Today trying to run my RSpec tests and I get an odd error:

uninitialized constant Test::Unit::TestResult::TestResultFailureSupport (NameError)
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:105:in const_missing'
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in require'

After doing some research online I found out that the issue is caused by Shoulda and Mocha being included in my app. It seems that if you put a gem dependence for Shoulda before Mocha,  you’ll get this error, so the fix is to place the gem dependence for Mocha before Shoulda.

config.gem “rspec”, :lib => false, :version => “>=1.2.6”
config.gem “rspec-rails”, :lib => ‘spec/rails’, :version => “>=1.2.6”
config.gem “mocha”
config.gem “thoughtbot-shoulda”, :lib => “shoulda”, :source => “”

Hope that helps


I hit the same error having shoulda in my environment.rb file, moving it to the test.rb (in environment folder) fixed the issue as well.