Question

在this上一个问题中，我询问了如何为Post和用户model构建测试。我现在想测试一个名为Comment的第三个模型。

schema.rb：

  create_table "posts", :force => true do |t|
    t.string   "title"
    t.string   "content"
    t.integer  "user_id"
    t.datetime "created_at",                               :null => false
    t.datetime "updated_at",                               :null => false
    t.integer  "comments_count",        :default => 0,     :null => false
    t.datetime "published_at"
    t.boolean  "draft",                 :default => false
  end

  create_table "comments", :force => true do |t|
    t.text     "content"
    t.integer  "post_id"
    t.integer  "user_id"
    t.datetime "created_at", :null => false
    t.datetime "updated_at", :null => false
  end

我特别想测试comments_count：想要在帖子中创建评论。他们之间的联系已经完成（has_many评论后）。并检查comments_count是否增加。

有人能举例说明测试的样子吗？

当前代码：

comment.rb：

class Comment < ActiveRecord::Base
  attr_accessible :content, :user_id

  belongs_to :post, :counter_cache => true
  belongs_to :user
end

规格/工厂：

FactoryGirl.define do
  factory :user do
    username     "Michael Hartl"
    email    "michael@example.com"
    password "foobar"
    password_confirmation "foobar"
  end
end

FactoryGirl.define do
  factory :post do
    title     "Sample Title"
    content    "Sample Content"
    published_at Time.now()
    comments_count 0
    draft false
    association :user
  end
end

规格/模型/ post_spec.rb：

require 'spec_helper'

describe Post do
  let(:post) { FactoryGirl.create(:post) }

  subject { post }

  it { should respond_to(:title) }
  it { should respond_to(:content) }
  it { should respond_to(:user_id) }
  it { should respond_to(:user) }
  it { should respond_to(:published_at) }
  it { should respond_to(:draft) }
  it { should respond_to(:comments_count) }

  its(:draft) { should == false }

  it { should be_valid }
end

（顺便说一下，这是我第一次在我的应用程序中测试一些东西。我是否在测试一些不需要测试的东西？是否有遗漏的东西应该？）

Answer 1

我们可能需要工厂征求意见：

FactoryGirl.define do
  factory :comment do
    content "Sample comemnt"
    association :user
    association :post
  end
end

以下测试（我在请求测试中添加）将检查以确保在用户向表单添加内容并单击右键时实际添加了注释：

describe "New comments" do
  let(:post) FactoryGirl.create(:post)
  let(:user) FactoryGirl.create(:user)

  context "valid with content comment added to database" do

    before do
      visit post_path(post)
      fill_in 'Content', with: "A new comment."
    end

    expect { click_button 'Create Comment' }.to change(Comment, :count).by(1)
  end
end

此测试可能适用于评论模型规范：

describe Comment do
  let(:comment) { FactoryGirl.create(:comment) }

  subject { comment }

  it { should respond_to(:content) }
  it { should respond_to(:user_id) }
  it { should respond_to(:user) }
  it { should respond_to(:post_id) }

  it { should be_valid }

  it "should belong to a post which has a comment count of 1" do
    comment.post.comment_count.should equal 1
  end
end

然后进行此测试传递的方法是在注释模型中放置一些内容，以便在创建新注释时更新它所属的帖子中的comment_count属性。

我不是100％确定最后一次测试是否正确写入。我不确定你是否可以覆盖之前定义的主题。

测试此帖子和评论模型之间的关联？

1 个答案: