Question

预期阻止并不像我期望的那样工作。我有一个期望，should change the name：

let!(:user) { FactoryGirl.create(:user) }  
let!(:parent_folder) { FactoryGirl.create(:folder, user_id: user.id) }

before { sign_in user }

describe '#update' do
     let(:new_name) { Faker::Lorem.word }
     let(:request) { patch :update, id: parent_folder.id, folder: { name: new_name, parent_id: nil, user_id: user.id } }

     it 'should change the name' do
         expect {
             request
         }.to change(parent_folder, :name).from(parent_folder.name).to(new_name)
     end
end

结果是：

  2) FoldersController#update should change the name
     Failure/Error: expect {
       expected #name to have changed from "consequatur" to "molestias", but did not change

这是为什么？我向你保证会发生变化：

SELECT  "users".* FROM "users"  WHERE "users"."id" = 1  ORDER BY "users"."id" ASC LIMIT 1
SELECT  "folders".* FROM "folders"  WHERE "folders"."user_id" = ? AND "folders"."id" = ? LIMIT 1
SAVEPOINT active_record_1
UPDATE "folders" SET "name" = ?, "updated_at" = ? WHERE "folders"."id" = 1
RELEASE SAVEPOINT active_record_1

更新

我的更新操作：

  def update
    respond_to do |format|
      if @folder.update(folder_params)
        format.html { redirect_to @folder, notice: 'Folder was successfully updated.' }
        format.json { render :show, status: :ok, location: @folder }
      else
        format.html { render :edit }
        format.json { render json: @folder.errors, status: :unprocessable_entity }
      end
    end
  end

当我在浏览器中自己动手时，效果很好......

Answer 1

问题是您的parent_folder对象需要重新加载才能看到更改。更改您使用parent_folder.reload.name的期望，而不是这样做：

it 'should change the name' do
  expect { 
    request 
  }.to change{ parent_folder.reload.name }.from(parent_folder.name).to(new_name)
end

测试数据库记录已更改

1 个答案: