1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/navigation-timing/resources/respond-slowly.py b/testing/web-platform/tests/navigation-timing/resources/respond-slowly.py
new file mode 100644
index 0000000000..e58e16f1f0
--- /dev/null
+++ b/testing/web-platform/tests/navigation-timing/resources/respond-slowly.py
@@ -0,0 +1,29 @@
+import time
+
+
+def main(request, response):
+    head = b"""<script>
+    let navigationTiming = performance.getEntriesByType('navigation')[0];
+    let originalResponseEnd = navigationTiming.responseEnd;
+    let originalDuration = navigationTiming.duration;
+    function checkResponseEnd() {
+        let responseEndDuringLoadEvent = navigationTiming.responseEnd;
+        let durationDuringLoadEvent = navigationTiming.duration;
+        setTimeout(function() {
+            parent.postMessage([
+                originalResponseEnd,
+                originalDuration,
+                responseEndDuringLoadEvent,
+                durationDuringLoadEvent,
+                navigationTiming.responseEnd,
+                navigationTiming.duration], '*');
+        }, 0);
+    }
+    </script><body onload='checkResponseEnd()'>"""
+    response.headers.set(b"Content-Length", str(len(head) + 1000))
+    response.headers.set(b"Content-Type", b"text/html")
+    response.write_status_headers()
+    response.writer.write_content(head)
+    for i in range(100):
+        response.writer.write_content(b"1234567890")
+        time.sleep(0.01)