Adding feature and step defs files.

features/animal.feature

@@ -1 +1,16 @@
 #Create your feature here
+
+Feature: Animal
+  As a hotel manager
+  I want to know the name, type, and age of all animals
+
+  Scenario Outline: animals checking into the hotel
+    Given a <type> named <name> that is <age> years old
+    When the <type> <verb> older than 3
+    Then the <type> <verb> old
+
+    Examples:
+      | name  | type   | age | verb  |
+      | Proxy | dog    | 2   | isn't |
+      | Rover | dog    | 4   | is    |
+      | Rex   | lizard | 3   | isn't |

features/step_definitions/animal_steps.rb

@@ -1 +1,18 @@
 #Delete this comment, here is where you should write your step defs
+
+Given(/^a (\w+) named (\w+) that is (\d+) years old$/) do |type, name, age|
+  @animal = Animal.new(name, type, age.to_i)
+end
+
+When(/^the (\w+) ([\w']+) older than (\d+)$/) do |type, verb, age|
+  is_old = (verb == "is")
+
+  expect(@animal.old?).to eq(is_old)
+end
+
+Then(/^the (\w+) ([\w']+) old$/) do |type, verb|
+  is_old = (verb == "is")
+
+  expect(@animal.type).to eq(type)
+  expect(@animal.old?).to eq(is_old)
+end