Use fetch-mock for tests and switch from node-fetch to isomorphic-fetch

.neutrinorc.js

@@ -32,7 +32,6 @@ module.exports = {
       '@neutrinojs/mocha', {
         exit: true,
         recursive: true,
-        timeout: 600000,
       }
     ],
   ]

package.json

@@ -34,6 +34,7 @@
     "dotenv": "^4.0.0",
     "googleapis": "^27.0.0",
     "ical-with-secure-request": "^0.6.0",
+    "isomorphic-fetch": "^2.2.1",
     "json2csv": "^3.11.0",
     "koa": "^2.3.0",
     "koa-cors": "0.0.16",
@@ -42,7 +43,6 @@
     "koa-router": "^7.2.1",
     "lodash": "^4.17.2",
     "moment": "^2.19.3",
-    "node-fetch": "^1.7.1",
     "qs": "^6.5.0",
     "query-string": "^5.0.1",
     "redis": "^2.7.0",
@@ -55,6 +55,7 @@
     "@neutrinojs/mocha": "^8.0.18",
     "@neutrinojs/node": "^8.0.18",
     "coveralls": "^3.0.0",
+    "fetch-mock": "^6.5.0",
     "husky": "^0.14.3",
     "lint-staged": "^7.0.5",
     "mocha-lcov-reporter": "^1.3.0",

src/fetch/text.js

@@ -1,5 +1,11 @@
+/* global fetch */
 import { createClient } from 'then-redis';
-import fetch from 'node-fetch';
+// This is important for being able to use 'fetch-mock' in tests
+// I also switch from node-fetch to isomorphic-fetch to make it work
+// both on node (test run) and the browser (loading the API)
+// Read 'fetch is assigned to a local variable, not a global'
+// http://www.wheresrhys.co.uk/fetch-mock/troubleshooting
+import 'isomorphic-fetch';
 import moment from 'moment';
 
 const defaultTtl = moment.duration(8, 'hours').as('seconds');