RailsTutorial-筆記3-靜態頁面

時間 2019-12-13

原文原文鏈接

Demo3 simple app

來自 RailsTutorial 3rd 第三章javascript

新建項目

rails new demo3-simpleapp --skip-bundle

# 可更改gem源到國內 https://ruby.taobao.org
# 添加gem包

bundle install --without production

git

git init
git add -A
git commit -m "init simple app"
git remote add origin git@bitbucket.org:imedingyiming/demo3-simpleapp.git
git push -u origin --all

推送到heroku

heroku create demo3-simpleapp

git push heroku master

heroku logs

heroku open

切新分支

git checkout master

git checkout -b static-pages

靜態頁面控制器

rails g controller StaticPages home help

rails命令簡寫

rails  server      rails s
rails  console     rails c
rails  generate    rails g
bundle install     bundle
rake test          rake

推送

git status
git add -A
git commit -m "add static pages"
git push -u origin static-pages

Ruby文件名通常使用蛇底式,rails生成器使用underscore方法把駝峯式轉換成蛇底式html

rails撤銷操做

rails destroy controller StaticPages home help

rails destroy model User

bundle exec rake db:rollback

bundle exec rake db:migrate VERSION=0

開始測試 TDD

好處java
- 1.測試避免"迴歸",即因爲某些緣由以前能用的功能不能用了;git
- 2.有測試,重構(改變實現方式,但功能不變)時更有自信;安全
- 3.測試是應用代碼的客戶ruby
何時進行測試app
- 和應用代碼相比,測試代碼特別簡短,傾向於先編寫測試ide
- 若是實現的功能不清楚,傾向於先寫應用代碼佈局
- 爲安全先測試測試
- 只要發現一個問題,就編寫一個測試重現這個問題,以免迴歸,而後再編寫應用代碼修正問題
- 儘可能不爲之後可能修改的代碼編寫測試
- 重構以前要編寫測試,集中測試容易出錯的代碼
- 通常先編寫控制器和模型測試,再編寫集成測試,若是代碼常常變更就徹底不測試

第一個測試

ls test/controllers/
static_pages_controller_test.rb

# test/controllers/static_pages_controller_test.rb

require 'test_helper'

class StaticPagesControllerTest < ActionController::TestCase
  test "should get home" do
    get :home
    assert_response :success
  end

  test "should get help" do
    get :help
    assert_response :success
  end
end

# 執行測試
bundle exec rake test

TDD工做流

RED -> GREEN -> REWORK

1.RED

#添加
test "should get home" do
  get :home
  assert_response :success
  assert_select "title","Home | Ruby on Rails Tutorial"
end

test "should get help" do
  get :help
  assert_response :success
  assert_select "title","Help | Ruby on Rails Tutorial"
end

test "should get about" do
  get :about
  assert_response :success
  assert_select "title","About | Ruby on Rails Tutorial" #html標籤爲何內容
end

測試:bundle exec rake test

2.GREEN

#routes.rb
get 'static_pages/about'

#static_pages_controller.rb
def about
end

#static_pages/about.html.erb
<!DOCTYPE html>
<html>
<head>
  <title>About | Ruby on Rails Tutorial</title>
</head>
about
</html>

其餘相似

測試:bundle exec rake test

3.REWORK

佈局和嵌入式Ruby

app/views/layouts/application.html.erb

<!DOCTYPE html>
<html>
<head>
  <title><%= yield(:title)%></title>
  <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
  <%= csrf_meta_tags %>
</head>
<body>

<%= yield %>

</body>
</html>

about.html.erb

<% provide(:title, "about"%>
about

#其餘相似

測試:bundle exec rake test

高級測試技術,MiniTest報告程序(下一遍添加)

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