Feature Testanforderungen: RAG Pipeline

Version: 1.0 | Stand: 30. Dezember 2025

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Übersicht

Dieses Dokument beschreibt alle Tests für die LLARS RAG (Retrieval-Augmented Generation) Pipeline.

Komponenten: Upload → Chunking → Embedding → Storage → Retrieval → Reranking

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1. Document Upload

API: POST /api/rag/documents/upload, POST /api/rag/documents/upload-multiple Service: DocumentService

Validierung

ID	Test	Erwartung	Art
RAG-U01	PDF Upload	Dokument erstellt	Integration
RAG-U02	TXT Upload	Dokument erstellt	Integration
RAG-U03	MD Upload	Dokument erstellt	Integration
RAG-U04	DOCX Upload	Dokument erstellt	Integration
RAG-U05	Unerlaubter Typ (.exe)	400 Bad Request	Integration
RAG-U06	Zu große Datei (>50MB)	400 Bad Request	Integration
RAG-U07	Duplicate Hash	409 Conflict	Integration
RAG-U08	Leere Datei	400 Bad Request	Integration

Multi-Upload

ID	Test	Erwartung	Art
RAG-MU01	5 Files gleichzeitig	Alle erstellt	Integration
RAG-MU02	Mix valid/invalid	Valide erstellt, Fehler für Invalid	Integration
RAG-MU03	20 Files (Limit-Test)	Alle verarbeitet	Integration

Queue-Integration

ID	Test	Erwartung	Art
RAG-Q01	Nach Upload	RAGProcessingQueue Eintrag	Integration
RAG-Q02	Priority	Default 5, konfigurierbar	Integration
RAG-Q03	Status	queued nach Upload	Integration

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2. Chunking

Service: LumberChunker

Text Splitting

ID	Test	Erwartung	Art
RAG-CH01	Standard Text	Chunks mit 1500 chars	Unit
RAG-CH02	Overlap	300 chars Überlappung	Unit
RAG-CH03	Separator Priority	Markdown Headers zuerst	Unit
RAG-CH04	Kurzer Text	Ein Chunk	Unit
RAG-CH05	Sehr langer Text	Mehrere Chunks	Unit

PDF Processing

ID	Test	Erwartung	Art
RAG-PDF01	Multi-Page PDF	Chunks mit page_number	Integration
RAG-PDF02	PDF mit Bildern	Bilder extrahiert	Integration
RAG-PDF03	Scanned PDF	OCR-Text (wenn konfiguriert)	Integration
RAG-PDF04	Korrupte PDF	Fehler abgefangen	Integration

Chunk Metadata

ID	Test	Erwartung	Art
RAG-CM01	start_char	Korrekte Position	Unit
RAG-CM02	end_char	Korrekte Position	Unit
RAG-CM03	chunk_index	Sequentiell	Unit
RAG-CM04	page_number	Bei PDFs vorhanden	Unit

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3. Embedding

Services: EmbeddingModelService, CollectionEmbeddingService

Model Selection

ID	Test	Erwartung	Art
RAG-E01	LiteLLM verfügbar	LiteLLM verwendet	Integration
RAG-E02	LiteLLM nicht verfügbar	Local Fallback	Integration
RAG-E03	Local nicht verfügbar	MiniLM Fallback	Integration
RAG-E04	Kein Model verfügbar	Fehler	Integration
RAG-E05	Model Cache (1h)	Kein neuer Check	Unit

Embedding Generation

ID	Test	Erwartung	Art
RAG-EG01	Text Embedding	1024 Dims (VDR-2B)	Integration
RAG-EG02	Fallback Embedding	384 Dims (MiniLM)	Integration
RAG-EG03	Batch Embedding	256 Chunks pro Batch	Integration
RAG-EG04	Image Embedding	Multimodal Support	Integration
RAG-EG05	Error Recovery	Retry mit Backoff	Integration

Collection Embedding

ID	Test	Erwartung	Art
RAG-CE01	Start Embedding	Status: processing	Integration
RAG-CE02	Progress Updates	0-100% via WebSocket	Integration
RAG-CE03	Complete	Status: completed	Integration
RAG-CE04	Error	Status: failed, Message	Integration
RAG-CE05	Pause Embedding	Pausiert	Integration
RAG-CE06	Resume Embedding	Fortgesetzt	Integration

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4. ChromaDB Storage

Pfad: /app/storage/vectorstore/

Collection Management

ID	Test	Erwartung	Art
RAG-S01	Collection erstellen	Chroma Collection	Integration
RAG-S02	Collection Name	llars_{name}_{model}	Integration
RAG-S03	Collection löschen	Chunks entfernt	Integration
RAG-S04	Metadata	hnsw:space=cosine	Integration

Vector Storage

ID	Test	Erwartung	Art
RAG-VS01	Upsert Chunks	Vectors gespeichert	Integration
RAG-VS02	Vector ID Format	doc_{id}chunk}_{uuid	Integration
RAG-VS03	Metadata Storage	document_id, chunk_index	Integration
RAG-VS04	Duplicate Detection	Hash-basiert	Integration

Self-Healing

ID	Test	Erwartung	Art
RAG-SH01	Chroma leer, DB hat Chunks	Backfill	Integration
RAG-SH02	Inconsistent State	Re-Index	Integration

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5. Retrieval

Service: ChatService

Semantic Search

ID	Test	Erwartung	Art
RAG-R01	Basic Query	Top-K Results	Integration
RAG-R02	Query Embedding	Same Model as Docs	Integration
RAG-R03	Cosine Similarity	Korrekte Scores	Integration
RAG-R04	Empty Query	Keine Ergebnisse	Integration
RAG-R05	Multi-Collection	Merged Results	Integration

Lexical Search

ID	Test	Erwartung	Art
RAG-LS01	Token Extraction	Stopwords gefiltert	Unit
RAG-LS02	Compound Words	Gesplittet	Unit
RAG-LS03	German Synonyms	Expanded	Unit
RAG-LS04	BM25 Scoring	Overlap Ratio	Unit

Hybrid Search

ID	Test	Erwartung	Art
RAG-HS01	Vector + Lexical	Combined Score	Integration
RAG-HS02	Alpha Parameter	Gewichtung korrekt	Unit
RAG-HS03	Fallback to Lexical	Bei Vector-Fehler	Integration

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6. Reranking

Service: Reranker Modes: off, lexical, cross-encoder

Lexical Reranking

ID	Test	Erwartung	Art
RAG-RR01	Mode: lexical	Token-Overlap	Integration
RAG-RR02	Score Formula	(1-α)vector + αoverlap	Unit
RAG-RR03	Alpha Default	0.15	Unit

Cross-Encoder

ID	Test	Erwartung	Art
RAG-CR01	Mode: cross-encoder	CE Score	Integration
RAG-CR02	Model Cache	LRU (4 max)	Unit
RAG-CR03	German Model	ELECTRA-based	Integration

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7. Access Control

Service: RAGAccessService

Document Access

ID	Test	Erwartung	Art
RAG-AC01	Owner Access	Immer erlaubt	Unit
RAG-AC02	Admin Access	Immer erlaubt	Unit
RAG-AC03	Public Document	Jeder kann sehen	Unit
RAG-AC04	Collection Permission	Cascade zu Docs	Unit
RAG-AC05	Explicit Permission	User/Role-based	Unit
RAG-AC06	No Permission	403 Forbidden	Integration

Collection Access

ID	Test	Erwartung	Art
RAG-ACC01	Owner Access	Immer erlaubt	Unit
RAG-ACC02	Public Collection	Jeder kann sehen	Unit
RAG-ACC03	Shared Collection	Explizit geteilt	Unit
RAG-ACC04	Role-based Access	Via Rolle	Unit

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8. API Endpoints

Documents

ID	Test	Erwartung	Art
API-D01	GET /api/rag/documents	Liste mit Filter	Integration
API-D02	GET /api/rag/documents/:id	Document Details	Integration
API-D03	GET /api/rag/documents/:id/content	Full Text	Integration
API-D04	GET /api/rag/documents/:id/chunks	Chunk Liste	Integration
API-D05	GET /api/rag/documents/:id/download	Original File	Integration
API-D06	PUT /api/rag/documents/:id	Update Metadata	Integration
API-D07	DELETE /api/rag/documents/:id	Soft Delete	Integration

Collections

ID	Test	Erwartung	Art
API-C01	GET /api/rag/collections	Liste	Integration
API-C02	GET /api/rag/collections/:id	Details	Integration
API-C03	POST /api/rag/collections	Create	Integration
API-C04	PUT /api/rag/collections/:id	Update	Integration
API-C05	DELETE /api/rag/collections/:id	Delete + Cascade	Integration
API-C06	POST /api/rag/collections/:id/embed	Start Embedding	Integration
API-C07	DELETE /api/rag/collections/:id/embed	Pause Embedding	Integration
API-C08	POST /api/rag/collections/:id/reindex	Requeue All	Integration

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9. Test-Code

# tests/integration/rag/test_pipeline.py
import pytest
from pathlib import Path


class TestDocumentUpload:
    """Document Upload Tests"""

    def test_RAG_U01_pdf_upload(self, authenticated_client, test_pdf):
        """PDF Upload erstellt Dokument"""
        with open(test_pdf, 'rb') as f:
            response = authenticated_client.post(
                '/api/rag/documents/upload',
                data={'file': (f, 'test.pdf')},
                content_type='multipart/form-data'
            )
        assert response.status_code == 201
        assert 'document_id' in response.json

    def test_RAG_U05_invalid_type(self, authenticated_client):
        """Unerlaubter Dateityp wird abgelehnt"""
        response = authenticated_client.post(
            '/api/rag/documents/upload',
            data={'file': (b'content', 'malware.exe')},
            content_type='multipart/form-data'
        )
        assert response.status_code == 400
        assert 'unsupported' in response.json['error'].lower()


class TestChunking:
    """Chunking Tests"""

    def test_RAG_CH01_standard_chunking(self, lumber_chunker, sample_text):
        """Standard Text wird in 1500-char Chunks geteilt"""
        chunks = lumber_chunker.chunk_text(sample_text)
        for chunk in chunks:
            assert len(chunk.text) <= 1500

    def test_RAG_CH02_overlap(self, lumber_chunker, long_text):
        """Chunks haben 300 chars Überlappung"""
        chunks = lumber_chunker.chunk_text(long_text)
        if len(chunks) > 1:
            # Prüfe Überlappung zwischen erstem und zweitem Chunk
            overlap = chunks[0].text[-300:]
            assert overlap in chunks[1].text


class TestEmbedding:
    """Embedding Tests"""

    def test_RAG_E01_litellm_embedding(self, embedding_service, sample_texts):
        """LiteLLM Embedding generiert 1024 Dimensionen"""
        embeddings = embedding_service.embed_texts(sample_texts)
        assert len(embeddings[0]) == 1024

    def test_RAG_E03_fallback(self, embedding_service_no_litellm, sample_texts):
        """Fallback zu MiniLM bei LiteLLM-Fehler"""
        embeddings = embedding_service_no_litellm.embed_texts(sample_texts)
        assert len(embeddings[0]) == 384  # MiniLM dimensions


class TestRetrieval:
    """Retrieval Tests"""

    def test_RAG_R01_basic_query(self, rag_service, indexed_collection):
        """Basic Query gibt Top-K Results"""
        results = rag_service.search(
            query="test query",
            collection_id=indexed_collection.id,
            top_k=4
        )
        assert len(results) <= 4
        assert all('score' in r for r in results)

    def test_RAG_R05_multi_collection(self, rag_service, two_collections):
        """Multi-Collection Search merged Results"""
        results = rag_service.search(
            query="test query",
            collection_ids=[c.id for c in two_collections],
            top_k=4
        )
        # Results können aus beiden Collections kommen
        collection_ids = {r['collection_id'] for r in results}
        assert len(collection_ids) >= 1


class TestAccessControl:
    """Access Control Tests"""

    def test_RAG_AC01_owner_access(self, rag_access_service, user, owned_document):
        """Owner hat immer Zugriff"""
        assert rag_access_service.can_view_document(user, owned_document) is True

    def test_RAG_AC06_no_permission(self, client, researcher_token, private_document):
        """Kein Zugriff ohne Permission"""
        response = client.get(
            f'/api/rag/documents/{private_document.id}',
            headers={'Authorization': f'Bearer {researcher_token}'}
        )
        assert response.status_code == 403

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10. Fixtures

# tests/conftest.py
import pytest
from pathlib import Path


@pytest.fixture
def test_pdf():
    """Test PDF Datei"""
    return Path(__file__).parent / 'fixtures/files/test.pdf'


@pytest.fixture
def sample_text():
    """Sample Text für Chunking"""
    return "Lorem ipsum " * 500  # ~6000 chars


@pytest.fixture
def lumber_chunker(app):
    """LumberChunker Instance"""
    from app.services.rag.lumber_chunker import LumberChunker
    return LumberChunker(chunk_size=1500, chunk_overlap=300)


@pytest.fixture
def embedding_service(app):
    """EmbeddingModelService Instance"""
    from app.services.rag.embedding_model_service import EmbeddingModelService
    return EmbeddingModelService()


@pytest.fixture
def indexed_collection(db, test_documents):
    """Collection mit indexierten Dokumenten"""
    from app.db.models import RAGCollection
    collection = RAGCollection(
        name='test_collection',
        embedding_model='test-model',
        total_chunks=10
    )
    db.session.add(collection)
    db.session.commit()
    return collection

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11. E2E Test-Code

// e2e/rag/rag-pipeline.spec.ts
import { test, expect } from '../fixtures/auth'

test.describe('RAG Pipeline', () => {
  test('complete upload to retrieval flow', async ({ adminPage }) => {
    // 1. Upload
    await adminPage.goto('/admin?tab=rag')
    await adminPage.setInputFiles('input[type="file"]', 'e2e/fixtures/test.pdf')
    await expect(adminPage.locator('.upload-success')).toBeVisible({ timeout: 30000 })

    // 2. Wait for Embedding
    await expect(adminPage.locator('.embedding-status:has-text("completed")')).toBeVisible({
      timeout: 120000
    })

    // 3. Test in Chat
    await adminPage.goto('/chat')
    await adminPage.click('.chatbot-item >> nth=0')
    await adminPage.fill('.message-input', 'What is in the document?')
    await adminPage.click('button:has-text("Senden")')

    // 4. Check Sources
    await expect(adminPage.locator('.sources-panel .source-chunk')).toBeVisible({
      timeout: 30000
    })
  })
})

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12. Checkliste für manuelle Tests

Upload

• PDF hochladen funktioniert
• TXT/MD/DOCX hochladen funktioniert
• Ungültige Dateien werden abgelehnt
• Duplikate werden erkannt
• Multi-Upload funktioniert

Embedding

• Embedding startet automatisch
• Progress wird angezeigt
• Status wechselt zu "completed"
• Fehler werden angezeigt

Retrieval

• Chat findet relevante Chunks
• Sources werden angezeigt
• Multi-Collection funktioniert

Access Control

• Nur erlaubte Dokumente sichtbar
• Sharing funktioniert
• Admin sieht alles

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13. Umgebungsvariablen

Variable	Default	Beschreibung
LITELLM_API_KEY	-	LiteLLM API Key
LITELLM_BASE_URL	-	LiteLLM Base URL
HF_HOME	-	HuggingFace Cache
RAG_RERANK_MODE	lexical	off/lexical/cross-encoder
RAG_RERANK_ALPHA	0.15	Lexical Weight
LEXICAL_INDEX_PATH	-	FTS Index Path

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Letzte Aktualisierung: 30. Dezember 2025