333% Test Speedup

README.md

333% Test Speedup

1. Normal Rails setup: 30 seconds for rake test
2. Using 1.9.3-falcon: 22 seconds
3. Using merged task w/ db reset: 16 seconds
4. Using merged task w/o db reset: 12 seconds
5. Using raw ruby execution: 9 seconds

You can run rake test:fast:db to get a merged run that resets your db. However, if you have clean tests that don't pollute the db between runs, you can just run rake test:fast and it will omit db:reset. This means your sequence numbers (under PostgreSQL, at least) may keep increasing, but if you tests against those I have other words for you.

xoxo <3 <3 <3 @ngauthier

rtest.sh

# Usage: rtest.sh test/**/*_test.rb
ruby -Ilib:test `bundle list rake`/lib/rake/rake_test_loader.rb $*

test.rake

namespace :test do
  desc 'Run tests quickly by merging all types and not resetting db'
  Rake::TestTask.new('fast') do |t|
    t.libs << 'test'
    t.pattern = "test/**/*_test.rb"
  end

  namespace :fast do
    desc 'Run tests quickly, but also reset db'
    task :db => ['db:test:prepare', 'test:fast']
  end
end

Awesome, yeah that was what I was going to try next. Maybe turn that into a bash alias or something. If you enable bash's globstar you can just do ruby -Itest -Ilib test/**/*_test.rb.

Updated with rtest.sh which is even faster.