gistfile1.rb

#fizzbuzz_test.rb

# "Write a program that prints the numbers from 1 to 100. 
# But for multiples of three print “Fizz” instead of the 
# number and for the multiples of five print “Buzz”. 
# For numbers which are multiples of both three and five 
# print “FizzBuzz”."

class FizzBuzz
 
  def run(max=100)
    result = ''
    (1..max).each do |num|
      result << fizzbuzz(num)
    end
    result
  end

  def fizzbuzz(num)
    result = ''
    if num % 3 == 0
      result << 'Fizz'
    end
    if num % 5 == 0
      result << 'Buzz'
    end
    if result == ''
      result = "#{num}"
    end
    return result
  end
end

#fizzbuzz.rb

require_relative "fizzbuzz"
require "test/unit"
 
class TestFizzBuzz < Test::Unit::TestCase
 
  def test_number
    assert_equal('4', FizzBuzz.new.fizzbuzz(4) )
    assert_equal('1', FizzBuzz.new.fizzbuzz(1) )
  end 

  def test_Fizz
    assert_equal('Fizz', FizzBuzz.new.fizzbuzz(3) )
    assert_equal('Fizz', FizzBuzz.new.fizzbuzz(9) )
  end 

  def test_Buzz
    assert_equal('Buzz', FizzBuzz.new.fizzbuzz(5) )
    assert_equal('Buzz', FizzBuzz.new.fizzbuzz(25) )
  end
 
  def test_FizzBuzz
    assert_equal('FizzBuzz', FizzBuzz.new.fizzbuzz(15) )
    assert_equal('FizzBuzz', FizzBuzz.new.fizzbuzz(30) )
  end


  def test_CompleteFizzBuzz
    assert_equal('12Fizz4BuzzFizz78FizzBuzz11Fizz1314FizzBuzz1617Fizz', FizzBuzz.new.run(18) )
  end
end