rpsec.rb

*test_spec.rb
require 'test.rb'
describe "Result" do

	it "should be a 5 digit number"
		expect(solution.split(//).size).eql? 5
	end

	it "should be in included in the number given"
		expect(givenNumber).include? solution
	end

	it "should be the largest 5 digit number within the series"
		expect(numberCheck).eql? true
	end

end

-----

*test.rb

def givenNumber
	rand(100000..100000)
end

def solution
  digits = givenNumber
  digits = digits.to_s.split(//)
  mSize, allResult = digits.size, []
  digits.each_with_index do |x, index|
  		temp = []
	  	index.to_i.upto(mSize) do |y|
	  			temp << digits[y].to_i
	  			if temp.size.eql? 5
	  				allResult << temp.join("")
	  				temp = []
	  				break	  				
	  			end
	  	end
 	end
  allResult.max
end

def numberCheck
  digits = givenNumber
  digits = digits.to_s.split(//)
  mSize, allResult = digits.size, []
  digits.each_with_index do |x, index|
  		temp = []
	  	index.to_i.upto(mSize) do |y|
	  			temp << digits[y].to_i
	  			if temp.size.eql? 5
	  				allResult << temp.join("")
	  				temp = []
	  				break	  				
	  			end
	  	end
 	end
  #largestNumber = allResult.sort.last
  largestNumber = allResult.max
  allResult.each do |x|
  	 x > largestNumber ? (return false) : (return true) 
  end
end