LocalStorageWrapperStubService.ts

import {Injectable} from '@angular/core';

@Injectable()
export class LocalStorageWrapperStubService {

  constructor() { }

  private localStorage = new Map();

  remove(key) {
    return this.localStorage.delete(key);
  }

  get(key) {
    try {
      return this.localStorage.get(key);
    } catch (e) {
      return null;
    }
  }

  set(key, value) {
      return this.localStorage.set(key, JSON.stringify(value));
  }
}