A function to write a Cypress.io fixture (for subsequent XHR mocking) via a "temporarily live" API request

CypressRequestToJson.js

describe('Cypress Request to JSON Writer', () => {
  const JSON_PLACEHOLDER_API_URL = 'https://jsonplaceholder.typicode.com'
  const FILENAME = 'users.json'

  it('Writes XHR to a JSON fixture file', () => {
    const url = `${JSON_PLACEHOLDER_API_URL}/users` // the API call
    // Use cy.request to hit the API url. Add bearer token if auth required for API.
    cy.request({
      url: url,
      auth: {
        bearer: '',
      },
    }).then(
      response => {
        // use the response.body returned from API to write a fixture.
        cy.writeFile(`cypress/fixtures/${FILENAME}`, response.body)
      }
    )
  })
})