Getting strange non-deterministic errors

package.json

@@ -25,7 +25,9 @@
   "license": "MIT",
   "jest": {
     "verbose": true,
-    "testMatch": ["**/src/**/?(*.)+(spec|test).js?(x)" ],
+    "testMatch": [
+      "**/src/**/?(*.)+(spec|test).js?(x)"
+    ],
     "globalSetup": "<rootDir>/src/jest/globalSetup",
     "globalTeardown": "<rootDir>/src/jest/globalTeardown"
   },

src/jest/helpers.js

@@ -1,9 +1,9 @@
 import { request } from 'graphql-request'
-import { GraphQLClient } from 'graphql-request'
+import fetch from 'node-fetch'
 
 export const host = 'http://127.0.0.1:3123'
 
-export async function getJWT({ email, password }) {
+export async function authenticatedHeaders ({ email, password }) {
   const mutation = `
       mutation {
         login(email:"${email}", password:"${password}"){
@@ -12,16 +12,27 @@ export async function getJWT({ email, password }) {
       }`
   const response = await request(host, mutation)
   const { token } = response.login
-  if(!token) throw `Could not get a JWT token from the backend:\n${response}`
-  return token
+  if (!token) throw new Error(`Could not get a JWT token from the backend:\n${response}`)
+  return {
+    authorization: `Bearer ${token}`
+  }
 }
 
-export async function authenticatedGraphQLClient(params){
-  const jwt = await getJWT(params)
-  const options = {
-    headers: {
-      'Authorization': `Bearer ${jwt}`
-    }
+export async function queryServer ({ headers, query, variables }) {
+  const defaultHeaders = {
+    Accept: 'application/json',
+    'Content-Type': 'application/json'
   }
-  return new GraphQLClient(host, options)
+  const response = await fetch(host, {
+    method: 'POST',
+    authenticatedHeaders,
+    headers: Object.assign({}, defaultHeaders, headers),
+    body: JSON.stringify({
+      operationName: null,
+      query,
+      variables
+    })
+  })
+  const json = await response.json()
+  return json.data
 }

src/middleware/permissionsMiddleware.spec.js

@@ -1,5 +1,5 @@
 import { create, cleanDatabase } from '../seed/factories'
-import { authenticatedGraphQLClient } from '../jest/helpers'
+import { authenticatedHeaders, queryServer } from '../jest/helpers'
 
 describe('authorization', () => {
   describe('given two existing users', () => {
@@ -19,25 +19,27 @@ describe('authorization', () => {
     })
 
     describe('logged in', () => {
-      let graphQLClient
+      let headers = {}
 
       beforeEach(async () => {
-        graphQLClient = await authenticatedGraphQLClient({ email: 'test@example.org', password: '1234' })
+        // headers = authenticatedHeaders({
+        //   email: 'test@example.org',
+        //   password: '1234'
+        // })
       })
 
-      describe('query email', () => {
-        const query = (params) => {
-          const { email } = params
-          return `{
-                    User(email: "${email}") {
+      describe('query email', async () => {
+        it('exposes the owner\'s email address', async () => {
+          const options = {
+            headers,
+            query: `{
+                    User(email: "test@example.org") {
                       email
                     }
                   }`
-        }
-
-        it('exposes the owner\'s email address', async () => {
-          const data = await graphQLClient.request(query({ email: 'test@example.org' }))
-          expect(data).toEqual({ User: [ { email: 'test@example.org' } ] })
+          }
+          const json = await queryServer(options)
+          expect(json).toEqual({ User: [ { email: 'test@example.org' } ] })
         })
       })
     })

src/seed/factories/index.js

@@ -4,7 +4,6 @@ import dotenv from 'dotenv'
 import { HttpLink } from 'apollo-link-http'
 import { InMemoryCache } from 'apollo-cache-inmemory'
 import neo4j from '../../bootstrap/neo4j'
-import { query } from '../../graphql-schema'
 import fetch from 'node-fetch'
 
 dotenv.config()
@@ -19,7 +18,6 @@ const client = new ApolloClient({
 })
 
 const driver = neo4j().getDriver()
-const session = driver.session()
 
 const builders = {
   'user': require('./users.js').default
@@ -34,7 +32,16 @@ const create = (model, parameters) => {
 }
 
 const cleanDatabase = () => {
-  return query('MATCH (n) DETACH DELETE n', session)
+  const session = driver.session()
+  const cypher = 'MATCH (n) DETACH DELETE n'
+  return session
+    .run(cypher)
+    .then(function (result) {
+      session.close()
+    })
+    .catch(function (error) {
+      console.log(error)
+    })
 }
 
 export {

yarn.lock

@@ -5420,7 +5420,7 @@ node-fetch@2.1.2:
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.1.2.tgz#ab884e8e7e57e38a944753cec706f788d1768bb5"
   integrity sha1-q4hOjn5X44qUR1POxwb3iNF2i7U=
 
-node-fetch@^2.1.2, node-fetch@^2.2.0, node-fetch@~2.3.0:
+node-fetch@^2.1.2, node-fetch@^2.2.0, node-fetch@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.3.0.tgz#1a1d940bbfb916a1d3e0219f037e89e71f8c5fa5"
   integrity sha512-MOd8pV3fxENbryESLgVIeaGKrdl+uaYhCSSVkjeOb/31/njTpcis5aWfdqgNlHIrKOLRbMnfPINPOML2CIFeXA==