普通项目上的RSpec MustBeConfiguredBeforeExampleGroupsError

Question

我正在设置一个Rails 3.1项目,并希望使用RSpec正确测试它.

运行rails g rspec:install并进一步运行后rspec,控制台消息如下所示:

% rspec
/Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:470:in `assert_no_example_groups_defined': RSpec's mock_framework configuration option must be configured before any example groups are defined, but you have already defined a group. (RSpec::Core::Configuration::MustBeConfiguredBeforeExampleGroupsError)
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:168:in `mock_framework='
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:142:in `mock_with'
    from /Users/ened/project/spec/controllers/../spec_helper.rb:19
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core.rb:71:in `configure'
    from /Users/ened/project/spec/controllers/../spec_helper.rb:11
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:225:in `load_dependency'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `require'
    from /Users/ened/project/spec/controllers/submissions_controller_spec.rb:1
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:234:in `load'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:234:in `load'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:225:in `load_dependency'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:234:in `load'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:459:in `load_spec_files'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:459:in `map'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/configuration.rb:459:in `load_spec_files'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/command_line.rb:18:in `run'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/runner.rb:80:in `run_in_process'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/runner.rb:69:in `run'
    from /Library/Ruby/Gems/1.8/gems/rspec-core-2.7.0/lib/rspec/core/runner.rb:10:in `autorun'
    from /usr/bin/rspec:19

我rspec/spec_helper.rb看起来像这样:

# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  # == Mock Framework
  #
  # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
  #
  # config.mock_with :mocha
  # config.mock_with :flexmock
  # config.mock_with :rr
  config.mock_with :rspec

  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = true

  # If true, the base class of anonymous controllers will be inferred
  # automatically. This will be the default behavior in future versions of
  # rspec-rails.
  config.infer_base_class_for_anonymous_controllers = false
end

我以为它已经配置好了使用config.mock_with？我很困惑,缺少什么？

Answer 1

我刚碰到这个.事实证明,我的一些旧的(大约RSpec 1)规范有以下要求声明:

require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

大多数新规范都有此要求声明:

require 'spec_helper'

我从不打扰收拾旧款式.这意味着spec_helper.rb文件名以两种不同的方式传递给require:一个完整​​路径,一个本地路径.这反过来导致spec_helper.rb执行两次,触发错误.将所有require语句更改为简短的新样式修复了该问题.