LearnRubyTheHardWay Ex#46 - rake aborted, you should require 'minitest/autorun' - ruby-on-rails

Question

I'm on Example 46 of Learn Ruby The Hard Way - Creating a Project Skeleton
Link: http://learnrubythehardway.org/book/ex46.html
So I created all the directories which show up as the following:
skeleton/
NAME.gemspec
Rakefile
data
ext/
tests/
bin/
NAME
doc/
lib/
NAME
NAME.rb
lib/NAME
tests/
test_NAME.rb
I'm in the Skeleton directory in Powershell.
When I run rake test as the tutorial says to I get an error.
Here's the result from Powershell:
PS C:\ruby\learn\projects\skeleton> rake test
C:/RailsInstaller/Ruby2.1.0/bin/ruby.exe -I"lib;tests" -I"C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4
.2/lib" "C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb" "tests/test_NAME
.rb"
Warning: you should require 'minitest/autorun' instead.
Warning: or add 'gem "minitest"' before 'require "minitest/autorun"'
From:
C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit.rb:1:in `<top (required)>'
C:/ruby/learn/projects/skeleton/tests/test_NAME.rb:2:in `<top (required)>'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:15:in `block in <main>'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:4:in `select'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:4:in `<main>'
MiniTest::Unit::TestCase is now Minitest::Test. From C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit/testcase.rb:8:
in `<module:Unit>'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit.rb:676:in `<class:Runner>': undefined method `_run_suite' for class
`Test::Unit::Runner' (NameError)
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit.rb:261:in `<module:Unit>'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit.rb:15:in `<module:Test>'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/test/unit.rb:7:in `<top (required)>'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from C:/ruby/learn/projects/skeleton/tests/test_NAME.rb:2:in `<top (required)>'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:15:in `block
in <main>'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:4:in `select'
from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb:4:in `<main>'
rake aborted!
Command failed with status (1): [ruby -I"lib;tests" -I"C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/
lib" "C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/rake_test_loader.rb" "tests/test_NAME.rb
" ]
Tasks: TOP => test
(See full trace by running task with --trace)
The book says I should get the following response:
Loaded suite tests/test_NAME
Started
.
Finished in 0.000226 seconds.
1 tests, 1 assertions, 0 failures, 0 errors
But instead I get an error. I've search for fixes and using gem install minitest but keep in mind I don't have a gemfile and I don't know if I should for this type of project. If I needed one I assume the tutorial would say so. So what do I do to fix this issue?

Answer 1

You don't need a Gemfile. While you are at skeleton directory, just do:
gem install 'test-unit'
and then from the same directory:
rake test
All tests will pass.
P.S. I just reproduced the whole thing locally following your tutorial and got the error message as yours. Then, I installed the test-unit gem and after that the rake test is working without any error.