Reverted the test updates and added new jest env hint.

Signed-off-by: Johannes Tegnér <johannes@jitesoft.com>

Author: Johannestegner

src/WebGenerator.js

@@ -3,8 +3,8 @@ import Generator from './Generator';
 export default class WebGenerator extends Generator {
   getRandom (len) {
     const list = new Uint8Array(len);
-    if ((global || window).crypto) {
-      (global || window).crypto.getRandomValues(list);
+    if (window.crypto) {
+      window.crypto.getRandomValues(list);
       return list;
     }
 

test/WebGenerator.test.js

@@ -1,3 +1,6 @@
+/**
+ * @jest-environment jsdom
+ */
 import WebGenerator from '../src/WebGenerator';
 
 const generator = new WebGenerator();
@@ -34,11 +37,11 @@ describe('Tests for web generator.', () => {
   });
 
   test('Uses crypt of it exists.', () => {
-    Object.defineProperty(global, 'crypto', {
-      value: {
-        getRandomValues: (a) => a.fill(1).values()
+    window.crypto = {
+      getRandomValues (array) {
+        array = array.fill(1).values();
       }
-    });
+    };
 
     const result = generator.getRandom(10);
     expect(result).toEqual(Uint8Array.from([1, 1, 1, 1, 1, 1, 1, 1, 1, 1]));