accept-ch-change.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:
- /client-hints/accept-ch-change.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<title>Accept-CH test</title>

<body>

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

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

<script src="resources/open-and-add-load-event.js"></script>

<!--

Apart from this webpage, the test opens two more html web page. One test is run

in this web page, and two in the other web pages.

-->

<script>

// This test fetches resources/accept_ch.html. The response headers to

// that webpage contains only the Accept-CH header. These preferences should be

// stored so that the next request to the same origin is sent with the

// requested client hint headers.

// Next, to verify that the origin preferences were persisted by the user

// agent, this test fetches resources/expect_client_hints_headers.html in a new

// window. Fetching of resources/expect_client_hints_headers.html verifies that

// the user agent does send the client hints in the request headers.

// After this, the same is done but with a differet Accept-CH header, to test

// that the preferences change after receiving a different header.

promise_test(async () => {

  r = await fetch("resources/echo-client-hints-received.py");

  assert_equals(r.status, 200);

  // Verify that the browser did not include client hints in the request

  // headers when fetching echo_client_hints_received.py.

  assert_false(r.headers.has("device-memory-received"), "device-memory-received");

  assert_false(r.headers.has("device-memory-deprecated-received"), "device-memory-deprecated-received");

  assert_false(r.headers.has("viewport-width-received"), "viewport-width-received");

  assert_false(r.headers.has("viewport-width-deprecated-received"), "viewport-width-deprecated-received");

  // Fetching this webpage should cause user-agent to persist client hint

  // preferences for the origin.

  await open_and_add_load_event("resources/accept-ch.html");

  // Open a new window. Verify that the user agent does attach the client hints.

  await open_and_expect_headers("resources/expect-client-hints-headers.html");

  // Use new window to overwrite client hint preferences, then verify new

  // settings have been saved

  await open_and_add_load_event("resources/accept-ch-different.html");

  // Use new window to overwrite client hint preferences, then verify new

  // settings have been saved

  await open_and_expect_headers("resources/expect-different-client-hints-headers.html");

  // Use new window to overwrite client hint preferences, then verify new

  // settings have been saved

  await open_and_add_load_event("resources/accept-ch-empty.html");

  // Use new window to overwrite client hint preferences, then verify new

  // settings have been saved

  await open_and_expect_headers("resources/expect-no-client-hints-headers.html");

  // Check that multiple headers will fill the cache.

  await open_and_add_load_event("resources/accept-ch-split.html");

  await open_and_expect_headers("resources/expect-client-hints-headers.html");

  // Check that a mix of empty and full headers drops the cache.

  await open_and_add_load_event("resources/accept-ch-mixed.html");

  await open_and_expect_headers("resources/expect-no-client-hints-headers.html");

}, "Accept-CH changes based on header");

</script>

</body>

</html>