Question

我如何在Rspec中测试类方法.trending，考虑到它有很多通过关联。 .trending工作但目前尚未在Rspec中进行适当的审查。有什么建议吗？

class Author < ActiveRecord::Base
  has_many :posts
  has_many :comments, through: :posts

  validates :name, presence: true
  validate :name_length

  def self.trending
    hash = {}
    all.each{|x|
      hash[x.id] = x.comments.where("comments.created_at >= ?", Time.zone.now - 7.days).count
    }
    new_hash = hash.sort_by {|k,v| v}.reverse!.to_h
    new_hash.delete_if {|k, v| v < 1 } 
    new_hash.map do |k,v,|
        self.find(k)      
    end
  end

  private

  def name_length
    unless name.nil?

      if name.length < 2
        errors.add(:name, 'must be longer than 1 character')
      end

    end
  end

end

测试我尝试使用（它没有工作）

  describe ".trending" do
    it "an instance of Author should be able to return trending" do
      @author = FactoryGirl.build(:author, name:'drew', created_at: Time.now - 11.years, id: 1)
      @post = @author.posts.build(id: 1, body:'hello', subject:'hello agains', created_at: Time.now - 10.years)
      @comment1 = @post.comments.build(id: 1, body: 'this is the body', created_at: Time.now - 9.years)
      @comment2 = @post.comments.build(id: 2, body: 'this was the body', created_at: Time.now - 8.years)
      @comment3 = @post.comments.build(id: 3, body: 'this shall be the body', created_at: Time.now - 7.minutes)
      Author.trending.should include(@comment3)
    end 
  end

Answer 1

FactoryGirl.build和ActiveRecord::Relation#build都不会将记录持久存储到数据库中 - 它们只返回未保存的对象实例 - 但Author.trending正在数据库中查找记录。您应该在实例上调用save以将其保留到数据库，或使用create代替build。

如何在Rspec中测试具有多个通过关联的类方法

1 个答案: