如何通过页面对象实例之间它块在夜视？

Question

我正在使用“BDD描述”在nightwatch中编写ui测试。我遇到的一个问题是，我不能在“it”块之间使用相同的页面对象实例。我必须在每个“it”块中重复同一行代码才能运行测试。我重复下面的代码

const loginTest = browser.page.loginPage();

我有没有办法避免冗余？。这是我的测试。请注意夜视不允许我在描述块下创建实例。

describe('Login Cases', function() {

beforeEach (browser => browser.url(browser.launchUrl)

it('Verify login is successful', async function (browser) {

  const loginTest = browser.page.loginPage();

  await loginTest.waitForElementVisible('@body')
  await loginTest.setValue('@emailInput',browser.globals.Username)
  await loginTest.setValue('@passwordInput',browser.globals.Password)
  await loginTest.click('@submitBtn')
  await loginTest.expect.element('@myAccountBtn').to.be.visible;
});

it('Verify incorrect login', async function (browser) {

  const loginTest = browser.page.loginPage();

  await loginTest.waitForElementVisible('@body')
  await loginTest.setValue('@emailInput','incorrectusername')
  await loginTest.setValue('@passwordInput','incorrectpwd')
  await loginTest.click('@submitBtn')
  await loginTest.expect.element('@myAccountBtn').to.not.be.present;
});

   afterEach (browser => browser.end());
});

This is how i wrote for before block to instantiate the login page object.  
its returning loginTest is not defined.  

beforeEach(async function(browser) {
const loginTest = browser.page.loginPage();
browser => browser.url(browser.launchUrl)

});

当我实例化页面对象时，我通过使用这个关键字解决了这个问题。

beforeEach(async function(browser) {
  this.loginTest = await browser.page.loginPage()
  await this.loginTest.loginSuccess(browser.globals.Username,browser.globals.Password)
  this.myAccounttest = await browser.page.myAccountPage();
});

Answer 1

 beforeEach(async function(browser) {
  this.loginTest = await browser.page.loginPage()
  await this.loginTest.loginSuccess(browser.globals.Username,browser.globals.Password)
  this.myAccounttest = await browser.page.myAccountPage();
});

当我们启动页面对象时使用this关键字可以解决这个问题。

详细留档可以在这里找到-https://nightwatchjs.org/guide#using-bdd-describe-beta-