"""Phase 1 tests: RAG service logic.

Covers:
- ChromaDB retrieval with Qwen embeddings
- Context assembly for LLM prompt
- Strict prompt construction (answer ONLY from retrieved context)
- Metadata handling per chunk
"""
import pytest


class TestRAGService:
    """RAG retrieval and prompt logic tests."""

    def test_retrieve_relevant_chunks(self):
        """Should retrieve semantically relevant chunks from ChromaDB."""
        pass  # TODO: implement

    def test_strict_prompt_format(self):
        """Should construct prompt forbidding external knowledge."""
        pass  # TODO: implement

    def test_chunk_metadata_preserved(self):
        """Should preserve filename, upload_date, content_summary per chunk."""
        pass  # TODO: implement