Question

我们正在使用Michael Hartl的Rails教程作为构建完全不同的RoR应用程序的灵感。

但是，我们偶然发现了一个可能对本教程后的其他人有所帮助的问题。

以下是我们的user_index_test.rb文件：

test "index as admin including pagination and delete links" do
    log_in_as(@admin)
    get users_path
    assert_select 'div.pagination'
    first_page_of_users = User.paginate(page: 1)
    first_page_of_users.each do |user|
      assert_select 'a[href=?]', user_path(user), text: user.first_name + " " + user.first_name
      unless user == @admin
        assert_select 'a[href=?]', user_path(user), text: 'delete'
      end
    end
    assert_difference 'User.count', -1 do
      delete user_path(@non_admin)
    end
  end

以下是我们的index.html.erb文件：

<h1>All users</h1>

<div class="row">

    <div class="pagination col-md-6 col-md-offset-3">

        <%= will_paginate %>

        <ul class="users">
          <% @users.each do |user| %>
            <%= render user %>
          <% end %>
        </ul>

        <%= will_paginate %>

    </div>

</div>

在浏览器中呈现以下HTML：

<div class="row">

    <div class="col-md-6 col-md-offset-3">

        <div class="pagination"><ul class="pagination"><li class="prev previous_page disabled"><a href="#">← Previous</a></li> <li class="active"><a rel="start" href="/users?page=1">1</a></li> <li><a rel="next" href="/users?page=2">2</a></li> <li><a href="/users?page=3">3</a></li> <li><a href="/users?page=4">4</a></li> <li><a href="/users?page=5">5</a></li> <li><a href="/users?page=6">6</a></li> <li><a href="/users?page=7">7</a></li> <li><a href="/users?page=8">8</a></li> <li><a href="/users?page=9">9</a></li> <li><a href="/users?page=10">10</a></li> <li><a href="/users?page=11">11</a></li> <li class="next next_page "><a rel="next" href="/users?page=2">Next →</a></li></ul></div>

        <ul class="users">
            <li>
  <a href="/users/1">Billy Joel</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/1">delete</a>
</li>
            <li>
  <a href="/users/2">Stevie Wonder</a>
</li>
            <li>
  <a href="/users/3">Michael Jackson</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/3">delete</a>
</li>
            <li>
  <a href="/users/4">Sterling Archer</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/4">delete</a>
</li>
            <li>
  <a href="/users/5">Telly Miller</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/5">delete</a>
</li>
            <li>
  <a href="/users/6">Elvie Lindgren</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/6">delete</a>
</li>
            <li>
  <a href="/users/7">Kianna Beier</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/7">delete</a>
</li>
            <li>
  <a href="/users/8">Wilhelmine Wuckert</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/8">delete</a>
</li>
            <li>
  <a href="/users/9">Blanche Moore</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/9">delete</a>
</li>
            <li>
  <a href="/users/10">Hailey Jacobson</a>
    | <a data-confirm="You sure?" rel="nofollow" data-method="delete" href="/users/10">delete</a>
</li>
        </ul>

        <div class="pagination"><ul class="pagination"><li class="prev previous_page disabled"><a href="#">← Previous</a></li> <li class="active"><a rel="start" href="/users?page=1">1</a></li> <li><a rel="next" href="/users?page=2">2</a></li> <li><a href="/users?page=3">3</a></li> <li><a href="/users?page=4">4</a></li> <li><a href="/users?page=5">5</a></li> <li><a href="/users?page=6">6</a></li> <li><a href="/users?page=7">7</a></li> <li><a href="/users?page=8">8</a></li> <li><a href="/users?page=9">9</a></li> <li><a href="/users?page=10">10</a></li> <li><a href="/users?page=11">11</a></li> <li class="next next_page "><a rel="next" href="/users?page=2">Next →</a></li></ul></div>

    </div>

</div>

然而，这是集成测试的结果：

FAIL["test_index_as_admin_including_pagination_and_delete_links", UsersIndexTest, 2015-06-30 06:44:20 -0700]
 test_index_as_admin_including_pagination_and_delete_links#UsersIndexTest (1435671860.33s)
        Expected at least 1 element matching "div.pagination", found 0..
        Expected 0 to be >= 1.
        test/integration/users_index_test.rb:23:in `block in <class:UsersIndexTest>'

知道什么是错的？

更新：关注@steve klein建议（来自评论），我们更新了users_index_test.rb文件：

test "index as admin including pagination and delete links" do
    log_in_as(@admin)
    get users_path
    assert_template 'users/index'
    assert_select 'div.pagination'
    first_page_of_users = User.paginate(page: 1)
    first_page_of_users.each do |user|
      assert_select 'a[href=?]', user_path(user), text: user.first_name + " " + user.first_name
      unless user == @admin
        assert_select 'a[href=?]', user_path(user), text: 'delete'
      end
    end
    assert_difference 'User.count', -1 do
      delete user_path(@non_admin)
    end
  end

这是由此产生的失败测试：

FAIL["test_index_as_admin_including_pagination_and_delete_links", UsersIndexTest, 2015-06-30 06:44:19 -0700]
 test_index_as_admin_including_pagination_and_delete_links#UsersIndexTest (1435671859.86s)
        expecting <"users/index"> but rendering with <[]>
        test/integration/users_index_test.rb:23:in `block in <class:UsersIndexTest>'

Answer 1

我也收到了这条失败的测试消息，发现我犯了一个有趣的错误：我忘了将假用户的名字"michael"更改为../test/fixtures/microposts.yml中我自己的测试名称。

我是否已经生成了足够的伪造微电影

如果您总是像我一样更改变量名称，请检查它是否生成足够的微博进行测试。确保@admin中的user_index_test.rb值等于user: your_admin_user_name中的microposts.yml。

希望这个帮助=）

Answer 2

这似乎是Hartl教程的一个问题 - 这是我发现的第一个错字。我在使用Hartl的教程（第3版）时遇到了这个问题。这就是我修复它的方法。

我认为问题是users_index_test.rb，当它在代码清单9.44中首次引入时，已经

  @user = users(:michael)

setup方法中的

。但是下次我们在代码清单9.57中看到文件更新时，setup方法改为使用两行：

  @admin     = users(:michael)
  @non_admin = users(:archer)

注意有些变化？它之前是@user，现在是@admin。令人讨厌的是，哈特尔并没有像往常那样强调这些线条，因为它们是不同的。在这种情况下，你只需要注意区别。

所以基本上，无论你使用@user还是@admin，只要确保在导致错误的行中使用相同的变量，即

  unless user == @admin
    assert_select 'a[href=?]', user_path(user), text: 'delete',
                                                method: :delete
  end

如果您完全按照代码清单9.57中的Hartl输入代码，并且始终使用@admin，则不会收到错误。或者您可以将unless块中的变量更改为@user（如果这是setup方法中的内容），那么它也可以使用。

Rails Minitest集成测试中断：预计至少有1个元素匹配＆＃34; div.pagination＆＃34;，找到0

2 个答案: