我正在尝试使用rails3。我正在使用railstutorial 网站，以了解有关rails3的更多信息;本教程非常好（我对rails2的经验很少）。
我有一个rspec的问题，目前阻止了我的进展。我看到教程推荐使用rspec2.0.0.beta.18 gem;我改为使用
安装了rspec2.0.0.beta.20 gembundle install
但是我发现这个版本的rspec存在问题 我对于integration_test的rspec看起来像是：
describe "LayoutLinks" do
it "should have a About page at '/about'" do
get '/about'
response.should have_selector('h1', :content => "About Us")
end
end
失败如下：
Failures:
1) LayoutLinks should have a About page at '/about'
Failure/Error: Unable to find matching line from backtrace
stack level too deep
# /home/arun/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/forwardable.rb:185
（注意：那些查看Chapter 5的人不会有理解上下文的问题。）
如果我在Gemfile中将rspec版本更改为2.0.0.beta.18并运行rspec我会收到以下错误
arun@ubuntu-world:~/Project/Rails/rails3/sample_app$ rspec spec/
/home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/runtime.rb:27:in `block in setup': You have already activated rspec-core 2.0.0.beta.20, but your Gemfile requires rspec-core 2.0.0.beta.18. Consider using bundle exec. (Gem::LoadError)
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/spec_set.rb:12:in `block in each'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/spec_set.rb:12:in `each'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/spec_set.rb:12:in `each'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/runtime.rb:17:in `setup'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler.rb:100:in `setup'
from /home/arun/Project/Rails/rails3/sample_app/config/boot.rb:8:in `<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from /home/arun/Project/Rails/rails3/sample_app/config/application.rb:1:in `<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from /home/arun/Project/Rails/rails3/sample_app/config/environment.rb:2:in `<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from /home/arun/Project/Rails/rails3/sample_app/spec/spec_helper.rb:3:in `<top (required)>'
from <internal:lib/rubygems/custom_require>:29:in `require'
from <internal:lib/rubygems/custom_require>:29:in `require'
from /home/arun/Project/Rails/rails3/sample_app/spec/requests/layout_links_spec.rb:1:in `<top (required)>'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/configuration.rb:302:in `load'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/configuration.rb:302:in `block in load_spec_files'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/configuration.rb:302:in `map'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/configuration.rb:302:in `load_spec_files'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/command_line.rb:18:in `run'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/runner.rb:46:in `run_in_process'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/runner.rb:37:in `run'
from /home/arun/.rvm/gems/ruby-1.9.2-p0/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/runner.rb:10:in `block in autorun'
答案 0 :(得分：2)
我遇到了同样的问题。在the end of Chapter 5，来自 /spec/requests/layout_links_spec.rb 的测试都失败并出现相同的错误（控制器测试工作正常）：
Failure/Error: Unable to find matching line from backtrace
stack level too deep
# C:/Ruby192/lib/ruby/1.9.1/forwardable.rb:185
对 /spec/requests/layout_links_spec.rb 文件进行一些故障排除后，似乎在此上下文中使用response是触发问题的原因。例如，如果文件如下所示，则没有错误：
require 'spec_helper'
describe "LayoutLinks" do
it "should run tests properly from this file" do
get '/'
end
end
但是从教程中复制的文件是：
require 'spec_helper'
describe "LayoutLinks" do
it "should have a Home page at '/'" do
get '/'
response.should have_selector('title', :content => "Home")
end
it "should have a Contact page at '/contact'" do
get '/contact'
response.should have_selector('title', :content => "Contact")
end
it "should have an About page at '/about'" do
get '/about'
response.should have_selector('title', :content => "About")
end
it "should have a Help page at '/help'" do
get '/help'
response.should have_selector('title', :content => "Help")
end
end
一旦调用response
这是在Windows 7上（我试图在系统级而不是在Cygwin中设置Ruby，Git，Vim和其他开发工具。）
Rspeicher - 按照RailsTutorial.org的步骤， /config/routes.rb 文件如下所示：
SampleApp::Application.routes.draw do
get "users/new"
match '/signup', :to => 'users#new'
match '/contact', :to => 'pages#contact'
match '/about', :to => 'pages#about'
match '/help', :to => 'pages#help'
root :to => 'pages#home'
end
答案 1 :(得分：1)
Rspec在Hartl教程的11章中一直很好。但不知何故，我搞砸了我的gemfille，我开始遇到同样的问题，rspec“堆栈级别太深”，无法通过'捆绑安装'来解决。所以我疯狂地做了一个
windows> gem uninstall rspec rspec-rails rspec-expectations rspec-mock rspec-core
（所有版本）。 '宝石清单'显示它们确实全部消失了。然后我执行了
> bundle install
...
Using rspec-core (2.0.0.beta.22)
Using rspec-expectations (2.0.0.beta.22)
Using rspec-mocks (2.0.0.beta.22)
Using rspec (2.0.0.beta.22)
Using rspec-rails (2.0.0.beta.22)
...
我的Gemfile中有什么。但是，'gem list -d rspec'仍然显示-no-rspec或rspec-xxx gems安装和rspec-core问题......
> rails g rspec:install *#for good measure*
...
> rspec -v
C:/Ruby192/lib/ruby/1.9.1/rubygems.rb:762:in `report_activate_error': Could not
find RubyGem rspec-core (>= 0) (Gem::LoadError)
但'捆绑列表'表示已安装。那么我如何让rspec再次运作呢？
更新
首先，我必须做一个
> gem install rspec -v 2.0.0.beta.22
> gem install rspec-rails -v 2.0.0.beta.22
而不是期望捆绑者这样做。捆绑在这里似乎不可靠。这让我再次调用了rspec，但我仍然不得不处理“堆栈级别太深”。通过将rspec和rspec-rails升级到2.0.1（来自David Chelimski：http://www.ruby-forum.com/topic/282245）来解决这个问题。再次更改我的Gemfile并调用bundle-install不起作用。我不得不卸载上面的所有五个rspec-xxx宝石并手动执行
> gem install rspec -v 2.0.1
> gem install rspec-rails -v 2.0.1
也许我不需要先卸载，但我做到了。海报很可能已经解决了他的问题，因为它很久以前，但这是我的解决方案，可能适用于其他人 - 回想一下我有Windows Vista64。
答案 2 :(得分：0)
每当您更改Gemfile时，都应通过重新运行bundle install来修复第二个错误。
至于第一个错误，您可以在routes.rb文件中发布您定义'/ about'路线的行吗？
答案 3 :(得分：0)
我再次运行“bundle install”，当我查看Gemfile和Gemfile.lock时，无论是使用2.0.0.beta.18还是2.0.0.beta.20，我都会找到相应的gems。
routes.rb映射/关于属于特定控制器的某些特定操作。当我在浏览器中访问页面时，我也得到了正确的页面;所以我认为这不是问题所在。 （不幸的是我现在没有代码，不能在这里粘贴）
以下是我无法理解的错误
arun@ubuntu-world:~/Project/Rails/rails3/sample_app$ rspec spec/
/home/arun/.rvm/gems/ruby-1.9.2-p0/gems/bundler-1.0.0/lib/bundler/runtime.rb:27:in `block in setup': You have already activated rspec-core 2.0.0.beta.20, but your Gemfile requires rspec-core 2.0.0.beta.18. Consider using bundle exec. (Gem::LoadError)
我知道 bundle exec 是什么，更不用说如何使用它了......
- 阿伦
答案 4 :(得分：0)
您需要使用gem uninstall删除其中一个宝石：
$ gem uninstall rspec-core -v 2.0.0.beta.20
您还可以使用gem list查看已安装的宝石版本。
答案 5 :(得分：0)
它绝对与Windows或您拥有的任何环境无关。我的Mac遇到了同样的问题。
我的routes.rb文件（来自同一个教程）看起来像这样：
SampleApp::Application.routes.draw do
resources :users
match '/signup', :to => 'users#new'
match '/contact', :to => 'pages#contact'
match '/about', :to => 'pages#about'
match '/help', :to => 'pages#help'
end
答案 6 :(得分：0)
您也可以尝试运行
bundle exec rake db:test:prepare