日期前后的RSpec Timecop故障似乎与时区有关

我们有一些测试(规格)在日期/时间前后失败。猜测这是UTC的问题,但不知道为什么这些规格通过了上一次接触项目(约8个月前)!?!

#规范/特征/注释/创建_规范rb

feature 'Comment creation', type: :feature, js: true do
  include CommentsPageHelpers
  ...
  let!(:current_date) { Date.parse('2017-01-03') }
  ...

  background do
    Timecop.freeze(current_date)
    ...
  end

  after do
    Timecop.return
  end

  shared_examples 'added comment' do |position:, text:|
    scenario 'adds single comment' do
        ...
        expect(page).to have_text 'January 3rd, 2017'
      end
    end
  end

视图(角度模板) #应用程序/视图/模板/注释.html.slim

.comment
  ...
  {{ comment.createdAt | moment: 'MMMM Do, YYYY' }}

Comment creation for image behaves like added comment adds single comment
     Failure/Error: expect(page).to have_text 'January 3rd, 2017'
       expected to find text "January 3rd, 2017" in "John Snow First comment message January 2nd, 2017Remove"
     Shared Example Group: "added comment" called from ./spec/features/comments/creation_spec.rb:76
     # ./spec/features/comments/creation_spec.rb:42:in `block (4 levels) in <top (required)>'
     # ./spec/features/comments/creation_spec.rb:39:in `block (3 levels) in <top (required)>'