Question

我在使用rspec时遇到了一些问题，即使一切都在localhost上运行，也会返回错误。

  1) Item pages item creation with invalid information should not create an item
     Failure/Error: expect { click_button "Add" }.not_to change(Item, :count)
     NoMethodError:
       undefined method `node_name' for nil:NilClass
     # (eval):2:in `click_button'
     # ./spec/requests/item_pages_spec.rb:20:in `block (5 levels) in <top (required)>'
     # ./spec/requests/item_pages_spec.rb:20:in `block (4 levels) in <top (required)>'

item_pages_spec.rb

require 'spec_helper'

describe "Item pages" do

  subject { page }

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

  describe "item creation" do
    before do 
      visit user_list_path(user, list)
      click_link "Add wish"
    end

    describe "with invalid information" do

      it "should not create an item" do
        expect { click_button "Add" }.not_to change(Item, :count)
      end

      # describe "error messages" do
      #   before { click_button "Add" }
      #   it { should have_content('error') } 
      # end
    end

    describe "with valid information" do

      before { fill_in 'item_title', with: "Lorem ipsum" }
      it "should create a item" do
        expect { click_button "Add" }.to change(Item, :count).by(1)
      end
    end
  end
end

创建项目的表单

<% if signed_in? %>

  <div id="addWish" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="addWishLabel" aria-hidden="true">
    <div class="modal-header">
      <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
      <h3 id="addWishLabel">Add wish</h3>
    </div>
    <div class="modal-body">
      <%= form_for(@item) do |f| %>
      <%= render 'shared/error_messages', object: f.object %>
      <div class="field">
        <%= f.hidden_field :list_id, value: @list.id %>
        <%= f.text_field :title, placeholder: "Title..." %>
        <%= f.text_field :link, placeholder: "Link..." %>
      </div>
    </div>
    <div class="modal-footer">
      <button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
      <%= f.submit "Add", class: "btn btn-primary" %>
      <% end %>
    </div>
  </div>
<% end %>

我对rails非常陌生，因此非常感谢任何帮助！

Answer 1

expect { click_button "Add" }.to_not change(Item.count)

expect { click_button "Add" }.to_not change(@items, :count)

Answer 2

如果有其他人来到此处，请检查您的html标签，如@lucas所述。可能是你的情况。我找到了here。如果您的标签严重关闭，Capybara无法正确找到您的按钮。就我而言，我有这个：

    <div>
    <%= form_tag do %>
      <%= submit_tag %>
    </div>
    <% end %>

关闭form_tag之外的div为我做了。

未定义的方法`node_name'代表nil：NilClass

2 个答案: