From 2dc7fb2c19c0e63a7858d5b11f647a33e89a98a7 Mon Sep 17 00:00:00 2001
From: adamjmcgrath <adam.mcgrath@auth0.com>
Date: Thu, 17 Sep 2020 15:33:33 +0200
Subject: [PATCH] Fix SSR

---
 __tests__/cache.test.ts               | 1 +
 __tests__/transaction-manager.test.ts | 1 +
 jest.config.js                        | 3 +--
 src/storage.ts                        | 3 +++
 4 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/__tests__/cache.test.ts b/__tests__/cache.test.ts
index 05805b10c..0f38f89e7 100644
--- a/__tests__/cache.test.ts
+++ b/__tests__/cache.test.ts
@@ -1,3 +1,4 @@
+import 'jest-localstorage-mock';
 import { InMemoryCache, LocalStorageCache, ICache } from '../src/cache';
 
 const nowSeconds = () => Math.floor(Date.now() / 1000);
diff --git a/__tests__/transaction-manager.test.ts b/__tests__/transaction-manager.test.ts
index 251222fe2..f2b99aa11 100644
--- a/__tests__/transaction-manager.test.ts
+++ b/__tests__/transaction-manager.test.ts
@@ -1,3 +1,4 @@
+import 'jest-localstorage-mock';
 import TransactionManager from '../src/transaction-manager';
 import { SessionStorage } from '../src/storage';
 import { mocked } from 'ts-jest/utils';
diff --git a/jest.config.js b/jest.config.js
index d335eea41..dcf446055 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -12,6 +12,5 @@ module.exports = {
     ['jest-junit', { outputDirectory: 'test-results/jest' }]
   ],
   coverageReporters: ['lcov', 'text', 'text-summary'],
-  preset: 'ts-jest',
-  setupFiles: ['jest-localstorage-mock']
+  preset: 'ts-jest'
 };
diff --git a/src/storage.ts b/src/storage.ts
index 95d79df17..76982317e 100644
--- a/src/storage.ts
+++ b/src/storage.ts
@@ -85,6 +85,9 @@ export const CookieStorageWithLegacySameSite = {
  */
 export const SessionStorage = {
   get<T extends Object>(key: string) {
+    if (typeof sessionStorage === 'undefined') {
+      return;
+    }
     const value = sessionStorage.getItem(key);
     if (typeof value === 'undefined') {
       return;