1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/client-hints/accept-ch-stickiness/resources/do-not-expect-received.py b/testing/web-platform/tests/client-hints/accept-ch-stickiness/resources/do-not-expect-received.py
new file mode 100644
index 0000000000..48ebc21d14
--- /dev/null
+++ b/testing/web-platform/tests/client-hints/accept-ch-stickiness/resources/do-not-expect-received.py
@@ -0,0 +1,20 @@
+def main(request, response):
+    """
+    Check that headers sent to navigate here *do not* contain the device-memory client
+    hint, and report success/failure in a way compatible with
+    verify_{subresource|iframe}_state() in accept-ch-test.js
+    """
+
+    if b"device-memory" in request.headers or b"sec-ch-device-memory" in request.headers:
+      result = u"FAIL"
+    else:
+      result = u"PASS"
+
+    content = u'''
+<script>
+  let messagee = window.opener || window.parent;
+  messagee.postMessage("%s" , "*");
+</script>
+''' % (result)
+    headers = [(b"Content-Type", b"text/html"), (b"Access-Control-Allow-Origin", b"*")]
+    return 200, headers, content