chromium/src/third_party/blink/web_tests/http/tests/inspector-protocol/network/same-site-issue-warn-cookie-lax-subresource-context-downgrade.js

(async function(testRunner) {
  const {page, session, dp} = await testRunner.startBlank(
      `Verifies that a subresource accessing a SameSite=Lax cookie across schemes triggers a context downgrade inspector issue.\n`);

  await dp.Network.enable();
  await dp.Audits.enable();

  await session.navigate('http://cookie.test:8000/inspector-protocol/resources/empty.html');

  const setCookieUrl = 'https://cookie.test:8443/inspector-protocol/network/resources/set-cookie.php?cookie='
      + encodeURIComponent('name=value; SameSite=Lax');
  await session.evaluate(`fetch('${setCookieUrl}', {method: 'POST', credentials: 'include'})`);
  const issue = await dp.Audits.onceIssueAdded();
  testRunner.log(issue.params, 'Inspector issue:');

  testRunner.completeTest();
});