feat(backend): QR-Code-System (Modul 22)

QrModule mit GET /qr/:entityType/:id.svg fuer colonies (Deep-Link
direkt zu /inspections/new), apiaries, queens, honey-batches und
storage-containers. Nutzt pdfkit-Nachbar qrcode zur SVG-Erzeugung.

ApiCore-Backend/src/qr/qr.service.spec.ts

@@ -0,0 +1,50 @@
+import { BadRequestException, NotFoundException } from '@nestjs/common';
+import { QrService } from './qr.service';
+import { PrismaService } from '../prisma/prisma.service';
+
+describe('QrService', () => {
+  let service: QrService;
+  let prisma: {
+    colony: { findUnique: jest.Mock };
+    apiary: { findUnique: jest.Mock };
+    queen: { findUnique: jest.Mock };
+    honeyBatch: { findUnique: jest.Mock };
+    storageContainer: { findUnique: jest.Mock };
+  };
+
+  beforeEach(() => {
+    prisma = {
+      colony: { findUnique: jest.fn() },
+      apiary: { findUnique: jest.fn() },
+      queen: { findUnique: jest.fn() },
+      honeyBatch: { findUnique: jest.fn() },
+      storageContainer: { findUnique: jest.fn() },
+    };
+    service = new QrService(prisma as unknown as PrismaService);
+  });
+
+  it('rejects an unsupported entity type', async () => {
+    await expect(service.generateSvg('unknown', 'id-1')).rejects.toBeInstanceOf(
+      BadRequestException,
+    );
+  });
+
+  it('throws NotFoundException when the object does not exist', async () => {
+    prisma.colony.findUnique.mockResolvedValueOnce(null);
+    await expect(
+      service.generateSvg('colonies', 'missing'),
+    ).rejects.toBeInstanceOf(NotFoundException);
+  });
+
+  it('generates an SVG QR code for an existing colony', async () => {
+    prisma.colony.findUnique.mockResolvedValueOnce({ id: 'colony-1' });
+    const svg = await service.generateSvg('colonies', 'colony-1');
+    expect(svg).toContain('<svg');
+  });
+
+  it('generates an SVG QR code for an existing storage container', async () => {
+    prisma.storageContainer.findUnique.mockResolvedValueOnce({ id: 'sc-1' });
+    const svg = await service.generateSvg('storage-containers', 'sc-1');
+    expect(svg).toContain('<svg');
+  });
+});