如何在rspec邮件程序中设置header_cookies

group :test do
  gem 'rspec'
  gem 'rspec-rails'
end

require 'rspec'
require 'rspec/expectations'
require 'rspec/mocks'

RSpec.describe 'Mail Spec' do
  before(:each) do
    # 设置测试环境
  end

  after(:each) do
    # 清理测试环境
  end

  it 'should set header cookies' do
    # 设置header cookies
  end
end

it 'should set header cookies' do
  # 发送邮件
  MyMailer.send_email.deliver_now

  # 获取发送的邮件
  mail = ActionMailer::Base.deliveries.last

  # 设置header cookies
  mail.header['Set-Cookie'] = 'cookie_name=cookie_value'

  # 断言邮件的header cookies是否设置成功
  expect(mail.header['Set-Cookie']).to eq('cookie_name=cookie_value')
end

rspec mail_spec.rb