fix architecture and write new tests

apps/api/src/http/respond/respond.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it, vi } from 'vitest'
+import type { Response } from 'express'
+import { created, noContent, ok } from './index'
+
+function createResponseStub() {
+  const res = {
+    status: vi.fn(),
+    json: vi.fn(),
+    end: vi.fn(),
+  }
+
+  res.status.mockReturnValue(res)
+  res.json.mockReturnValue(res)
+  res.end.mockReturnValue(res)
+
+  return res as unknown as Response & typeof res
+}
+
+describe('http/respond helpers', () => {
+  it('ok responds with the expected data envelope', () => {
+    const res = createResponseStub()
+    const payload = { id: 'vehicle_1', name: 'Dacia Logan' }
+
+    ok(res, payload)
+
+    expect(res.status).not.toHaveBeenCalled()
+    expect(res.json).toHaveBeenCalledWith({ data: payload })
+  })
+
+  it('created responds with status 201 and the expected data envelope', () => {
+    const res = createResponseStub()
+    const payload = { id: 'reservation_1' }
+
+    created(res, payload)
+
+    expect(res.status).toHaveBeenCalledWith(201)
+    expect(res.json).toHaveBeenCalledWith({ data: payload })
+  })
+
+  it('noContent responds with status 204 and no body', () => {
+    const res = createResponseStub()
+
+    noContent(res)
+
+    expect(res.status).toHaveBeenCalledWith(204)
+    expect(res.end).toHaveBeenCalledWith()
+    expect(res.json).not.toHaveBeenCalled()
+  })
+})