gistfile1.rb

namespace :test do
  Rake::TestTask.new(:gems => :environment) do |t|
    t.libs << "test"

    if ENV['GEM']
      t.pattern = "vendor/gems/#{ENV['GEM']}/test/**/*_test.rb"
    else
      t.pattern = 'vendor/gems/*/**/test/**/*_test.rb'
    end

    t.verbose = true
  end
  Rake::Task['test:gems'].comment = "Run the gem tests in vendor/gems/*/**/test (or specify with GEM=name)"
end