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| """Contract tests for chat API endpoint. | |
| [Task]: T012 | |
| [From]: specs/004-ai-chatbot/tasks.md | |
| These tests verify the API contract for POST /api/{user_id}/chat | |
| ensuring request/response schemas match the specification. | |
| """ | |
| import pytest | |
| from uuid import uuid4 | |
| from datetime import datetime | |
| from typing import Any, Dict | |
| from httpx import AsyncClient | |
| from fastapi import FastAPI | |
| from sqlalchemy.ext.asyncio import AsyncSession | |
| from models.message import Message | |
| from models.conversation import Conversation | |
| class TestChatAPIContract: | |
| """Test suite for chat API endpoint contract compliance.""" | |
| async def test_chat_endpoint_accepts_valid_message( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint accepts properly formatted message. | |
| [From]: specs/004-ai-chatbot/plan.md - API Contract | |
| Request body: | |
| { | |
| "message": "Create a task to buy groceries", | |
| "conversation_id": "optional-uuid" | |
| } | |
| Expected: 200 OK with AI response | |
| """ | |
| payload = { | |
| "message": "Create a task to buy groceries" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertions | |
| # assert response.status_code == 200 | |
| # data = response.json() | |
| # assert "response" in data | |
| # assert "conversation_id" in data | |
| # assert isinstance(data["response"], str) | |
| # Placeholder assertion | |
| assert payload["message"] == "Create a task to buy groceries" | |
| async def test_chat_endpoint_rejects_empty_message( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint rejects empty messages. | |
| [From]: specs/004-ai-chatbot/spec.md - FR-042 | |
| Empty messages should return 400 Bad Request. | |
| """ | |
| payload = { | |
| "message": "" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertion | |
| # assert response.status_code == 400 | |
| # assert "message" in response.json()["detail"] | |
| # Placeholder assertion | |
| with pytest.raises(ValueError): | |
| if not payload["message"]: | |
| raise ValueError("Message cannot be empty") | |
| async def test_chat_endpoint_rejects_oversized_message( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint rejects messages exceeding 10,000 characters. | |
| [From]: specs/004-ai-chatbot/spec.md - FR-042 | |
| """ | |
| # Create message exceeding 10,000 characters | |
| oversized_message = "a" * 10001 | |
| payload = { | |
| "message": oversized_message | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertion | |
| # assert response.status_code == 400 | |
| # assert "exceeds maximum length" in response.json()["detail"] | |
| # Placeholder assertion | |
| assert len(oversized_message) > 10000 | |
| async def test_chat_endpoint_creates_new_conversation_when_not_provided( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint creates new conversation when conversation_id omitted. | |
| [From]: specs/004-ai-chatbot/plan.md - Conversation Management | |
| Request body without conversation_id should create new conversation. | |
| """ | |
| payload = { | |
| "message": "Start a new conversation" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertions | |
| # assert response.status_code == 200 | |
| # data = response.json() | |
| # assert "conversation_id" in data | |
| # assert data["conversation_id"] is not None | |
| # Verify new conversation created in database | |
| async def test_chat_endpoint_reuses_existing_conversation( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4, | |
| async_session: AsyncSession | |
| ): | |
| """Test that chat endpoint reuses conversation when conversation_id provided. | |
| [From]: specs/004-ai-chatbot/plan.md - Conversation Management | |
| """ | |
| # Create existing conversation | |
| conversation = Conversation( | |
| id=uuid4(), | |
| user_id=test_user_id, | |
| created_at=datetime.utcnow(), | |
| updated_at=datetime.utcnow() | |
| ) | |
| async_session.add(conversation) | |
| await async_session.commit() | |
| payload = { | |
| "message": "Continue this conversation", | |
| "conversation_id": str(conversation.id) | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertions | |
| # assert response.status_code == 200 | |
| # Verify no new conversation created | |
| # Verify message added to existing conversation | |
| async def test_chat_endpoint_returns_task_creation_confirmation( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint returns structured confirmation for task creation. | |
| [From]: specs/004-ai-chatbot/spec.md - US1-AC1 | |
| Response should include: | |
| - AI text response | |
| - Created task details (if applicable) | |
| - Conversation ID | |
| """ | |
| payload = { | |
| "message": "Create a task to buy groceries" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertions | |
| # assert response.status_code == 200 | |
| # data = response.json() | |
| # assert "response" in data | |
| # assert "conversation_id" in data | |
| # assert "tasks" in data # Array of created/modified tasks | |
| # assert isinstance(data["tasks"], list) | |
| async def test_chat_endpoint_handles_ai_service_unavailability( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint handles Gemini API unavailability gracefully. | |
| [From]: specs/004-ai-chatbot/tasks.md - T022 | |
| Should return 503 Service Unavailable with helpful error message. | |
| """ | |
| # TODO: Mock Gemini API to raise connection error | |
| payload = { | |
| "message": "Test message when AI is down" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{test_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertion | |
| # assert response.status_code == 503 | |
| # assert "AI service" in response.json()["detail"] | |
| async def test_chat_endpoint_enforces_rate_limiting( | |
| self, | |
| async_client: AsyncClient, | |
| test_user_id: uuid4 | |
| ): | |
| """Test that chat endpoint enforces 100 messages/day limit. | |
| [From]: specs/004-ai-chatbot/spec.md - NFR-011 | |
| Should return 429 Too Many Requests after limit exceeded. | |
| """ | |
| # TODO: Test rate limiting implementation | |
| # 1. Send 100 messages successfully | |
| # 2. 101st message should return 429 | |
| # Placeholder assertion | |
| rate_limit = 100 | |
| assert rate_limit == 100 | |
| async def test_chat_endpoint_requires_authentication( | |
| self, | |
| async_client: AsyncClient | |
| ): | |
| """Test that chat endpoint validates user authentication. | |
| [From]: specs/004-ai-chatbot/plan.md - Security Model | |
| Invalid user_id should return 401 Unauthorized or 404 Not Found. | |
| """ | |
| invalid_user_id = uuid4() | |
| payload = { | |
| "message": "Test message" | |
| } | |
| # TODO: Uncomment when chat endpoint implemented | |
| # response = await async_client.post( | |
| # f"/api/{invalid_user_id}/chat", | |
| # json=payload | |
| # ) | |
| # Contract assertion | |
| # assert response.status_code in [401, 404] | |