migrate test server setup to separate file

test/testHelpers/apolloSetupHelpers.ts

@@ -0,0 +1,13 @@
+import { readFileSync } from "fs";
+import { ApolloServer } from "@apollo/server";
+import { MergedResolvers } from "../../src/MergedResolvers";
+
+export function setUpTestServer() {
+  // Leaving this separate from the main server in case
+  // configuration changes
+  const typeDefs = readFileSync("./schema.graphqls", "utf8");
+  return new ApolloServer({
+    typeDefs,
+    resolvers: MergedResolvers,
+  });
+}