const supertest = require('supertest'); const server = require('../lib/index'); const request = supertest(server); afterAll(() => { server.close(); }); describe('index', () => { it('serve logo', async () => { const response = await request.get('/logo.png'); expect(response.status).toBe(200); expect(response.headers['content-type']).toBe('image/png'); expect(response.headers['content-length']).toBe('89034'); }); });