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<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.
// First, verify the initial state to make sure that the browser does not have
// client hints preferences cached from a previous run of the test.
promise_test(t => {
return fetch("resources/echo-client-hints-received.py").then(r => {
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("viewport-width-received"), "viewport-width-received");
});
}, "Precondition: Test that the browser does not have client hints preferences cached");
function acceptChLoaded() {
// Open a new window. Verify that the user agent does attach the client hints.
open_and_add_load_event("resources/expect-client-hints-headers.html", changeCh);
}
function changeCh() {
// Use new window to overwrite client hint preferences, then verify new
// settings have been saved
open_and_add_load_event("resources/accept-ch-different.html", verifyChangeCh);
}
function verifyChangeCh() {
// Use new window to overwrite client hint preferences, then verify new
// settings have been saved
open_and_add_load_event("resources/expect-client-hints-headers-different.html", clearCh);
}
function clearCh() {
// Use new window to overwrite client hint preferences, then verify new
// settings have been saved
open_and_add_load_event("resources/accept-ch-empty.html", verifyClearCh);
}
function verifyClearCh() {
// Use new window to overwrite client hint preferences, then verify new
// settings have been saved
open_and_add_load_event("resources/do-not-expect-client-hints.html", null);
}
// Fetching this webpage should cause user-agent to persist client hint
// preferences for the origin.
open_and_add_load_event("resources/accept-ch.html", acceptChLoaded);
</script>
</body>
</html>
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