File: test_duplicate_modulepreload_bad_uri.html

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<!DOCTYPE html>
<meta charset=utf-8>
<title>Test duplicate bad URI import doesn't crash</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="modulepreload" href="./bug_2009204_module_a.mjs" />
<link rel="modulepreload" href="./bug_2009204_module_b.mjs" />

<script>
  SimpleTest.waitForExplicitFinish();

  // The test passes if we reach here without crashing due to an assertion
  // failure in PreloaderBase::NotifyOpen. The bug was that when two modules
  // are both modulepreloaded and they both import the same bad URI (node:async_hooks),
  // both preloads start simultaneously and both try to load the dependency.
  // The first load would fail with NS_ERROR_DOM_BAD_URI after registering the
  // preload, then the second load would try to register the preload again,
  // hitting an assertion.

  window.addEventListener("load", () => {
    ok(true, "Page loaded without assertion failure");
    SimpleTest.finish();
  });
</script>

<body>
  Test for Bug 2009204 - duplicate bad URI import should not crash
</body>