Creating Test Suites In Ruby

The following is one way to create a suite of tests automatically in Ruby. There are probably better ways, but this works for me.

require 'test/unit'
require 'test/unit/testsuite'
require 'test/unit/ui/gtk2/testrunner'
require 'test/unit/ui/console/testrunner'

# The initial definition of AllTests is here so
# that we can refer to it in our redefinition of
# Class#inherited

class AllTests
  TESTS = Array.new
end

class Class
  def inherited(arg)
    if arg < Test::Unit::TestCase
      AllTests::TESTS << arg
    end
  end
end

Dir.glob('*test.rb').each {|f|
  require f
}

class AllTests

  def self.suite
    suite = Test::Unit::TestSuite.new('All Tests')
    TESTS.each {|t| suite << t.suite}
    suite
  end

end

if __FILE__ == $0
  Test::Unit::UI::GTK2::TestRunner.run(AllTests)
else
  Test::Unit::UI::Console::TestRunner.run(AllTests)
end