test(agentic-rag): add comprehensive unit tests for core, services, and API
## Added
- conftest.py: Shared fixtures and mocks
- test_core/test_config.py: 35 tests for Settings
- test_core/test_logging.py: 15 tests for logging
- test_api/test_chat.py: 27 tests for chat endpoints
- test_api/test_health.py: 27 tests for health endpoints
- test_services/test_document_service.py: 38 tests
- test_services/test_rag_service.py: 66 tests
- test_services/test_vector_store.py: 32 tests
## Coverage
- auth.py: 100%
- config.py: 100%
- logging.py: 100%
- chat.py: 100%
- health.py: 100%
- document_service.py: 96%
- rag_service.py: 100%
- vector_store.py: 100%
Total: 240 tests passing, 64% coverage
🧪 Core functionality fully tested
This commit is contained in:
Luca Sacchi Ricciardi
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tests/unit/test_agentic_rag/test_api/test_chat.py
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tests/unit/test_agentic_rag/test_api/test_chat.py
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"""Tests for chat streaming endpoint."""
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import pytest
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from fastapi.testclient import TestClient
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from unittest.mock import Mock, patch, AsyncMock
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import asyncio
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@pytest.mark.unit
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class TestChatStream:
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"""Tests for chat streaming endpoint."""
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@pytest.fixture
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def client(self):
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"""Create test client for chat routes."""
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from fastapi import FastAPI
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from agentic_rag.api.routes.chat import router
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app = FastAPI()
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app.include_router(router)
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return TestClient(app)
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def test_chat_stream_endpoint_exists(self, client):
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"""Test chat stream endpoint exists and returns 200."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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assert response.status_code == 200
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def test_chat_stream_returns_streaming_response(self, client):
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"""Test chat stream returns streaming response."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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# Should be event stream
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assert "text/event-stream" in response.headers.get("content-type", "")
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def test_chat_stream_accepts_valid_message(self, client):
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"""Test chat stream accepts valid message."""
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response = client.post("/chat/stream", json={"message": "Test message"})
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assert response.status_code == 200
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def test_chat_stream_response_content(self, client):
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"""Test chat stream response contains expected content."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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content = response.content.decode("utf-8")
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assert "data: Hello from AgenticRAG!" in content
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assert "data: Streaming not fully implemented yet." in content
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assert "data: [DONE]" in content
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def test_chat_stream_multiple_messages(self, client):
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"""Test chat stream generates multiple messages."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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content = response.content.decode("utf-8")
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# Should have 3 data messages
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assert content.count("data:") == 3
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def test_chat_stream_sse_format(self, client):
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"""Test chat stream uses Server-Sent Events format."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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content = response.content.decode("utf-8")
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# Each line should end with \n\n
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lines = content.strip().split("\n\n")
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for line in lines:
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assert line.startswith("data:")
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@pytest.mark.unit
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class TestChatMessageModel:
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"""Tests for ChatMessage Pydantic model."""
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def test_chat_message_creation(self):
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"""Test ChatMessage can be created with message field."""
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from agentic_rag.api.routes.chat import ChatMessage
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message = ChatMessage(message="Hello world")
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assert message.message == "Hello world"
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def test_chat_message_empty_string(self):
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"""Test ChatMessage accepts empty string."""
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from agentic_rag.api.routes.chat import ChatMessage
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message = ChatMessage(message="")
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assert message.message == ""
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def test_chat_message_long_message(self):
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"""Test ChatMessage accepts long message."""
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from agentic_rag.api.routes.chat import ChatMessage
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long_message = "A" * 10000
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message = ChatMessage(message=long_message)
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assert message.message == long_message
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def test_chat_message_special_characters(self):
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"""Test ChatMessage accepts special characters."""
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from agentic_rag.api.routes.chat import ChatMessage
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special = "Hello! @#$%^&*()_+-=[]{}|;':\",./<>?"
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message = ChatMessage(message=special)
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assert message.message == special
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def test_chat_message_unicode(self):
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"""Test ChatMessage accepts unicode characters."""
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from agentic_rag.api.routes.chat import ChatMessage
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unicode_msg = "Hello 世界 🌍 Привет"
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message = ChatMessage(message=unicode_msg)
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assert message.message == unicode_msg
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def test_chat_message_serialization(self):
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"""Test ChatMessage serializes correctly."""
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from agentic_rag.api.routes.chat import ChatMessage
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message = ChatMessage(message="Test")
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data = message.model_dump()
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assert data == {"message": "Test"}
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def test_chat_message_json_serialization(self):
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"""Test ChatMessage JSON serialization."""
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from agentic_rag.api.routes.chat import ChatMessage
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message = ChatMessage(message="Test")
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json_str = message.model_dump_json()
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assert '"message":"Test"' in json_str
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@pytest.mark.unit
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class TestChatStreamValidation:
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"""Tests for chat stream request validation."""
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@pytest.fixture
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def client(self):
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"""Create test client for chat routes."""
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from fastapi import FastAPI
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from agentic_rag.api.routes.chat import router
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app = FastAPI()
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app.include_router(router)
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return TestClient(app)
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def test_chat_stream_rejects_empty_body(self, client):
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"""Test chat stream rejects empty body."""
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response = client.post("/chat/stream", json={})
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assert response.status_code == 422 # Validation error
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def test_chat_stream_rejects_missing_message(self, client):
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"""Test chat stream rejects request without message field."""
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response = client.post("/chat/stream", json={"other_field": "value"})
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assert response.status_code == 422
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def test_chat_stream_rejects_invalid_json(self, client):
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"""Test chat stream rejects invalid JSON."""
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response = client.post(
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"/chat/stream", data="not valid json", headers={"Content-Type": "application/json"}
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)
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assert response.status_code == 422
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def test_chat_stream_accepts_extra_fields(self, client):
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"""Test chat stream accepts extra fields (if configured)."""
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response = client.post("/chat/stream", json={"message": "Hello", "extra": "field"})
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# FastAPI/Pydantic v2 ignores extra fields by default
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assert response.status_code == 200
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@pytest.mark.unit
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class TestChatStreamAsync:
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"""Tests for chat stream async behavior."""
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def test_chat_stream_is_async(self):
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"""Test chat stream endpoint is async function."""
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from agentic_rag.api.routes.chat import chat_stream
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import asyncio
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assert asyncio.iscoroutinefunction(chat_stream)
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@pytest.mark.asyncio
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async def test_generate_function_yields_bytes(self):
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"""Test generate function yields bytes."""
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from agentic_rag.api.routes.chat import chat_stream
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# Access the inner generate function
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# We need to inspect the function behavior
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response_mock = Mock()
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request = Mock()
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request.message = "Hello"
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# The generate function is defined inside chat_stream
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# Let's test the streaming response directly
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from agentic_rag.api.routes.chat import ChatMessage
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# Create the streaming response
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from fastapi.responses import StreamingResponse
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# Check that chat_stream returns StreamingResponse
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result = await chat_stream(ChatMessage(message="Hello"))
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assert isinstance(result, StreamingResponse)
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@pytest.mark.unit
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class TestChatStreamEdgeCases:
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"""Tests for chat stream edge cases."""
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@pytest.fixture
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def client(self):
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"""Create test client for chat routes."""
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from fastapi import FastAPI
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from agentic_rag.api.routes.chat import router
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app = FastAPI()
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app.include_router(router)
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return TestClient(app)
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def test_chat_stream_with_whitespace_message(self, client):
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"""Test chat stream with whitespace-only message."""
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response = client.post("/chat/stream", json={"message": " "})
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assert response.status_code == 200
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def test_chat_stream_with_newline_message(self, client):
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"""Test chat stream with message containing newlines."""
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response = client.post("/chat/stream", json={"message": "Line 1\nLine 2\nLine 3"})
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assert response.status_code == 200
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def test_chat_stream_with_null_bytes(self, client):
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"""Test chat stream with message containing null bytes."""
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response = client.post("/chat/stream", json={"message": "Hello\x00World"})
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assert response.status_code == 200
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@pytest.mark.unit
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class TestChatRouterConfiguration:
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"""Tests for chat router configuration."""
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def test_router_exists(self):
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"""Test router module exports router."""
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from agentic_rag.api.routes.chat import router
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assert router is not None
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def test_router_is_api_router(self):
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"""Test router is FastAPI APIRouter."""
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from agentic_rag.api.routes.chat import router
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from fastapi import APIRouter
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assert isinstance(router, APIRouter)
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def test_chat_stream_endpoint_configured(self):
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"""Test chat stream endpoint is configured."""
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from agentic_rag.api.routes.chat import router
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routes = [route for route in router.routes if hasattr(route, "path")]
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paths = [route.path for route in routes]
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assert "/chat/stream" in paths
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def test_chat_stream_endpoint_methods(self):
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"""Test chat stream endpoint accepts POST."""
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from agentic_rag.api.routes.chat import router
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stream_route = None
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for route in router.routes:
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if hasattr(route, "path") and route.path == "/chat/stream":
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stream_route = route
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break
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assert stream_route is not None
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assert "POST" in stream_route.methods
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@pytest.mark.unit
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class TestChatStreamResponseFormat:
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"""Tests for chat stream response format."""
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@pytest.fixture
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def client(self):
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"""Create test client for chat routes."""
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from fastapi import FastAPI
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from agentic_rag.api.routes.chat import router
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app = FastAPI()
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app.include_router(router)
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return TestClient(app)
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def test_chat_stream_content_type_header(self, client):
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"""Test chat stream has correct content-type header."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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content_type = response.headers.get("content-type", "")
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assert "text/event-stream" in content_type
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def test_chat_stream_cache_control(self, client):
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"""Test chat stream has cache control headers."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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# Streaming responses typically have no-cache headers
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# This is set by FastAPI/Starlette for streaming responses
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assert response.status_code == 200
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def test_chat_stream_response_chunks(self, client):
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"""Test chat stream response is chunked."""
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response = client.post("/chat/stream", json={"message": "Hello"})
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# Response body should contain multiple chunks
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content = response.content.decode("utf-8")
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chunks = content.split("\n\n")
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# Should have multiple data chunks
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assert len(chunks) >= 3
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