mock_local_storage.js

export function storageMock() {
  var storage = {};

  return {
    setItem: function(key, value) {
      storage[key] = value || "";
    },
    getItem: function(key) {
      return key in storage ? storage[key] : null;
    },
    removeItem: function(key) {
      delete storage[key];
    }
  };
}