How to use easygraphql-tester with relay

Environment.js

// @flow
/* global __DEV__ */
import fs from'fs';
import path from'path';
import EasyGraphQLTester from 'easygraphql-tester';

import { installRelayDevTools } from 'relay-devtools';
import { Environment, Network, RecordSource, Store } from 'relay-runtime';
import RelayNetworkLogger from 'relay-runtime/lib/RelayNetworkLogger';

import cacheHandler from './cacheHandler';
import { fixtures } from './fixture'

const schema = fs.readFileSync(path.join(__dirname, '..', '..', 'data',  'schema.graphql'), 'utf8');
const tester = new EasyGraphQLTester(schema);

let networkQuery = cacheHandler
if (__DEV__) {
  installRelayDevTools();
  networkQuery = RelayNetworkLogger.wrapFetch(cacheHandler)
}

// If it is a test set this variable or process.env.NODE_ENV === 'test'
if (__TEST__) {
  networkQuery = fetchQuery
}

function fetchQuery(operation, variables) {
  const mockedQuery = tester.mock({
    query: operation.text,
    variables,
    fixture: fixtures[operation.name]
  })
  console.log('Mocked Query: --->', mockedQuery);
  return mockedQuery.json()
}

const network = Network.create(networkQuery);

const source = new RecordSource();
const store = new Store(source);

// export const inspector = new RecordSourceInspector(source);

const env = new Environment({
  network,
  store,
});

export default env;

fixture.js

export const fixtures = {
  UserListQuery: {
    pageInfo: { 
      hasNextPage: false,
      endCursor: 'hshdwocj='
    },
    edges: [{
      node: {
        name: 'yay'
      }
    }]
  }
}

result.json

// This will be the result of the query using easygraphql-tester and the fixtures
{
  "users": {
    "pageInfo": {
      "hasNextPage": false,
      "endCursor": "hshdwocj="
    },
    "edges": [
      {
        "node": {
          "id": "51",
          "name": "yay",
          "__typename": "User"
        }
      }
    ]
  }
}