clear localstorage-mock after each test

frontend/app/__mocks__/localstorage.ts

@@ -0,0 +1,5 @@
+import 'jest-localstorage-mock';
+
+afterEach(() => {
+  localStorage.clear();
+});

frontend/app/typings/jest-localstorage-mock.d.ts

@@ -0,0 +1,3 @@
+declare module 'jest-localstorage-mock' {
+  export const clear: () => void;
+}

frontend/jest.config.js

@@ -17,7 +17,7 @@ module.exports = {
   },
   setupFiles: ['<rootDir>/jest.setup.ts'],
   setupFilesAfterEnv: [
-    'jest-localstorage-mock',
+    '<rootDir>/app/__mocks__/localstorage.ts',
     '<rootDir>/app/__mocks__/headers.ts',
     '<rootDir>/app/__stubs__/remark-config.ts',
     '<rootDir>/app/__stubs__/static-config.ts',