Question

I have a class defined in a file my Rails project’s lib dir that will implement a bunch of utility functions as class methods. I’d like to write tests against those methods using Test::Unit and have them run as part of the project’s regular testing routine.

I tried sticking a file at the top level of the test dir…

require 'test_helper'  class UtilsTest < ActiveSupport::TestCase   should 'be true' do     assert false   end end 

…but that didn’t work. The test didn’t run.

What is the normal way to test code that is not one of the regular parts of Rails?

Answer 1

You can put them in your units directory without any complications.

My Library:

[ cpm juno ~/apps/feedback ] cat lib/my_library.rb class MyLib   def look_at_me     puts 'I DO WEIRD STUFF'   end end 

My Test:

[ cpm juno ~/apps/feedback ] cat test/unit/fake_test.rb require 'test_helper'  class FakeTest < ActiveSupport::TestCase   # Replace this with your real tests.   def test_truth     require 'my_library'      puts 'RUNNING THIS NOW'     MyLib.new.look_at_me     assert true   end end 

And running it:

[ cpm juno ~/apps/feedback ] rake test:units (in /home/cpm/apps/feedback) /usr/bin/ruby1.8 -Ilib:test '/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb' 'test/unit/fake_test.rb' Loaded suite /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader Started RUNNING THIS NOW I DO WEIRD STUFF . Finished in 0.254404 seconds.  1 tests, 1 assertions, 0 failures, 0 errors Loaded suite /var/lib/gems/1.8/bin/rake Started  Finished in 0.00094 seconds.  0 tests, 0 assertions, 0 failures, 0 errors 

As long as it ends in _test.rb it should pick it up.