restoring local storage over tests

local-storage-restore.js

let LOCAL_STORAGE_MEMORY = {};

Cypress.Commands.add("saveLocalStorage", () => {
  cy.log("saveLocalStorage");
  Object.keys(localStorage).forEach(key => {
    LOCAL_STORAGE_MEMORY[key] = localStorage[key];
    console.log('localStorage')
    cy.log("saving[" + key + "]");
  });
});

Cypress.Commands.add("restoreLocalStorage", () => {
  cy.log("restoreLocalStorage");
  Object.keys(LOCAL_STORAGE_MEMORY).forEach(key => {
    localStorage.setItem(key, LOCAL_STORAGE_MEMORY[key]);
    console.log('localStorage')
    cy.log("restoring[" + key + "]");
  });
});

describe('Sessions', () => {
  beforeEach(() => {
    cy.restoreLocalStorage();
  });

  afterEach(() => {
    cy.saveLocalStorage();
  });

  before(() => {
    cy.visit('https://example.cypress.io/commands/local-storage')
    cy.get('.ls-btn').click().should(() => {
      expect(localStorage.getItem('prop1')).to.eq('red')
      expect(localStorage.getItem('prop2')).to.eq('blue')
      expect(localStorage.getItem('prop3')).to.eq('magenta')
    })
  });

  it('should visit page', () => {
    cy.visit('https://docs.cypress.io')
    cy.wrap(localStorage.getItem('prop1')).should('eq', 'red')
    cy.wrap(localStorage.getItem('prop2')).should('eq', 'blue')
    cy.wrap(localStorage.getItem('prop3')).should('eq', 'magenta')
  });

  it('should visit second page', () => {
    cy.visit('https://www.cypress.io')
    cy.wrap(localStorage.getItem('prop1')).should('eq', 'red')
    cy.wrap(localStorage.getItem('prop2')).should('eq', 'blue')
    cy.wrap(localStorage.getItem('prop3')).should('eq', 'magenta')
  });
});