Simple inline nonblocking testing without dependencies, and with readable stack traces

simple_testing.rb

TESTING = true
def clean_backtrace(e)
  puts "\t" + e.backtrace.reject{|t| t =~ /(assert_equal|[(\/]irb[.:\/)])/}.join("\n\t")
end
def assert_equal a, b 
  begin
    raise if TESTING and a != b
  rescue Exception => e
    puts "*** Assertion failed: ***\n #{a} not equal to #{b}"
    clean_backtrace(e)
  end
end
#Put asserts in this block to only run them when testing is on
def test(&block) 
  begin 
    block.call if TESTING
  rescue Exception => e
    puts "*** Exception during tests: ***\n #{e.message}"
    clean_backtrace(e)
  end
end