Vite plugin a la jest-transform for GraphQL?

[jhalborg]

Is your feature request related to a problem? Please describe.

In Jest, you expose this transformer:

transform: {
    ....
    '\\.(gql|graphql)$': '@graphql-tools/jest-transform',
  },

Describe the solution you'd like
I am trying to move our tests from Jest to Vite, but am having trouble. It seems any test that includes GraphQL queries fail. We use

"@graphql-codegen/cli": "^5.0.0",
"@graphql-codegen/client-preset": "^4.1.0",

to generate types for our queries in integration tests. For example:

import { gql } from 'apollo-server-core';
import { GlobalUsersService } from '../__generated__/asset';
import { mockOperation } from './mockOperation';
import {
  UserNameQuery,
  UserNameQueryVariables,
} from '../__generated__/test-types/graphql';

const userNameQuery = gql(/* GraphQL */ `
  query UserName($emailAddress: String!) {
    user(emailAddress: $emailAddress) {
      ... on User {
        firstName
      }
    }
  }
`);

describe('verification test setup verification', () => {
  it('overrides context defaults', async () => {
    const firstNameMock = 'Svend';
    const emailToQuery = 'some-email@domain.com';

    const usersSpy = jest
      .spyOn(GlobalUsersService, 'getGlobalUserByEmailAddress')
      .mockResolvedValue({
        globalUsers: [
          {
            firstName: firstNameMock,
            b2CObjectId: 'someID',
          },
        ],
      });

    const result = await mockOperation<UserNameQuery, UserNameQueryVariables>(
      userNameQuery,
      {
        emailAddress: emailToQuery,
      },
      {
        // Override context.user with signInName to satisfy auth scope
        user: {
          signInName: emailToQuery,
        },
      }
    );

    expect(usersSpy).toHaveBeenCalledTimes(1);

    const { firstName } = result.data.user;

    expect(firstName).toEqual(firstNameMock);
  });
});

Describe alternatives you've considered

I hoped the graphql plugin for rollup would solve it, but it didn't :(

import { defineConfig } from 'vitest/config';
import graphql from '@rollup/plugin-graphql';

export default defineConfig(() => ({
  plugins: [graphql()],
  test: {
    globals: true,
    environment: 'node',
    globalSetup: './src/globalJestSetup.ts',
    reporters: ['verbose'],
    include: ['./src/**/*.{test,spec}.ts'],
  },
}));