Refactor message parameter in Anthropic provider

tests/test_generate_data.py

@@ -0,0 +1,28 @@
+import pytest
+
+from simplemind.providers import Anthropic, Gemini, OpenAI, Groq, Ollama
+from pydantic import BaseModel
+
+
+class ResponseModel(BaseModel):
+    result: int
+
+
+@pytest.mark.parametrize(
+    "provider_cls",
+    [
+        Anthropic,
+        Gemini,
+        OpenAI,
+        Groq,
+        Ollama,
+    ],
+)
+def test_generate_data(provider_cls):
+    provider = provider_cls()
+    prompt = "What is 2+2?"
+
+    data = provider.structured_response(prompt=prompt, response_model=ResponseModel)
+
+    assert isinstance(data, ResponseModel)
+    assert type(data.result) == int