req.getInput incorrectly typed for query

[DavidAmmeraal]

Describe the bug

When mocking a query, and using req.getInput, TS incorrectly infers the type.

To Reproduce
I've created an example repo to reproduce the bug:

https://github.com/DavidAmmeraal/msw-trpc-bug/blob/main/src/example.ts

Given the following:

trpcMsw.post.byId.query((req, res, ctx) => {
    assert.equal(req.getInput(), { id: '1' });

    return res(
      ctx.status(200),
      ctx.data({
        id: '1',
        title: 'test',
        text: 'test',
        createdAt: new Date(),
        updatedAt: new Date(),
      }),
    );
  })

TS tells me that req.getInput should be of type:

(property) getInput: () => {
    id: string;
}

However, when running the code (using npx ts-node src/example.ts), the return value is instead:

{
  0: {
    json: {
      id: '1'
    }
}

Expected behavior

I would expect getInput to return a value of shape:

{
    id: string;
}

Versions
"@trpc/next": "^10.37.1",
"@trpc/react-query": "^10.37.1",
"@trpc/server": "^10.37.1",
"typescript": "^5.1.3",

[DavidAmmeraal]

This seems to occur when using httpBatchLink, when using httpLink this doesn't happen, and I also see you mention that batch is not supported in the README. Can be closed if no plans for this.

[maloguertin]

This seems to occur when using httpBatchLink, when using httpLink this doesn't happen, and I also see you mention that batch is not supported in the README. Can be closed if no plans for this.

I would like to support httpBatchLink at some point since I actually use it and it would help to have tests that are closer to the real world usage of tRPC so I'll leave this open for now.