Normalize ordering and whitespace for multi-value request headers

1 files changed, 13 insertions, 4 deletions

diff --git a/tests/unit/test_cache_keys.py b/tests/unit/test_cache_keys.py
index 3b774a6..3371d70 100644
--- a/tests/unit/test_cache_keys.py
+++ b/tests/unit/test_cache_keys.py
@@ -4,7 +4,7 @@ This just contains tests for some extra edge cases not covered elsewhere.
 import json
 
 import pytest
-from requests import PreparedRequest, Request
+from requests import Request
 
 from requests_cache.cache_keys import MAX_NORM_BODY_SIZE, create_key, normalize_request
 
@@ -119,11 +119,20 @@ def test_normalize_request__ovsersized_body():
     assert normalize_request(request, ignored_parameters=['param']).body == encoded_body
 
 
+def test_normalize_request__headers():
+    request = Request(
+        method='GET',
+        url='https://img.site.com/base/img.jpg',
+        headers={'Accept': 'gzip,  deflate,Venmo,  PayPal, '},
+    )
+    norm_request = normalize_request(request.prepare())
+    assert norm_request.headers == {'Accept': 'deflate, gzip, paypal, venmo'}
+
+
 def test_remove_ignored_headers__empty():
-    request = PreparedRequest()
-    request.prepare(
+    request = Request(
         method='GET',
         url='https://img.site.com/base/img.jpg',
         headers={'foo': 'bar'},
     )
-    assert normalize_request(request, ignored_parameters=None).headers == request.headers
+    assert normalize_request(request.prepare(), ignored_parameters=None).headers == request.headers