FizzBuzz Minitest Exercise

FizzBuzz Minitest Exercise

# I wanted learn about Minitest and I saw a cool youtube video about creating a FizzBuzz class that required Minitest. It seemed like a # great introduction so I decided to try it for myself and do my own implementation here

#1st mkdir fizzbuzz to create folder/directory

#This is the main class which we are testing, put this code in a 'fizzbuzz.rb' ruby file

class FizzBuzz 

	def print(num)
		if num.respond_to?(:each)
			final_arr = []
			num.each do |x|
				final_arr << test(x)
			end
		final_arr
		else
			test(num)
		end
	end	


	private
	def test(num)
		raise ArgumentError unless num > 0
		raise ArgumentError, "Integers only" unless num.is_a? Integer

		if num % 15 == 0 
			return "FizzBuzz"
		elsif num % 5 == 0
			return "Buzz"
		elsif num % 3 == 0
			return "Fizz"
		else
			return num.to_s
		end
	end

end


# below is the content of the spec file with minitest, put this is a ruby file like 'spec.rb'

require 'minitest/autorun'
require_relative 'fizzbuzz'

describe "FizzBuzz" do
	
  before do 
    @fb = FizzBuzz.new
    @number = 15*rand(1..100) + 1
  end

  it "return Fizz for multiples of 3" do
  	@fb.print(3*@number).must_equal "Fizz"
  end

  it "returns Buzz for multiples of 5" do
  	@fb.print(5*@number).must_equal "Buzz"
  end

  it "returns FizzBuzz for multiples of 15" do	
  	@fb.print(15*@number).must_equal "FizzBuzz"
  end

  it "returns the number as a string for all non FizzBuzz numbers" do
  	@fb.print(@number).must_equal @number.to_s
  end

  it "does not return FizzBuzz for a non multiple of 15" do
  	@fb.print(@number).wont_equal "FizzBuzz"
  end

  it "returns an array when we give an array object as an argument" do
  	@fb.print(1..5).must_be_instance_of Array
  end

  it "raises an error if the number is negative" do
  	proc {@fb.print(-1)}.must_raise ArgumentError 
  end

  it "raises an error if the argument is 0" do
  	proc {@fb.print(0)}.must_raise ArgumentError
  end

  it "raises an error if the number is not an integer" do
  	proc {@fb.print(3.5)}.must_raise ArgumentError
  end

end


#To run the test suite just go to the file directory which in my case was a fizzbuzz folder(mkdir fizzbuzz) in your command line and run 'ruby spec.rb' file without the quotes.