From 372e01b09997e8148a2f7c3ce2a7c8f5d49b136c Mon Sep 17 00:00:00 2001
From: Pierre Gronlier <pierre@gronlier.fr>
Date: Wed, 26 Jun 2024 01:15:18 +0200
Subject: [PATCH] accept to overwrite sent headers when using TestClient

---
 blacksheep/testing/helpers.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/blacksheep/testing/helpers.py b/blacksheep/testing/helpers.py
index 7170d808..366e99c7 100644
--- a/blacksheep/testing/helpers.py
+++ b/blacksheep/testing/helpers.py
@@ -106,10 +106,13 @@ def get_example_scope(
             (b"connection", b"keep-alive"),
             (b"upgrade-insecure-requests", b"1"),
         ]
-        + ([tuple(header) for header in extra_headers] if extra_headers else [])
         + cookies_headers
     )
 
+    headers = dict(headers) # convert sequence of tuple into dict
+    headers.update(dict(extra_headers) if extra_headers else {}) # overwrite previously defined header if any
+    headers = list(headers.items()) # convert dict to sequence of tuple
+
     return {
         "type": scheme,
         "http_version": "1.1",