  runTest(type, 'abc', 'Run #1');

  runTest(type, 'abc', 'Run #2');

  runTest(type, 'abc', 'Run #3');

  runTest(type, 'abc', 'Run #4');

  // Changing the nonce seems to disable compilation cache, trigger compilation

  // using V8 Code Cache and thus expose the bug.

  runTest(type, 'def', 'Run #5');

</script>