add fibonacci spec.

1 files changed, 20 insertions, 0 deletions

diff --git a/spec/fibonacci_spec.rb b/spec/fibonacci_spec.rb
new file mode 100644
index 0000000..c47707b
--- /dev/null
+++ b/spec/fibonacci_spec.rb
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+# Each new term in the Fibonacci sequence is generated by adding the previous two terms. 
+## By starting with 1 and 2, the first 10 terms will be:
+#
+## 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
+#
+## By considering the terms in the Fibonacci sequence whose values do not exceed
+## four million, find the sum of the even-valued terms.
+
+class Fibonacci
+end
+
+describe "problem two" do
+  subject { Fibonacci.new }
+
+  xit 'returns the sum of the even valued terms' do
+    items = subject.take_while { |n| n < 4_000_000 }.find_all(&:even?)
+    result = items.inject(0) { |memo, x| memo + x }
+    expect(result).to eql(4613732)
+  end
+end