Cypress:我怎样才能得到Cypress在无头模式下开始录制的时间戳？

Cypress.Commands.add('getTimestamp', () => {
  return new Date().getTime();
});

{
  "baseUrl": "http://localhost:3000",
  "supportFile": "cypress/support/index.js",
  "pluginsFile": "cypress/plugins/index.js",
  "hooks": {
    "before": () => {
      cy.getTimestamp().then(timestamp => {
        Cypress.env('startTime', timestamp);
      });
    }
  }
}

describe('My Test Suite', () => {
  it('should do something', () => {
    cy.visit('/');
    // 执行一些测试步骤
    cy.log(`Start time: ${Cypress.env('startTime')}`);
  });
});