Add provider tests

tests/providers/test_centml_provider.py

@@ -0,0 +1,55 @@
+import os
+import pytest
+
+from unittest.mock import patch, MagicMock
+
+from aisuite.providers.centml_provider import CentmlProvider
+
+
+@pytest.fixture(autouse=True)
+def set_api_key_env_var(monkeypatch):
+    """Fixture to set environment variables for tests."""
+    monkeypatch.setenv("CENTML_API_KEY", "test-api-key")
+
+
+def test_centml_provider():
+    """High-level test that the provider is initialized and chat completions are requested successfully."""
+
+    user_greeting = "Hello!"
+    message_history = [{"role": "user", "content": user_greeting}]
+    selected_model = "our-favorite-model"
+    chosen_temperature = 0.75
+    response_text_content = "mocked-text-response-from-model"
+
+    headers = {
+        "Authorization": f"Bearer {os.getenv('CENTML_API_KEY')}",
+        "Content-Type": "application/json",
+    }
+
+    provider = CentmlProvider()
+
+    # Create a dictionary that matches the expected JSON response structure
+    mock_json_response = {"choices": [{"message": {"content": response_text_content}}]}
+
+    with patch(
+        "httpx.post",
+        return_value=MagicMock(status_code=200, json=lambda: mock_json_response),
+    ) as mock_post:
+        response = provider.chat_completions_create(
+            messages=message_history,
+            model=selected_model,
+            temperature=chosen_temperature,
+        )
+
+        mock_post.assert_called_once_with(
+            provider.BASE_URL,
+            json={
+                "model": selected_model,
+                "messages": message_history,
+                "temperature": chosen_temperature,
+            },
+            timeout=30,
+            headers=headers,
+        )
+
+        assert response.choices[0].message.content == response_text_content