chore: fix UT failures of test_google_llm.py

Mainly it's due to GenAI sdk changed their header of genai SDK versions, we have UT to verify that ADK or ADK users won't override their headers. Updated the header accordingly in the UT.

PiperOrigin-RevId: 786334741

tests/unittests/models/test_google_llm.py

@@ -108,20 +108,32 @@ def test_supported_models():
 def test_client_version_header():
   model = Gemini(model="gemini-1.5-flash")
   client = model.api_client
-  adk_header = (
-      f"google-adk/{adk_version.__version__} gl-python/{sys.version.split()[0]}"
-  )
-  genai_header = (
-      f"google-genai-sdk/{genai_version.__version__} gl-python/{sys.version.split()[0]} "
-  )
-  expected_header = genai_header + adk_header
 
-  assert (
-      expected_header
-      in client._api_client._http_options.headers["x-goog-api-client"]
+  # Check that ADK version and Python version are present in headers
+  adk_version_string = f"google-adk/{adk_version.__version__}"
+  python_version_string = f"gl-python/{sys.version.split()[0]}"
+
+  x_goog_api_client_header = client._api_client._http_options.headers[
+      "x-goog-api-client"
+  ]
+  user_agent_header = client._api_client._http_options.headers["user-agent"]
+
+  # Verify ADK version is present
+  assert adk_version_string in x_goog_api_client_header
+  assert adk_version_string in user_agent_header
+
+  # Verify Python version is present
+  assert python_version_string in x_goog_api_client_header
+  assert python_version_string in user_agent_header
+
+  # Verify some Google SDK version is present (could be genai-sdk or vertex-genai-modules)
+  assert any(
+      sdk in x_goog_api_client_header
+      for sdk in ["google-genai-sdk/", "vertex-genai-modules/"]
   )
-  assert (
-      expected_header in client._api_client._http_options.headers["user-agent"]
+  assert any(
+      sdk in user_agent_header
+      for sdk in ["google-genai-sdk/", "vertex-genai-modules/"]
   )
 
 
@@ -129,23 +141,34 @@ def test_client_version_header_with_agent_engine(mock_os_environ):
   os.environ[_AGENT_ENGINE_TELEMETRY_ENV_VARIABLE_NAME] = "my_test_project"
   model = Gemini(model="gemini-1.5-flash")
   client = model.api_client
-  adk_header_base = f"google-adk/{adk_version.__version__}"
-  adk_header_with_telemetry = (
-      f"{adk_header_base}+{_AGENT_ENGINE_TELEMETRY_TAG}"
-      f" gl-python/{sys.version.split()[0]}"
-  )
-  genai_header = (
-      f"google-genai-sdk/{genai_version.__version__} "
-      f"gl-python/{sys.version.split()[0]} "
-  )
-  expected_header = genai_header + adk_header_with_telemetry
 
-  assert (
-      expected_header
-      in client._api_client._http_options.headers["x-goog-api-client"]
+  # Check that ADK version with telemetry tag and Python version are present in headers
+  adk_version_with_telemetry = (
+      f"google-adk/{adk_version.__version__}+{_AGENT_ENGINE_TELEMETRY_TAG}"
   )
-  assert (
-      expected_header in client._api_client._http_options.headers["user-agent"]
+  python_version_string = f"gl-python/{sys.version.split()[0]}"
+
+  x_goog_api_client_header = client._api_client._http_options.headers[
+      "x-goog-api-client"
+  ]
+  user_agent_header = client._api_client._http_options.headers["user-agent"]
+
+  # Verify ADK version with telemetry tag is present
+  assert adk_version_with_telemetry in x_goog_api_client_header
+  assert adk_version_with_telemetry in user_agent_header
+
+  # Verify Python version is present
+  assert python_version_string in x_goog_api_client_header
+  assert python_version_string in user_agent_header
+
+  # Verify some Google SDK version is present (could be genai-sdk or vertex-genai-modules)
+  assert any(
+      sdk in x_goog_api_client_header
+      for sdk in ["google-genai-sdk/", "vertex-genai-modules/"]
+  )
+  assert any(
+      sdk in user_agent_header
+      for sdk in ["google-genai-sdk/", "vertex-genai-modules/"]
   )