1require 'spec_helper'
 2require 'prime'
 3
 4describe "problem ten" do
 5  #The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.
 6
 7  #Find the sum of all the primes below two million.
 8
 9  class SumOfPrime
10    attr_reader :limit
11
12    def initialize(limit)
13      @limit = limit
14    end
15
16    def sum
17      each.reduce(:+)
18    end
19
20    def each
21      Prime.each(limit)
22      #Enumerator.new do |yielder|
23        #2.upto(limit) do |n|
24          #yielder.yield(n) if prime?(n)
25        #end
26      #end
27    end
28
29    private
30
31    def prime?(number)
32      (2...number).each do |n|
33        return false if number % n == 0
34      end
35      true
36    end
37  end
38
39  it 'returns the sum of the primes below 10' do
40    expect(SumOfPrime.new(10).sum).to eql(17)
41  end
42
43  it 'returns thesum of the primes below 2_000_000' do
44    expect(SumOfPrime.new(2_000_000).sum).to eql(142_913_828_922)
45  end
46end