fix(gemin): Implement _verify_and_set_api_key.

src/any_llm/providers/gemini/gemini.py

@@ -15,12 +15,16 @@ class GeminiProvider(GoogleProvider):
     PROVIDER_DOCUMENTATION_URL = "https://ai.google.dev/gemini-api/docs"
     ENV_API_KEY_NAME = "GEMINI_API_KEY/GOOGLE_API_KEY"
 
-    def _get_client(self, config: ClientConfig) -> "genai.Client":
-        """Get Gemini API client."""
-        api_key = getattr(config, "api_key", None) or os.getenv("GEMINI_API_KEY") or os.getenv("GOOGLE_API_KEY")
+    def _verify_and_set_api_key(self, config: ClientConfig) -> ClientConfig:
+        # Standardized API key handling. Splitting into its own function so that providers
+        # Can easily override this method if they don't want verification (for instance, LMStudio)
+        if not config.api_key:
+            config.api_key = os.getenv("GEMINI_API_KEY") or os.getenv("GOOGLE_API_KEY")
 
-        if not api_key:
-            msg = "Google Gemini Developer API"
-            raise MissingApiKeyError(msg, "GEMINI_API_KEY/GOOGLE_API_KEY")
+        if not config.api_key:
+            raise MissingApiKeyError(self.PROVIDER_NAME, self.ENV_API_KEY_NAME)
+        return config
 
-        return genai.Client(api_key=api_key, **(config.client_args if config.client_args else {}))
+    def _get_client(self, config: ClientConfig) -> "genai.Client":
+        """Get Gemini API client."""
+        return genai.Client(api_key=config.api_key, **(config.client_args if config.client_args else {}))

tests/unit/providers/test_google_provider.py

@@ -47,6 +47,21 @@ def mock_google_provider():  # type: ignore[no-untyped-def]
         yield mock_genai
 
 
+@pytest.mark.parametrize("env_var", ["GEMINI_API_KEY", "GOOGLE_API_KEY"])
+def test_gemini_initialization_with_env_var_api_key(env_var: str) -> None:
+    """Test that the provider initializes correctly with API key from environment variable."""
+    with patch.dict("os.environ", {env_var: "env-api-key"}, clear=True):
+        provider = GeminiProvider(ClientConfig())
+        assert provider.config.api_key == "env-api-key"
+
+
+def test_vertexai_initialization_with_env_var_api_key() -> None:
+    """Test that the VertexaiProvider initializes correctly with GOOGLE_PROJECT_ID from environment variable."""
+    with patch.dict("os.environ", {"GOOGLE_PROJECT_ID": "env-project-id"}, clear=True):
+        provider = VertexaiProvider(ClientConfig())
+        assert provider.config.api_key == "env-project-id"
+
+
 @pytest.mark.asyncio
 async def test_completion_with_system_instruction(google_provider_class: type[Provider]) -> None:
     """Test that completion works correctly with system_instruction."""