class ZenTest

def is_test_class(klass)

(by inspecting its name).
Check the class klass is a testing class 
def is_test_class(klass)
  klass = klass.to_s
  klasspath = klass.split(/::/)
  a_bad_classpath = klasspath.find do |s| s !~ ($r ? /Test$/ : /^Test/) end
  return a_bad_classpath.nil?
end