typescript source code of test-runner

import { DocumentNode } from '@apollo/client/core';
import { ApolloClient, createHttpLink, InMemoryCache } from '@apollo/client/core';

import fetch from 'node-fetch';

interface QueryVariables {
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  [key: string]: any;
}

interface TestCase {
  id: string;
  query: DocumentNode;
  variables?: QueryVariables;
}

const SUBGRAPH_QUERY_ENDPOINT = 'http://127.0.0.1:8000/subgraphs/name/balancer-labs/balancer-v2';

export const runTestCases = async (groupName: string, testCases: TestCase[]): void => {
  const linkOptions = { uri: SUBGRAPH_QUERY_ENDPOINT, fetch };
  const link = createHttpLink(linkOptions);
  const cache = new InMemoryCache();
  let aClient = new ApolloClient({ link, cache });

  describe(`${groupName} resolvers`, () => {
    for (let testCase of testCases) {
      it(testCase.id, async () => {
        const res = await aClient.query({
          query: testCase.query,
          variables: testCase.variables || {},
        });
        expect(res).toMatchSnapshot();
      });
    }
  });
};