nightscout#6701 js-storage teardown

The first time js-storage is required it evaluates if it's running in the browser or not: https://github.com/julien-maurel/js-storage/blob/master/js.storage.js#L423 and will define the localstorage getters and setters accordingly. This becomes an issue if testing localstorage between UI and non-UI tests. reportstorage.test.js was requiring it before hashauth.test.js causing a conflict.

tests/hashauth.test.js

@@ -16,6 +16,8 @@ describe('hashauth', function ( ) {
   });
 
   after(function (done) {
+    // cleanup js-storage as it evaluates if the test is running in the window or not when first required
+    delete require.cache[require.resolve('js-storage')];
     done( );
   });
 

tests/reportstorage.test.js

@@ -1,7 +1,4 @@
 const should = require('should');
-const reportstorage = require('../lib/report/reportstorage');
-let storage = require('js-storage').localStorage;
-let mockStorage = require('./fixtures/localstorage');
 const defaultValues = {
     insulin: true,
     carbs: true,
@@ -18,17 +15,20 @@ const defaultValues = {
 };
 
 describe('reportstorage unit tests', () => {
+    let reportstorage, storage, mockStorage;
 
     beforeEach(() => {
-        storage._get = storage.get;
-        storage._set = storage.set;
+        reportstorage = require('../lib/report/reportstorage');
+        storage = require('js-storage').localStorage;
+        mockStorage = require('./fixtures/localstorage');
         storage.get = mockStorage.get;
         storage.set = mockStorage.set;
     });
 
     afterEach(() => {
-        storage.get = storage._get;
-        storage.set = storage._set;
+        delete require.cache[require.resolve('js-storage')];
+        delete require.cache[require.resolve('./fixtures/localstorage')];
+        delete require.cache[require.resolve('../lib/report/reportstorage')];
     });
 
     it('reportstorage definition - returns saveProps and getValue function', () => {