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adk-python/tests/unittests/tools/google_api_tool
Parham MohammadAlizadeh ed37e343f0 feat(tools): support additional headers for google api toolset #non-breaking
Merge https://github.com/google/adk-python/pull/3194

Allow Google API toolsets to accept optional per-request headers
#3105

## Testing Plan

### Unit Tests
-  Added `test_init_with_additional_headers` in `test_google_api_tool.py` to verify headers are passed to RestApiTool
-  Added `test_prepare_request_params_merges_default_headers` in `test_rest_api_tool.py` to verify custom headers are merged into requests
-  Added `test_prepare_request_params_preserves_existing_headers` in `test_rest_api_tool.py` to verify critical headers (Content-Type, User-Agent) are not overridden by additional_headers
-  Updated `test_init` and `test_get_tools` in `test_google_api_toolset.py` to verify the parameter is properly stored and passed through

### Manual Testing
Tested with Google Ads API scenario (the original use case from issue #3105):

```python
import os
from google.adk.tools.google_api_tool import GoogleApiToolset

# Create toolset with developer-token header required by Google Ads API
google_ads_toolset = GoogleApiToolset(
    client_id=os.environ["CLIENT_ID"],
    client_secret=os.environ["CLIENT_SECRET"],
    api_name="googleads",
    api_version="v21",
    additional_headers={"developer-token": os.environ["GOOGLE_ADS_DEV_TOKEN"]}
)

# Verify headers are included in API requests
tools = await google_ads_toolset.get_tools()
# Successfully made requests with the developer-token header
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/3194 from Prhmma:feature/google-api-toolset-additional-headers-3105 e10489e82bfde5cf2bfd3f1bced3e1f5cea1f8b2
PiperOrigin-RevId: 822273582
2025-10-21 14:16:37 -07:00
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