chore: drop unrelated ci and aws test noise

Author: fede-kamel

tests/test_aws_client_unit.py

@@ -10,13 +10,27 @@
 import inspect
 import json
 import os
+import sys
+import types
 import unittest
 from unittest.mock import MagicMock, patch
 
 import httpx
 
 from cohere.manually_maintained.cohere_aws.mode import Mode
 
+if "tokenizers" not in sys.modules:
+    tokenizers_stub = types.ModuleType("tokenizers")
+    tokenizers_stub.Tokenizer = object
+    sys.modules["tokenizers"] = tokenizers_stub
+
+if "fastavro" not in sys.modules:
+    fastavro_stub = types.ModuleType("fastavro")
+    fastavro_stub.parse_schema = lambda schema: schema
+    fastavro_stub.reader = lambda *args, **kwargs: iter(())
+    fastavro_stub.writer = lambda *args, **kwargs: None
+    sys.modules["fastavro"] = fastavro_stub
+
 
 class TestSigV4HostHeader(unittest.TestCase):
     """Fix 1: The headers dict passed to AWSRequest for SigV4 signing must
@@ -47,8 +61,11 @@ def capture_aws_request(**kwargs):  # type: ignore
         mock_session.get_credentials.return_value = MagicMock()
         mock_boto3.Session.return_value = mock_session
 
-        with patch("cohere.aws_client.lazy_botocore", return_value=mock_botocore), \
-             patch("cohere.aws_client.lazy_boto3", return_value=mock_boto3):
+        import cohere.aws_client as aws_client_module
+
+        with patch.object(aws_client_module, "lazy_botocore", return_value=mock_botocore), patch.object(
+            aws_client_module, "lazy_boto3", return_value=mock_boto3
+        ):
 
             from cohere.aws_client import map_request_to_bedrock