feat(tests): Jest backend (38 tests), Jest RTL frontend (28 tests), Playwright E2E spec

backend/tests/animals.test.js

@@ -0,0 +1,120 @@
+const request = require('supertest');
+
+jest.mock('../src/lib/prisma', () => require('./__mocks__/prisma'));
+const prisma = require('../src/lib/prisma');
+const app = require('../src/app');
+
+const EXP_ID = 'bbbbbbbb-0000-0000-0000-000000000001';
+const ANIMAL = {
+  id: 'cccccccc-0000-0000-0000-000000000001',
+  experiment_id: EXP_ID,
+  animal_id_string: 'M-001',
+  animal_name: 'Whiskers',
+  _count: { daily_statuses: 0 },
+};
+
+beforeEach(() => jest.clearAllMocks());
+
+describe('GET /api/animals', () => {
+  it('returns animals filtered by experimentId', async () => {
+    prisma.animal.findMany.mockResolvedValue([ANIMAL]);
+    const res = await request(app).get(`/api/animals?experimentId=${EXP_ID}`);
+    expect(res.status).toBe(200);
+    expect(res.body).toHaveLength(1);
+    expect(res.body[0].animal_id_string).toBe('M-001');
+  });
+
+  it('returns 422 for invalid UUID experimentId', async () => {
+    const res = await request(app).get('/api/animals?experimentId=not-a-uuid');
+    expect(res.status).toBe(422);
+  });
+});
+
+describe('GET /api/animals/:id', () => {
+  it('returns animal with daily_statuses', async () => {
+    prisma.animal.findUnique.mockResolvedValue({ ...ANIMAL, daily_statuses: [] });
+    const res = await request(app).get(`/api/animals/${ANIMAL.id}`);
+    expect(res.status).toBe(200);
+    expect(res.body.animal_name).toBe('Whiskers');
+  });
+
+  it('returns 404 for unknown animal', async () => {
+    prisma.animal.findUnique.mockResolvedValue(null);
+    const res = await request(app).get('/api/animals/00000000-0000-0000-0000-000000000000');
+    expect(res.status).toBe(404);
+  });
+});
+
+describe('POST /api/animals', () => {
+  it('creates animal with UUID and writes CREATE audit log', async () => {
+    prisma.animal.create.mockResolvedValue(ANIMAL);
+    prisma.auditLog.create.mockResolvedValue({});
+
+    const res = await request(app)
+      .post('/api/animals')
+      .send({ experiment_id: EXP_ID, animal_id_string: 'M-001', animal_name: 'Whiskers' });
+
+    expect(res.status).toBe(201);
+    expect(res.body.id).toMatch(/^[0-9a-f-]{36}$/i);
+    expect(prisma.auditLog.create).toHaveBeenCalled();
+  });
+
+  it('returns 422 when experiment_id is missing', async () => {
+    const res = await request(app)
+      .post('/api/animals')
+      .send({ animal_id_string: 'M-001', animal_name: 'Whiskers' });
+    expect(res.status).toBe(422);
+    expect(res.body.details).toEqual(
+      expect.arrayContaining([expect.objectContaining({ field: 'experiment_id' })])
+    );
+  });
+
+  it('returns 422 when experiment_id is not a UUID', async () => {
+    const res = await request(app)
+      .post('/api/animals')
+      .send({ experiment_id: 'bad-id', animal_id_string: 'M-001', animal_name: 'Whiskers' });
+    expect(res.status).toBe(422);
+  });
+
+  it('returns 422 when animal_name is missing', async () => {
+    const res = await request(app)
+      .post('/api/animals')
+      .send({ experiment_id: EXP_ID, animal_id_string: 'M-001' });
+    expect(res.status).toBe(422);
+  });
+});
+
+describe('PUT /api/animals/:id', () => {
+  it('updates animal and writes UPDATE audit log', async () => {
+    const updated = { ...ANIMAL, animal_name: 'Mr Whiskers' };
+    prisma.animal.findUnique
+      .mockResolvedValueOnce(ANIMAL)
+      .mockResolvedValueOnce(updated);
+    prisma.animal.update.mockResolvedValue(updated);
+    prisma.auditLog.create.mockResolvedValue({});
+
+    const res = await request(app)
+      .put(`/api/animals/${ANIMAL.id}`)
+      .send({ animal_name: 'Mr Whiskers' });
+
+    expect(res.status).toBe(200);
+    expect(res.body.animal_name).toBe('Mr Whiskers');
+    expect(prisma.auditLog.create).toHaveBeenCalledWith(
+      expect.objectContaining({ data: expect.objectContaining({ action: 'UPDATE' }) })
+    );
+  });
+});
+
+describe('DELETE /api/animals/:id', () => {
+  it('deletes animal and writes DELETE audit log', async () => {
+    prisma.animal.findUnique.mockResolvedValue(ANIMAL);
+    prisma.animal.delete.mockResolvedValue(ANIMAL);
+    prisma.auditLog.create.mockResolvedValue({});
+
+    const res = await request(app).delete(`/api/animals/${ANIMAL.id}`);
+    expect(res.status).toBe(204);
+    expect(prisma.auditLog.create).toHaveBeenCalledWith(
+      expect.objectContaining({ data: expect.objectContaining({ action: 'DELETE' }) })
+    );
+  });
+});