1# Each new term in the Fibonacci sequence is generated by adding the previous two terms. 
 2## By starting with 1 and 2, the first 10 terms will be:
 3#
 4## 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
 5#
 6## By considering the terms in the Fibonacci sequence whose values do not exceed
 7## four million, find the sum of the even-valued terms.
 8
 9class Fibonacci
10end
11
12describe "fibonacci" do
13  subject { Fibonacci.new }
14
15  xit 'returns the sum of the even valued terms' do
16    items = subject.take_while { |n| n < 4_000_000 }.find_all(&:even?)
17    result = items.inject(0) { |memo, x| memo + x }
18    expect(result).to eql(4613732)
19  end
20end