ruby-on-rails - assert_select 在测试中不起作用

Question

我在互联网上搜索了答案，但一无所获...这让我发疯!

没有assert_select 语句在我的任何测试中起作用。我已经反复确认该元素实际上位于目标页面的 dom 中——确实如此——但每个测试都在 assert_select 语句上失败。甚至像 assert_select 'body' 这样通用!

这是一个测试:

require 'test_helper'

class UsersIndexTest < ActionDispatch::IntegrationTest
    def setup
        @user = users(:matt)
    end

    test "index including pagination" do
        log_in_as(@user)
        get users_path
        assert_template 'users/index'
        assert_select 'div.pagination'
        User.paginate(page: 1).each do |user|
            assert_select 'a[href=?]', user_path(user), text: user.first_name
        end
    end
end

这里是users/index.html.haml

%h1 All Users

= link_to 'New User', new_user_path

= will_paginate

%table
  %thead
    %tr
      %th
      %th First name
      %th Last name
      %th Email
      %th
      %th
      %th

  %tbody
    - @users.each do |user|
      %tr
        %td= gravatar_for(user)
        %td= user.first_name
        %td= user.last_name
        %td= user.email
        %td= link_to 'Show', user
        %td= link_to 'Edit', edit_user_path(user)
        %td= link_to 'Destroy', user, :method => :delete, :data => { :confirm => 'Are you sure?' }

= will_paginate

很无聊的东西，对吧？然而，测试失败:

FAIL["test_index_including_pagination", UsersIndexTest, 0.9574]
 test_index_including_pagination#UsersIndexTest (0.96s)
        Expected at least 1 element matching "div.pagination", found 0..
        Expected 0 to be >= 1.
        test/integration/users_index_test.rb:12:in `block in <class:UsersIndexTest>'

即使我将断言更改为 assert_select div，它也会失败。而且，当我访问索引页面时，我可以再次确认 div 存在。

我在这里错过了什么!？!？!？!

如果有帮助，这是我的 gemfile:

    source 'https://rubygems.org'

    gem 'rails',                  '4.2.0'
    gem 'pg'
    gem 'puma'
    gem 'turbolinks'
    gem 'jquery-rails'
    gem 'bcrypt',                 '~> 3.1.7'
    gem 'faker',                  '~> 1.4.2'
    gem 'sass-rails',             '~> 5.0.1'
    gem 'bootstrap-sass',         '~> 3.2.0'
    gem 'will_paginate',          '~>3.0.7'
    gem 'bootstrap-will_paginate','~>0.0.10'
    gem 'uglifier',               '>= 2.5.0'
    gem 'haml-rails',             '~> 0.8'
    gem 'jbuilder',               '~> 2.2.3'
    gem 'sdoc',                   '~> 0.4.0', group: :doc
    gem 'rest-client',            '~> 1.7.3'
    gem 'bourbon'

    group :development, :test do
      gem 'byebug'
      gem 'web-console',          '~> 2.0.0'
      gem 'spring'
      gem 'better_errors'
    end

    group :test do
      gem 'minitest-reporters',   '~> 1.0.5'
      gem 'mini_backtrace',       '~> 0.1.3'
      gem 'guard-minitest',       '~> 2.3.1'
    end

    group :production do
      gem 'rails_12factor'
    end

    ruby '2.2.0'

感谢 Steve Klein 提出打印响应正文的建议。不幸的是，情节只会变厚。身上明显有我要瞄准的标签!

在上面的测试中添加了一行

assert_template 'users/index'
puts @response.body
assert_select 'div.pagination'

并且输出有标签!

← 上一个 1

2

下一个 →

但还是失败了!!!

FAIL["test_index_as_admin_including_pagination_and_delete_links", UsersIndexTest, 1.412393] test_index_as_admin_including_pagination_and_delete_links#UsersIndexTest (1.41s)
    Expected at least 1 element matching "div.pagination", found 0..
    Expected 0 to be >= 1.
    test/integration/users_index_test.rb:15:in `block in <class:UsersIndexTest>'

Answer 1

确保您正在加载足够的测试数据来触发分页。除非分页启动，否则此选择器不会出现在您的页面上(取决于您如何在 Controller 操作中配置 will_paginate)。