refactor: consolidate to handler-base, migrate to pyproject.toml, add tests

tests/conftest.py

@@ -0,0 +1,81 @@
+"""
+Pytest configuration and fixtures for chat-handler tests.
+"""
+import asyncio
+import os
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+# Set test environment variables before importing
+os.environ.setdefault("NATS_URL", "nats://localhost:4222")
+os.environ.setdefault("REDIS_URL", "redis://localhost:6379")
+os.environ.setdefault("MILVUS_HOST", "localhost")
+os.environ.setdefault("OTEL_ENABLED", "false")
+os.environ.setdefault("MLFLOW_ENABLED", "false")
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    """Create event loop for async tests."""
+    loop = asyncio.new_event_loop()
+    yield loop
+    loop.close()
+
+
+@pytest.fixture
+def sample_embedding():
+    """Sample embedding vector."""
+    return [0.1] * 1024
+
+
+@pytest.fixture
+def sample_documents():
+    """Sample search results."""
+    return [
+        {"text": "Machine learning is a subset of AI.", "score": 0.95},
+        {"text": "Deep learning uses neural networks.", "score": 0.90},
+        {"text": "AI enables intelligent automation.", "score": 0.85},
+    ]
+
+
+@pytest.fixture
+def sample_reranked():
+    """Sample reranked results."""
+    return [
+        {"document": "Machine learning is a subset of AI.", "score": 0.98},
+        {"document": "Deep learning uses neural networks.", "score": 0.85},
+    ]
+
+
+@pytest.fixture
+def mock_nats_message():
+    """Create a mock NATS message."""
+    msg = MagicMock()
+    msg.subject = "ai.chat.request"
+    msg.reply = "ai.chat.response.test-123"
+    return msg
+
+
+@pytest.fixture
+def mock_chat_request():
+    """Sample chat request payload."""
+    return {
+        "request_id": "test-request-123",
+        "query": "What is machine learning?",
+        "collection": "test_collection",
+        "enable_tts": False,
+        "system_prompt": None,
+    }
+
+
+@pytest.fixture
+def mock_chat_request_with_tts():
+    """Sample chat request with TTS enabled."""
+    return {
+        "request_id": "test-request-456",
+        "query": "Tell me about AI",
+        "collection": "documents",
+        "enable_tts": True,
+        "system_prompt": "You are a helpful assistant.",
+    }