Getting uninitialized constant error when trying to run tests

Question

I just updated all my gems and I\'m finding that I\'m getting errors when trying to run Test::Unit tests. I\'m getting the error copied below. That comes from creating new,

Answer 1

As with aronchick's comment, for me (OS X 10.6) solution was

sudo gem uninstall test-unit

all versions.

Answer 2

You get auto_test to work again with something like

RUBY="ruby  -I.:lib:test -rubygems -e 'gem \"test-unit\"'" autotest

Answer 3

Found the (ugly) solution:

gem 'unit/test' must be called inside the tests too, not only in the Rakefile.

Answer 4

This apparently comes from using Test::Unit 2.0 with the old Test::Unit. According to Kouhei Sutou on RubyForge, it can be fixed by calling gem 'test-unit' before you require 'test/unit'.

Answer 5

If you add the following line to your environment.rb, or your config/environments/test.rb this should fix the issue

config.gem "test-unit", :lib => "test/unit", :version => ">=2.0.9", :env => "test"

I Believe you will need to add it before the mocha line if you use mocha.

Answer 6

I was getting this without mocha or shoulda installed.

This post suggests it's due to an incompatibility in test-unit >= 2.0, which I installed as a dependency for the systools gems. Downgrading to 1.2.3 worked for me, a simple require might also.