How can you test FizzBuzz with Ruby's MiniTest?

Question

ruby

There is a classic FizzBuzz

def fizz_buzz
  n = 0
  while n < 100
    n += 1
    if n % 3 == 0 && n % 5 == 0
      puts 'FizzBuzz'
    elsif n % 3 == 0
      puts 'Fizz'
    elsif n % 5 == 0
      puts 'Buzz'
    else
      puts n
    end
  end
end

How to test it with MiniTest so as not to write all 100 values ​​without decreasing n?

Answer 1

This is not a true Ruby Way FizzBuzz, it could look something like this:

puts ((1..100).map do |i|
  str = ''
  str << 'Fizz' if i % 3 == 0
  str << 'Buzz' if i % 5 == 0
  str.empty? ? i : str
end)

And for tests, you don't have to test each of the 100 values. The minimum, maximum and the test for each branch in the if are enough. It is better to avoid while and enter the required number of iterations into the method through a parameter, and then follow it through each/map.