Rails 单元测试

Question

请帮忙。我正在尝试为我的模型中的方法编写单元测试。它一直给我以下错误：

{ 1) 错误： test_Total_for_a_given_date_range_for_Campaigns(LetterTest)： TypeError：无法将 ActiveSupport::Duration 转换为字符串 c:/Users/Kay/rails-app/CS5942/app/models/letter.rb:19:in +' c:/Users/Kay/rails-app/CS5942/app/models/letter.rb:19:intribe_total_on' test/unit/letter_test.rb:17:in `block in '}

这是我的测试文件中的内容：

test "Total for a given date range for Campaigns" do        
  end_date = (Date.today + 1.day).to_date.strftime('%Y-%m-%d')
  expected = Letter.where("letter_campaign_id = '1' and created_at between '#{ (Date.today - 1.day).to_date.strftime('%Y-%m-%d')}' and #{end_date}").count
  data = Letter.tribe_total_on( 1 , (Date.today - 1.day).to_date.strftime('%Y-%m-%d') , (Date.today).to_date.strftime('%Y-%m-%d'))

  assert_equal expected, data
end

加号好像有问题。如果我能找到解决方案，我会很高兴。谢谢。

这是tribe_total_on方法：

def self.tribe_total_on(tribe, start_date, end_date)
  #Letter.connection.execute("SELECT COUNT(id) FROM letters WHERE letter_campaign_id = #{tribe} AND created_at BETWEEN '#{start_date.to_date.strftime('%Y-%m-%d')}' and '#{end_date.to_date.strftime('%Y-%m-%d')}'")[0][0]
  end_date = end_date + 1.day #This is line 19 ...Had to include the one day to accomodate dates like 2011-06-05 01:02:03

  Letter.where("letter_campaign_id = #{tribe} AND created_at between ? and ?", start_date.to_date, end_date.to_date).count
end

Answer 1

打开 Rails 控制台并输入你想要做的事情，你会得到这个：

(Date.today).to_date.strftime('%Y-%m-%d') + 1.day TypeError：无法将 ActiveSupport::Duration 转换为字符串 来自 (irb):20:in `+'

您要么必须在将 strftime 传递给tribe_total_on 之前将其转换为 strftime，要么必须在调用 strftime 之前将日期加上 1.day，然后再将其传递给tribe_total_on。

所以：

(Date.today + 1.day).to_date.strftime('%Y-%m-%d')

或：

def self.tribe_total_on(tribe, start_date, end_date)
  end_date = (end_date + 1.day).to_date.strftime('%Y-%m-%d')