How do I add gem 'minitest' to my test helper?

Question

I am new to Ruby on Rails and testing. When I run rake test I get the following error:

/Users/jarvis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.3.4/lib/rack/backports
/uri/common_192.rb:53: warning: already initialized constant WFKV_
/Users/jarvis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/turn-0.8.3/lib/turn/autorun
/minitest.rb:14:in `<top (required)>': MiniTest v1.6.0 is out of date. (RuntimeError)
`gem install minitest` and add `gem 'minitest' to you test helper.
    from /Users/jarvis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.1.1/lib
/active_support/dependencies.rb:240:in `require'

I did gem install minitest and now it says to add gem 'minitest' to my test helper. Is this test/test_helper.rb, and if so, how do I "add" minitest?

Answer 1

Edit your Gemfile so that the gem is specified under the test group, like so:

group :test do
  gem "minitest"
end

(Posting the solution that the OP edited into the question, but did not post as an answer)

Answer 2

uninstall your minitest first. gem uninstall minitest.

if you are using turn make sure the version is less 0.8.3

put those code to your bottom of your Gemfile

group :test do
  gem 'turn', '< 0.8.3'
  gem 'minitest'
end

then run

bundle install