Testing with supertest in an Express server

[davlet61]

Hi
I am trying to convert our express server from express-graphql to Yoga. The server is quite big with lots of tests previously written with Supertest. Now I successfully managed to migrate the server itself, however I am struggling to get supertest working.
Although buildHTTPExecutor works, I do not want to rewrite every test using it cos it will require a lot of time and work.

Is there any way to get it working with supertest? Any help appreciated 🙏🏼

[ardatan]

You can just pass the Yoga instance to the supertest just like an express instance.

[davlet61]

I was initially passing in app, but that didn't work at all. Requests were not being sent, so I tried with Yoga instance instead, which only partially worked

[EmrysMyrddin]

That's weird, it should work with Express instance.

You can take a look at our express example, it is using supertest in its tests.

Are you able to give us a reproduction example ?

[davlet61]

I can try to create one.

[davlet61]

Update:

It was a bit hard to create a reproducible example because there were many factors within the original code which would almost require to share the whole project. So I gave up on that :)

However, I was able to make it work after some playing around, found out that we were using proxyquire to load Express app and that wasn't working at all. Creating a new express() instance with i18n middleware and yoga server instance fixed the problem.

Also worth noting that express-graphql was okay with GET requests, but I had to change them to POST instead with Yoga. I remember seeing allowing GET requests somewhere, but couldn't find it 😀
Anyways, I am okay with POST reqs.

Thanks again for all the replies :)

[ardatan]

I am not sure how you tried GET requests but GET requests don't have request bodies so you need to add query and variables as search/query parameters to the URL.

[davlet61]

I am not sure how you tried GET requests but GET requests don't have request bodies so you need to add query and variables as search/query parameters to the URL.

Yes, I am aware of that, not sure how it worked either 😀
But the codebase had these tests everywhere and none of them failed until I migrated to Yoga :

it('should return an account', async () => {
 	const query = `
        query getSingleAccount($id: Int!) {
          account(id: $id) {
            foo
          }
        }`;
     const params = {
        query: query,
        variables: {
          id: account.id,
        },
      }
     const res = await request(app)
        .get('/graphql')
        .set('Authorization', authHeader)
        .send(params)
        .expect('Content-Type', /json/)
        .expect(200);

      const result = res.body.data.account;

      expect(result.id).to.equal(1000);
      expect(result.description).to.equal('foo bar');
    });
  });

anyhow, it is working, for now at least :)