Cypress-start.js

// run command
npm install cypress --save-dev

// add in your scripts package.json
"cy:dev": "cypress open",

// run this command to create cypress folder and cypress.json
run run cy:dev 

// create a file in cypress/integration/login.js and add:
it("Load page", () => {
  cy.get('[data-testid=loginForm]')
})

// add this attribute in your Login.tsx
data-testid="loginForm"

// configurate your cypress.json
{
  "baseUrl": "http://localhost:3000",
  "chromeWebSecurity": false,
  "projectId": "myid",
}

// create another tests :)