require 'benchmark'

cases = [
	'Word',
	'Simple sentance',
	'A one letter contatining sentance',
	'Cover the punctuation!',
	'',
	'Digits h3r3 and 4there'
]

def my_reverse(string)
	new_a = []
	t = string.size
	i = -1
	t.times do |time|
		new_a << string[i]
		i -= 1
	end
	new_a.join
end

def native_reverse(string)
	string.reverse
end


def test_my_realisation(cases)
	cases.each do |string|
		result = my_reverse(string)
		test_results(string, result)
	end
end

def test_built_in_realisation(cases)
	cases.each do |string|
		result = native_reverse(string)
		test_results(string, result)
	end
end

def test_results(input,output)
	raise if input.reverse != output
end

n = 5000
Benchmark.bm do |x|
  x.report('my:') { n.times{ test_my_realisation(cases) } }
  x.report('ru:') { n.times{ test_built_in_realisation(cases) } }
end