beforeEach钩子不能正确地改变上下文

Question

我需要相对于其他步骤放置一些步骤定义，因此如果上下文编写不正确，我将使用上下文警告测试编写者。

黄瓜

Scenario: doesn't need fixture
  Given I am "admin"
  And I am logged in

Scenario: uses fixture
  Given I am "admin"
  And I use the fixture "foo.json"
  And I am logged in

js

beforeEach(function () {
  this.isLoggedIn = false;
  cy.fixture('fixtures.json').as('fixtures');
});

given('I am {string}', function(username) {
  this.username = username;
});

given('I am logged in', function () {
  cy.request('/auth/login');
  this.isLoggedIn = true;
  // etc...
});

given('I use the fixture {string}', function(fixtureName) {
  if (this.isLoggedIn) throw new Error('You should declare fixtures before logging in');

  this.data = this.fixtures[fixtureName];
});

如果我在beforeEach钩子中进行一些控制台日志记录，我会发现在每次测试之前this.isLoggedIn都设置为false。但是，如果我在步骤定义中记录了相同的内容，则上下文似乎没有改变。

as is async，所以我认为可能是某些竞争条件阻止了上下文的设置，但是试图等待cy.fixture像这样的钩子完成

beforeEach(function() {
  return Promise.all([
    cy.fixture('fixtures'),
    cy.fixture('users')
  ]).then((fixtures, users) => {
    this.fixtures = fixtures;
    this.users = users;
    this.isLoggedIn = false;
  })
});

然后柏树告诉我can't use a promise in a hook ...

如何正确重置挂钩中的上下文？