msw/test/node/msw-api/setup-server/scenarios/on-unhandled-request/warn.node.test.ts

// @vitest-environment node
import { setupServer } from 'msw/node'

const server = setupServer()

beforeAll(() => {
  server.listen({ onUnhandledRequest: 'warn' })
  vi.spyOn(global.console, 'warn').mockImplementation(() => void 0)
})

afterEach(() => {
  vi.clearAllMocks()
})

afterAll(() => {
  server.close()
  vi.restoreAllMocks()
})

test('warns on unhandled request when using the "warn" strategy', async () => {
  await fetch('http://localhost:3000/user').catch(() => void 0)

  expect(console.warn).toBeCalledWith(`\
[MSW] Warning: intercepted a request without a matching request handler:

  • GET http://localhost:3000/user

If you still wish to intercept this unhandled request, please create a request handler for it.
Read more: https://mswjs.io/docs/http/intercepting-requests`)
})

test(
  'ignores common static assets when using the "warn" strategy',
  { timeout: 10_000 },
  async () => {
    await fetch('http://localhost:3000/styles/main.css').catch(() => void 0)

    expect(console.warn).not.toHaveBeenCalled()
  },
)