Examples with Testing

[theodesp]

We need examples for how to test the endpoints.

For example here is what I did:

// src/server.ts
export const app = createServer({
    port: 3000,
    hostname: '127.0.0.1',
    httpListener,
});

// tests/e2e/health.test.ts
import request from 'supertest';
import {app} from '../../src/server';

describe('/health', () => {
    it('returns 200 OK', () => {
        return request(app.server).get('/health')
            .expect(200);
    });
});

[JozefFlakus]

Yup, that's right. I will try to update the docs with a new topic inside Advanced group. It will reflect the integration tests topic. 💪

[JozefFlakus]

Solved with introduction of @marblejs/testing
https://docs.marblejs.com/testing/http-testing

[viglioni]

Sorry to comment on a closed issue or if I am in the wrong place, but I'm having a lot of trouble trying to test both ways

I'm using "@marblejs/core": "^3.5.0" also "@marblejs/testing": "^3.5.0"

I tried to upgrade to 4, but I had a lot of problems with rxjs 7, then I decided to go back to 3.5.0

I'm trying to do a very simple test:

The endpoint:

import { r } from '@marblejs/core'
import { mapTo } from 'rxjs/operators'

export const helloThere = r.pipe(
  r.matchPath('/'),
  r.matchType('GET'),
  r.useEffect(req => req.pipe(mapTo({ body: 'Hello there!' }))),
)

The test using jest:

const listener = httpListener({ effects: [helloThere] })

const httpTestBed = createHttpTestBed({
  listener,
})

 it('should return OK', async () => {
        const { request, finish } = await httpTestBed()

        const response = await pipe(
          request('GET'),
          request.withPath('/'),
          request.send,
        )
        
	expect(response.statusCode).toEqual(200)
				
        await finish()
      })

But I've got the error:

TypeError: Cannot read property 'path' of undefined

      at node_modules/@marblejs/core/dist/http/router/http.router.factory.js:13:59
          at Array.forEach (<anonymous>)
      at Object.<anonymous>.exports.factorizeRouting (node_modules/@marblejs/core/dist/http/router/http.router.factory.js:12:12)
      at Object.<anonymous>.exports.factorizeRoutingWithDefaults (node_modules/@marblejs/core/dist/http/router/http.router.factory.js:46:78)
      at node_modules/@marblejs/core/dist/http/server/http.server.listener.js:15:43
      at node_modules/fp-ts/lib/Reader.js:85:78
      at node_modules/@marblejs/core/dist/http/server/http.server.js:46:26
      at fulfilled (node_modules/@marblejs/core/dist/http/server/http.server.js:5:58)

Am I doing anything wrong?

---

The example with supertest doesn't work either.

node:internal/process/promises:246
         triggerUncaughtException(err, true /* fromPromise */);
         ^

[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "TypeError: Cannot read property 'path' of undefined".] {
 code: 'ERR_UNHANDLED_REJECTION'
}

Thanks for your attention.

[JozefFlakus]

Hi @viglioni,

Do you have a small reproducible repository that shows this problem?
I'm not sure if it will help you but the main repository shows an example usage of @marblejs/testing package.

Thanks!

[viglioni]

That example helped a lot! Thanks!!

I had seen only this example that I was not able to reproduce, probably because it was v2

This usually means that there are asynchronous operations that weren't stopped in your tests.

But I'm getting a strange promise error on Jest. Do you have any idea the reason?

https://github.com/Viglioni/marblejs-test-example

[JozefFlakus]

@viglioni probably because you import the listener from main.ts which when evaluated (imported) starts listening to the server (it produces side effect):
https://github.com/Viglioni/marblejs-test-example/blob/main/src/main.ts#L23

I highly recommend to separate server and listener definitions and bootstrap them in a separate file.

[viglioni]

Thanks a lot!

Also congratulations for the lib :)