Apollo-server: Unable to pass ApolloServer from apollo-server-express to createTestClient from apollo-server-testing

[dv29]

Getting the following error

Argument of type 'ApolloServer' is not assignable to parameter of type 'ApolloServerBase'.
      Types have separate declarations of a private property 'logger'.

following setup:

const server = new ApolloServer({ ... });
const { query } = createTestClient(server);

Package

{
    "apollo-server-express": "2.11.0",
    "apollo-server-testing": "2.15.1"
}

Expected Behavior: Should work without error

Reference : #1140

[ohsofoxy273]

This may not the most elegant solution, but I was able to get my resolver's integration test working (with jest as my test runner; using typescript) by setting the server instance to type "any" and the response to type "any".

const { query } = createTestClient(apolloServer as any);
const res: any = await query({ query: plansQuery });

Longer example:

it('fetches all plans', async () => {
  const category1 = await categoryFactory();
  await planFactory({ categoryId: category1.id });
  await planFactory({ categoryId: category1.id });
  const { query } = createTestClient(apolloServer as any);
  const res: any = await query({ query: plansQuery });
  expect(res.data.plans.length).toBe(2);
  expect(res.data.errors).toBe(undefined);
});

[jpqy]

I'm pretty sure these types of errors are caused by version mismatches from the apollo-server-* and apollo-server-testing packages that you are using. They change the typing between versions so different versions may declare and expect different types.

I had something very similar and solved it by making sure to specify the same version for the two in package.json and running npm/yarn install. I did need to restart my VSCode to get rid of the red squiggly for some reason.

There is no reason to use mismatched versions... apollo-server-testing should always defer to the version of the actual apollo-server package.

[deepvoracb]

i've tried using the same version for all of my apollo-server-* => 2.17.0 packages but it still gives the same error

[jpqy]

i've tried using the same version for all of my apollo-server-* => 2.17.0 packages but it still gives the same error

I'm on the same version as you (apollo-server-express) and it's working fine. Make sure to npm/yarn install after changing the versions (which afterwards should allow you to run tsc without error), and then possibly restart your IDE to get rid of the red squiggly.

[deepvoracb]

Whats the verison of apollo-server-testing that you are using? I've locked all of the version, removed node_modules and reinstalled everything. But its still the same.

[ohsofoxy273]

Whats the verison of apollo-server-testing that you are using? I've locked all of the version, removed node_modules and reinstalled everything. But its still the same.
I am using apollo-server-testing 2.16.0

[deepvoracb]

It worked, just had to clean global cache and reinstall everything. guess something to do thing with old cache