migrate test server setup to separate file

test/resolvers/QueryResolverTests.test.ts

@@ -1,11 +1,10 @@
 import { beforeEach, describe, expect, it } from "@jest/globals";
 import { ApolloServer } from "@apollo/server";
 import { ServerContext } from "../../src/ServerContext";
-import { readFileSync } from "fs";
-import { MergedResolvers } from "../../src/MergedResolvers";
 import { UnoptimizedInMemoryRepository } from "../../src/repositories/UnoptimizedInMemoryRepository";
 import { generateMockSystems } from "../generators";
 import assert = require("node:assert");
+import { setUpTestServer } from "../testHelpers/apolloSetupHelpers";
 
 // See Apollo documentation for integration test guide
 // https://www.apollographql.com/docs/apollo-server/testing/testing
@@ -15,11 +14,7 @@ describe("QueryResolvers", () => {
   let repository: UnoptimizedInMemoryRepository;
 
   beforeEach(async () => {
-    const typeDefs = readFileSync("./schema.graphqls", "utf8");
-    testServer = new ApolloServer<ServerContext>({
-      typeDefs,
-      resolvers: MergedResolvers,
-    });
+    testServer = setUpTestServer();
 
     repository = new UnoptimizedInMemoryRepository();
   });