Rails 4.1.1 - NameError: uninitialized class variable @@installed_at_exit in Test::Unit::Runner

[venka10]

I am developing test for a Rails 4.1.1 application and after I included shoulda-context as a gem, my tests no longer start. This is what I get when I try to run a single test:

    /home/vashtakala/jruby-1.7.11/bin/jruby --1.9 -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /home/vashtakala/railsapps/lmd_bix/test/integration/cas/test_is_authentication_working.rb
    include_class is deprecated. Use java_import.
    log4j:WARN No appenders could be found for logger (mondrian.olap.MondrianProperties).
    log4j:WARN Please initialize the log4j system properly.
    MiniTest::Unit::TestCase is now Minitest::Test. From /home/vashtakala/jruby-1.7.11/lib/ruby/1.9/test/unit/testcase.rb:8:in `Unit'
    NameError: uninitialized class variable @@installed_at_exit in Test::Unit::Runner
              autorun at /home/vashtakala/jruby-1.7.11/lib/ruby/1.9/test/unit.rb:324
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/1.9/test/unit.rb:640
              require at org/jruby/RubyKernel.java:1085
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247
      load_dependency at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/thoughtbot-shoulda-2.11.1/lib/shoulda/integrations/test_unit.rb:1
              require at org/jruby/RubyKernel.java:1085
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247
      load_dependency at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/thoughtbot-shoulda-2.11.1/lib/shoulda/integrations/test_unit.rb:1
              require at org/jruby/RubyKernel.java:1085
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/thoughtbot-shoulda-2.11.1/lib/shoulda.rb:1
                 each at org/jruby/RubyArray.java:1613
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/thoughtbot-shoulda-2.11.1/lib/shoulda.rb:9
                 each at org/jruby/RubyArray.java:1613
               (root) at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/bundler-1.6.3/lib/bundler/runtime.rb:1
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/bundler-1.6.3/lib/bundler/runtime.rb:76
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/bundler-1.6.3/lib/bundler/runtime.rb:72
              require at org/jruby/RubyKernel.java:1085
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/bundler-1.6.3/lib/bundler/runtime.rb:61
              require at org/jruby/RubyKernel.java:1085
              require at /home/vashtakala/jruby-1.7.11/lib/ruby/gems/shared/gems/bundler-1.6.3/lib/bundler.rb:132
              require at org/jruby/RubyKernel.java:1085
               (root) at /home/vashtakala/railsapps/lmd_bix/config/application.rb:8
               (root) at /home/vashtakala/railsapps/lmd_bix/config/environment.rb:1
                 load at org/jruby/RubyKernel.java:1101
               (root) at -e:1

    Process finished with exit code 1

Here is my Gemfile:

    source 'https://rubygems.org'

    # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
    gem 'rails', '4.1.1'
    # Use mysql as the database for Active Record
    gem 'activerecord-jdbcmysql-adapter', '~>1.3.0', :require => false, :platform => :jruby
    gem 'jdbc-mysql', '5.1.13'     # the current version gives an error
    # Use SCSS for stylesheets
    gem 'sass-rails', '~> 4.0.3'
    # Use Uglifier as compressor for JavaScript assets
    gem 'uglifier', '>= 1.3.0'
    # Use CoffeeScript for .js.coffee assets and views
    gem 'coffee-rails', '~> 4.0.0'
    # See https://github.com/sstephenson/execjs#readme for more supported runtimes
    gem 'therubyrhino'
    # Use jquery as the JavaScript library
    gem 'jquery-rails'

    gem 'puma'

    gem 'activerecord-session_store', github: 'rails/activerecord-session_store'

    group :nitc do
      gem 'torquebox', '3.1.0'
    end

    group :autotest do
      gem 'capybara'
      gem 'shoulda'
      gem 'thoughtbot-shoulda'
      gem 'selenium-webdriver'
    end

After googling, it appears that the solution is to specify in the Gemfile that I use minitest version 4, but, when I tried to do that, bundler told me that rails 4.1.1 required minitest 5.

[venka10]

Bundler error:

    Fetching gem metadata from https://rubygems.org/........
    Fetching additional metadata from https://rubygems.org/..
    Resolving dependencies............
    Bundler could not find compatible versions for gem "minitest":
      In Gemfile:
        minitest (~> 4.0) java

        rails (= 4.1.1) java depends on
          activesupport (= 4.1.1) java depends on
            minitest (5.1.0)

[hoffm]

@venka10 I'm facing the same issue and am wondering if you solved this. Did you?

[venka10]

I don't think i was able to resolve this issue.

[hoffm]

The 'test-unit-rails' gem solved the problem in my case, which involved hitting NameError: uninitialized class variable @@installed_at_exit in Test::Unit::Runner after upgrading to Rails 4.2. (I also had to upgrade mocha, but that's probably not relevant to your case.)

[mcmire]

We don't plan on supporting Rails 4.1 anymore since it's EOL, and we also don't plan on supporting versions of Test::Unit prior to 2. Considering this issue is so old, I'm going to close this.