fizzbuzz.rb

require 'minitest/autorun'

def fizzbuzz(n)
    return 'FizzBuzz' if n % 15 == 0
    return 'Buzz' if n % 5 == 0
    return 'Fizz' if n % 3 == 0
    n
end

class TestFizzBuzz < Minitest::Test
    def test_fizz
        assert_equal 'Fizz', fizzbuzz(3)
    end
    
    def test_buzz
        assert_equal 'Buzz', fizzbuzz(5)
    end

    def test_fizzbuzz
        assert_equal 'FizzBuzz', fizzbuzz(15)
    end

    def test_others
        assert_equal 1, fizzbuzz(1)
    end
end