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

backend/tests/auditLogs.test.js

@@ -0,0 +1,70 @@
+const request = require('supertest');
+
+jest.mock('../src/lib/prisma', () => require('./__mocks__/prisma'));
+const prisma = require('../src/lib/prisma');
+const app = require('../src/app');
+
+const LOG = {
+  id: 'ffffffff-0000-0000-0000-000000000001',
+  table_name: 'experiments',
+  record_id: 'aaaaaaaa-0000-0000-0000-000000000001',
+  action: 'UPDATE',
+  changes: { before: { title: 'Old' }, after: { title: 'New' } },
+  timestamp: new Date().toISOString(),
+};
+
+beforeEach(() => jest.clearAllMocks());
+
+describe('GET /api/audit-logs', () => {
+  it('returns paginated logs', async () => {
+    prisma.auditLog.findMany.mockResolvedValue([LOG]);
+    prisma.auditLog.count.mockResolvedValue(1);
+
+    const res = await request(app).get('/api/audit-logs');
+    expect(res.status).toBe(200);
+    expect(res.body.logs).toHaveLength(1);
+    expect(res.body.total).toBe(1);
+    expect(res.body.logs[0].action).toBe('UPDATE');
+  });
+
+  it('filters by tableName', async () => {
+    prisma.auditLog.findMany.mockResolvedValue([LOG]);
+    prisma.auditLog.count.mockResolvedValue(1);
+
+    const res = await request(app).get('/api/audit-logs?tableName=experiments');
+    expect(res.status).toBe(200);
+    expect(prisma.auditLog.findMany).toHaveBeenCalledWith(
+      expect.objectContaining({ where: { table_name: 'experiments' } })
+    );
+  });
+
+  it('returns 422 for invalid recordId', async () => {
+    const res = await request(app).get('/api/audit-logs?recordId=not-a-uuid');
+    expect(res.status).toBe(422);
+  });
+
+  it('respects limit and offset params', async () => {
+    prisma.auditLog.findMany.mockResolvedValue([]);
+    prisma.auditLog.count.mockResolvedValue(0);
+
+    const res = await request(app).get('/api/audit-logs?limit=10&offset=20');
+    expect(res.status).toBe(200);
+    expect(res.body.limit).toBe(10);
+    expect(res.body.offset).toBe(20);
+  });
+});
+
+describe('GET /api/audit-logs/:id', () => {
+  it('returns a single log entry', async () => {
+    prisma.auditLog.findUnique.mockResolvedValue(LOG);
+    const res = await request(app).get(`/api/audit-logs/${LOG.id}`);
+    expect(res.status).toBe(200);
+    expect(res.body.action).toBe('UPDATE');
+  });
+
+  it('returns 404 for unknown log id', async () => {
+    prisma.auditLog.findUnique.mockResolvedValue(null);
+    const res = await request(app).get('/api/audit-logs/00000000-0000-0000-0000-000000000000');
+    expect(res.status).toBe(404);
+  });
+});