test: add unit test for reserved keys

Author: pyrooka

test/test_base_service.py

@@ -685,6 +685,30 @@ def test_user_agent_header():
     assert response.get_result().request.headers.__getitem__(
         'user-agent') == user_agent_header['User-Agent']
 
+@responses.activate
+def test_reserved_keys(caplog):
+    service = AnyServiceV1('2021-07-02', authenticator=NoAuthAuthenticator())
+    responses.add(
+        responses.GET,
+        'https://gateway.watsonplatform.net/test/api',
+        status=200,
+        body='some text')
+    prepped = service.prepare_request('GET', url='', headers={'key': 'OK'})
+    response = service.send(
+        prepped,
+        headers={'key': 'bad'},
+        method='POST',
+        url='localhost',
+        cookies=None,
+        hooks={'response': []})
+    assert response.get_result().request.headers.__getitem__('key') == 'OK'
+    assert response.get_result().request.url == 'https://gateway.watsonplatform.net/test/api'
+    assert response.get_result().request.method == 'GET'
+    assert response.get_result().request.hooks == {'response': []}
+    assert caplog.record_tuples[0][2] == '"method" has been removed from the request'
+    assert caplog.record_tuples[1][2] == '"url" has been removed from the request'
+    assert caplog.record_tuples[2][2] == '"headers" has been removed from the request'
+    assert caplog.record_tuples[3][2] == '"cookies" has been removed from the request'
 
 def test_files_dict():
     service = AnyServiceV1('2018-11-20', authenticator=NoAuthAuthenticator())