为什么RSpec抛出InvalidSignature错误？

问题描述

我是Ruby，Rails和TDD的新手，在测试过程中遇到了麻烦。 我正在尝试测试由FactoryBot创建的用户发布的食谱模型的创建。

我的食谱模型（app / models / recipe.rb）是：

class Recipe < ActiveRecord::Base
  resourcify

  validates :image,presence: true
  validates :title,presence: true
  validates :preparazione,presence: true

  belongs_to :user
  has_many :likes
  has_many :comments

  has_one_attached :image
end

在spec / models / recipe_spec.rb中，我有：

require "rails_helper"

RSpec.describe Recipe,type: :model do
  describe "Creating a Recipe" do
    it "should be permitted" do
  
      @user = FactoryBot.create(:user)
      recipe = Recipe.new(title: 'Recipe',preparazione: 'Preparation',image: '../support/test_image.jpg',user_id: @user.id,n_likes: 0,n_comments: 0,created_at: Time.now.utc)
      expect(recipe).to be_valid
      @user.destroy
    end
  end
end

此测试失败，错误是：

Failures:

1) Recipe Creating a Recipe should be permitted
 Failure/Error: expect(recipe).to be_valid

 ActiveSupport::MessageVerifier::InvalidSignature:
   ActiveSupport::MessageVerifier::InvalidSignature
 # ./spec/models/recipe_spec.rb:16:in `block (3 levels) in <top (required)>'

 Finished in 0.35273 seconds (files took 7.93 seconds to load)
 7 examples,1 failure

 Failed examples:

 rspec ./spec/models/recipe_spec.rb:5 # Recipe Creating a Recipe should be permitted

为什么会显示此错误，这是什么意思？

解决方法

def get_data():
    source = API_Instance()
    yield source.get_some_data()

def parse_data():
    data = get_data()
    while True:
        try:
            row_data = next(data)
            print(row_data)
        except StopIteration:
            break

在Rspec中使用Rack::Test::UploadedFile class上传附件。