堆栈级别太深 (SystemStackError)答案

【问题标题】：stack level too deep (SystemStackError)堆栈级别太深 (SystemStackError)
【发布时间】：2012-03-31 10:14:03
【问题描述】：

我有 Sinatra 应用程序，需要测试我的应用程序。

功能/支持/env.rb：

require_relative "../../application"

require "capybara"
require "capybara/cucumber"
require "rspec"

World do
  Capybara.app = Application

  include Capybara::DSL
  include RSpec::Matchers
end

features/one.feature：

Feature: Test homepage
  In order to make sure people can open my site
  I want to check it opened

  Scenario: Opening first page
    Given I have opened homepage    
    Then I should see site header

测试一下：

cucumber features\one.feature

结果：

Feature: Test homepage
  In order to make sure people can open my site
  I want to check it opened

  Scenario: Opening first page    # features\one.feature:5
    Given I have opened homepage  # features\one.feature:6
    Then I should see site header # features\one.feature:7

1 scenario (1 undefined)
2 steps (2 undefined)
0m0.006s

You can implement step definitions for undefined steps with these snippets:

Given /^I have opened homepage$/ do
  pending # express the regexp above with the code you wish you had
end

Then /^I should see site header$/ do
  pending # express the regexp above with the code you wish you had
end

好吧，我已经创建了 features/step_definitions/agenda_steps.rb：

Given /^I have opened homepage$/ do
  pending # express the regexp above with the code you wish you had
end

Then /^I should see site header$/ do
  pending # express the regexp above with the code you wish you had
end

测试一下：

cucumber features\one.feature

结果：

Feature: Test homepage
  In order to make sure people can open my site
  I want to check it opened

  Scenario: Opening first page    # features\one.feature:5
    Given I have opened homepage  # features/step_definitions/agenda_steps.rb:1
C:/Ruby193/bin/cucumber:19: stack level too deep (SystemStackError)

为什么以及如何解决？

更新：如果我像这样重写我的 env.rb，问题就会消失：

require_relative "../../application"

require "capybara"
require "capybara/cucumber"
require "rspec"


Capybara.app = Application
#World do
#  Capybara.app = Application
# 
#  include Capybara::DSL
#  include RSpec::Matchers
#end

【问题讨论】：

您能否发布您的 Gemfile.lock 或更多，以便您使用什么版本的黄瓜、水豚和 rspec
我已经在这里发布了我的 Gemfile.lock：pastebin.com/8Ni5MSdj
@Jacob，Rspec 用于断言，而 Capybara 只是与网络驱动程序对话。话虽如此，你肯定需要 Rspec 和 Capybara（可能还有 Selenium）

标签： ruby cucumber sinatra capybara

【解决方案1】：

我得到了相同的外观错误..as

stack level too deep (SystemStackError)
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/cucumber-1.1.4/lib/cucumber/core_ext/instance_exec.rb:73..

我在 env.rb 的第一行上添加了require 'cucumber/rails'...首先加载。

现在我不再面临这个错误。

【讨论】：

【解决方案2】：

我相信只有 Capybara.app = Application 不应在 World 内声明，如您的示例所示。

这是我的工作env.rb：

ENV['RACK_ENV'] = 'test'
require File.join(File.dirname(__FILE__), '..', '..', 'rvs.rb')

require 'capybara'
require 'capybara/cucumber'
require 'rspec'
require 'r18n-core'

Capybara.app = RVS

class RVSWorld
  include R18n::Helpers
  include Capybara::DSL
  include RSpec::Expectations
  include RSpec::Matchers
end

World do
  RVSWorld.new
end

如您所见，RVSWorld 类只有包含必要模块的语句。

【讨论】：