教程Michael Hartl在10.3.4销毁微博

Question

当我收到此错误时，我真的不明白该怎么做：

Failures:

  1) MicropostPages micropost destruction as correct user should delete a micropost
     Failure/Error: expect { click_link "supprimer" }.to change(Micropost, :count).by(-1)
       count should have been changed by -1, but was changed by 0
     # ./spec/requests/micropost_pages_spec.rb:41:in `block (4 levels) in <top (required)>'

Finished in 4.12 seconds
92 examples, 1 failure

Failed examples:

rspec ./spec/requests/micropost_pages_spec.rb:40 # MicropostPages micropost destruction as correct user should delete a micropost

请注意，当我点击删除微博（链接“supprimer”）时，微博仍然存在。我给你我的代码，以便查看我是否有错误：

的 microposts_controller.rb

class MicropostsController < ApplicationController
    before_filter :signed_in_user, only: [:create, :destroy]
    before_filter :correct_user,   only: :destroy

def create
    @micropost = current_user.microposts.build(params[:micropost])
    if @micropost.save
        flash[:success] = "Micropost cree !"
        redirect_to root_url
    else
        @feed_items = []
        render 'static_pages/home'
    end
end

def destroy
    @micropost.destroy
    redirect_to root_url
end

private

    def micropost_params
        params.require(:micropost).permit(:content)
    end

    def correct_user
        @micropost = current_user.microposts.find_by(params[:id])
    rescue
        redirect_to root_url
    end

端

的 micropost_pages_spec.rb

describe "MicropostPages" do

    subject { page }

    let(:user) { FactoryGirl.create(:user) }
    before { sign_in user }

    describe "micropost creation" do
        [...]
    end

    describe "micropost destruction" do
        before { FactoryGirl.create(:micropost, user: user) }

        describe "as correct user" do
            before { visit root_path }

            it "should delete a micropost" do
                expect { click_link "supprimer" }.to change(Micropost, :count).by(-1)
            end
        end
    end
end

的 _micropost.html.erb

<li>
    <span class="content"> <%= micropost.content %> </span>
    <span class="timestamp">
        Posté il y a <%= time_ago_in_words(micropost.created_at) %>.
    </span>
    <% if current_user?(micropost.user) %>
        <%= link_to "supprimer", micropost, method: :delete, data: { confirm: "Etes vous sûr?"}, title: micropost.content %>
    <% end %>
</li>

的 _feed_item.html.erb

<li id="<%= feed_item.id %>">
    <%= link_to gravatar_for(feed_item.user), feed_item.user %>
    <span class="user">
        <%= link_to feed_item.user.name, feed_item.user %>
    </span>
    <span class="content">
        <%= feed_item.content %>
    </span>
    <span class="timestamp">
        Posted <%= time_ago_in_words(feed_item.created_at) %> ago.
    </span>

    <% if current_user?(feed_item.user) %>
    <%= link_to "supprimer", feed_item, method: :delete, data: { confirm: "Etes vous sûr?" },title: feed_item.content %>
    <% end %>
</li>

的 _feed.html.erb

<% if @feed_items.any? %>
    <ol class="microposts">
        <%= render partial: 'shared/feed_item', collection: @feed_items %>
    </ol>
    <%= will_paginate @feed_items %>
<% end %>

所以，我尝试不同的东西并在网上搜索，但没有找到任何帮助我将测试传递给绿色。

我希望你理解我的问题并抱歉我的英语不好

由于

---

---

编辑：我在运行spec / requests / micropost_pages_spec.rb时发现了我的问题。请看下面

我通过以下方式编辑microposts_controller.rb：

    def correct_user
        @micropost = current_user.microposts.find_by_id(params[:id])
        redirect_to root_path if @micropost.nil?
    end

对于_micropost.html.erb和_feed_item.html.erb：

<%= link_to "supprimer", micropost, method: :delete, 
                                    confirm: "Etes vous sûr?", 
                                    title: micropost.content %>

Answer 1

这可能是因为在继续之前有一条弹出消息要接受。这是由, data: { confirm: "Etes vous sûr?" }引起的。尝试删除它，看它是否有效。

如果有效，请阅读代码，并按照this post中的说法尝试：

page.driver.browser.switch_to.alert.accept

或者，取消：

page.driver.browser.switch_to.alert.dismiss

喜欢这个

it "should delete a micropost", js: true do
  expect do
    click_link "supprimer"
    page.driver.browser.switch_to.alert.accept
  end.to change(Micropost, :count).by(-1)
end