class MiniTest::Unit::TestCase

def self.bench_exp min, max, base = 10

def self.bench_exp min, max, base = 10
  min = (Math.log10(min) / Math.log10(base)).to_i
  max = (Math.log10(max) / Math.log10(base)).to_i
  (min..max).map { |m| base ** m }.to_a
end