fix: replace Python 3.10+ union syntax in integration tests

Converted 'str | bytes' and 'str | None' to Union types for compatibility
across all Python versions. Added explicit Union imports to all integration
test files to resolve runtime syntax errors in Python 3.10+ environments.

This should resolve the integration test failures in CI.

Author: jdrhyne

tests/integration/test_direct_api_integration.py

@@ -4,15 +4,17 @@
 test all Direct API methods against the live Nutrient DWS API.
 """
 
+from typing import Union
+
 import pytest
 
 from nutrient_dws import NutrientClient
 
 try:
     from . import integration_config  # type: ignore[attr-defined]
 
-    API_KEY: str | None = integration_config.API_KEY
-    BASE_URL: str | None = getattr(integration_config, "BASE_URL", None)
+    API_KEY: Union[str, None] = integration_config.API_KEY
+    BASE_URL: Union[str, None] = getattr(integration_config, "BASE_URL", None)
     TIMEOUT: int = getattr(integration_config, "TIMEOUT", 60)
 except ImportError:
     API_KEY = None

tests/integration/test_live_api.py

@@ -4,6 +4,7 @@
 """
 
 from __future__ import annotations
+from typing import Union
 
 import pytest
 
@@ -12,8 +13,8 @@
 try:
     from . import integration_config  # type: ignore[attr-defined]
 
-    API_KEY: str | None = integration_config.API_KEY
-    BASE_URL: str | None = getattr(integration_config, "BASE_URL", None)
+    API_KEY: Union[str, None] = integration_config.API_KEY
+    BASE_URL: Union[str, None] = getattr(integration_config, "BASE_URL", None)
     TIMEOUT: int = getattr(integration_config, "TIMEOUT", 60)
 except ImportError:
     API_KEY = None

tests/integration/test_new_tools_integration.py

@@ -5,6 +5,7 @@
 """
 
 from pathlib import Path
+from typing import Union
 
 import pytest
 
@@ -13,22 +14,22 @@
 try:
     from . import integration_config  # type: ignore[attr-defined]
 
-    API_KEY: str | None = integration_config.API_KEY
-    BASE_URL: str | None = getattr(integration_config, "BASE_URL", None)
+    API_KEY: Union[str, None] = integration_config.API_KEY
+    BASE_URL: Union[str, None] = getattr(integration_config, "BASE_URL", None)
     TIMEOUT: int = getattr(integration_config, "TIMEOUT", 60)
 except ImportError:
     API_KEY = None
     BASE_URL = None
     TIMEOUT = 60
 
 
-def assert_is_pdf(file_path_or_bytes: str | bytes) -> None:
+def assert_is_pdf(file_path_or_bytes: Union[str, bytes]) -> None:
     """Assert that a file or bytes is a valid PDF.
 
     Args:
         file_path_or_bytes: Path to file or bytes content to check.
     """
-    if isinstance(file_path_or_bytes, str | bytes):
+    if isinstance(file_path_or_bytes, (str, bytes)):
         if isinstance(file_path_or_bytes, str):
             with open(file_path_or_bytes, "rb") as f:
                 content = f.read(8)

tests/integration/test_watermark_image_file_integration.py

@@ -2,6 +2,7 @@
 
 import os
 from pathlib import Path
+from typing import Union
 
 import pytest
 
@@ -10,8 +11,8 @@
 try:
     from . import integration_config  # type: ignore[attr-defined]
 
-    API_KEY: str | None = integration_config.API_KEY
-    BASE_URL: str | None = getattr(integration_config, "BASE_URL", None)
+    API_KEY: Union[str, None] = integration_config.API_KEY
+    BASE_URL: Union[str, None] = getattr(integration_config, "BASE_URL", None)
     TIMEOUT: int = getattr(integration_config, "TIMEOUT", 60)
 except ImportError:
     API_KEY = None