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Ruby/Rails 遇到了一些单元测试正则表达式问题。

跑步：

  • 导轨 4.0.0
  • 红宝石 2.0.0-p247
  • RVM 1.23.5
  • Mac OSX 10.8.5

编写一个applicaton_helper方法，该方法将根据日期有多远来格式化日期。这是方法：

module ApplicationHelper
  def humanize_datetime time
    time = Time.at(time)
    date = time.to_date

    today   = Date.today

    time_format = "%-I:%M %p"

    #if the time is within today, we simply use the time
    if date == today
      time.strftime time_format

    # if  the time is within the week, we show day of the week and the time
    elsif today - date < 7
      time.strftime "%a #{time_format}"

    # if time falls before this week, we should the date (e.g. Oct 30)
    else
      time.strftime "%b %e"
    end
  end
end

这似乎给出了预期的结果，但由于某种原因，以下测试失败：

require 'test_helper'

class ApplicationHelperTest < ActionView::TestCase

  test "humanize_dateime should display only time when datetime is within today" do
    formatted = humanize_datetime Time.now
    assert_match /\A\d{1,2}\:\d\d (AM|PM)\z/, formatted
  end

  test "humanize_datetime should display day of week and time when datetime is not today but within week" do
    yesterday_formatted = humanize_datetime (Date.today - 1).to_time # yesterday
    assert_match /\A[a-zA-z]{3} \d{1,2}\:\d\d (AM|PM)\z/, yesterday_formatted

    within_week_formatted = humanize_datetime (Date.today - 6).to_time # just within this week
    assert_match /\A[a-zA-z]{3} \d{1,2}\:\d\d (AM|PM)\z/, within_week_formatted
   end

   test "humanize_datetime should display date when datetime is before this week" do
     last_week_formatted = humanize_datetime (Date.today - 7).to_time
     assert_match /\A[a-zA-Z]{3} \d{1,2}\z/, last_week_formatted
   end
end

最后一次测试失败，给出

1) 失败：ApplicationHelperTest#test_humanize_datetime_should_display_date_when_datetime_is_before_this_week [/Users/mohammad/rails_projects/stopSmoking/test/helpers/application_helper_test.rb:20]：预期/\A[a-zA-Z]{3} \d{1,2}\ z/ 匹配“10 月 8 日”。

这真的很奇怪，因为正则表达式对我来说看起来不错，而且我已经在http://rubular.com/上测试了这个表达式。这里的所有其他测试都通过了。我还尝试删除字符串分隔符的开头/结尾和 . 之后的量词\d。

关于为什么会发生这种情况的任何想法？

4

1 回答 1

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humanize_datetime如果月份的日期 < 10，您会添加一个额外的空间，因为"%b %e". 结果字符串 is not "Oct 8"but "Oct  8"。

您应该使用"%b %-d"或更改您的正则表达式。

编辑：减号前缀可能不适用于所有系统，有关更多详细信息，请参阅此答案。

于 2013-10-15T20:39:09.017 回答