［异常］undefined method `visit' for # RSpec::Core::ExampleGroup::Nested_1:0x16529f8 @example=nil

在进行Rspec 编译测试：

bundle exec rspec spec/requests/static_pages_spec.rb

提示错误：

Failures:

1) Static pages Home page should have the content 'Sample App'
Failure/Error: visit '/static_pages/home'
NoMethodError:
undefined method `visit' for #<RSpec::Core::ExampleGroup::Nested_1::Nested_1:0xba8829c>
# ./spec/requests/static_pages_spec.rb:5:in `block (3 levels) in <top (required)>'

2) Static pages Help page should have the content 'Help'
Failure/Error: visit '/static_pages/help'
NoMethodError:
undefined method `visit' for #<RSpec::Core::ExampleGroup::Nested_1::Nested_2:0xba8cd4c>
# ./spec/requests/static_pages_spec.rb:11:in `block (3 levels) in <top (required)>'

Finished in 0.00409 seconds
2 examples, 2 failures

Failed examples:

rspec ./spec/requests/static_pages_spec.rb:4 # Static pages Home page should have the content 'Sample App'
rspec ./spec/requests/static_pages_spec.rb:10 # Static pages Help page should have the content 'Help'

Randomized with seed 29742

解决办法：

在static_pages_spec.rb的末尾加入

module ::RSpec::Core
class ExampleGroup
include Capybara::DSL
include Capybara::RSpecMatchers
end
end

以上，解决～