Update to panda/eagle/tiger

Author: jwo

README.md

@@ -3,21 +3,28 @@ Episode 1 - Lions, Pandas and Zookeepers
 
 An accurate simulation of zookeepers feeding Lions and Pandas
 
-Your Assignment
+Panda Level
 ---------------
 
 1. Create a human that likes bacon and tacos, but not bamboo
 2. (Using TDD [write tests first])
 
-Extra Credit
-------------
-
-1. Extract `Food` into a class, rather than a symbol
-2. Create a FoodBarge that can be called like:
+Tiger Level
+---------------
+1. Create a FoodBarge that can be called like:
+2. Test that when the zookeepers gets food for the panda, 
+the panda will eat it
 
 ```
-food = @foodbarge.food_for(panda)
+food = foodbarge.food_for(panda)
 panda.feed(food)
 ```
 
+Eagle Level
+----------
+
+1. Extract `Food` into a class, rather than a symbol
+2. Create separate Tacos, Wildebeests, etc classes for each food
+2. Rather than comparing Tacos.new, implement the `==` method so you can do `Tacos.new == Tacos.new`
+
 Copyright: Jesse Wolgamott, MIT License (See LICENSE)

zoo.rb

@@ -13,7 +13,7 @@ def eat(food)
 	end
 
 	def likes?(food)
-		acceptable_food.include?(food.to_sym)
+		acceptable_food.include?(food)
 	end
 
 	def acceptable_food
@@ -31,7 +31,7 @@ class Panda
 	include Animal
 
 	def acceptable_food
-		[:bamboo]
+		[Bamboo.new]
 	end
 
 	def full?
@@ -44,14 +44,28 @@ class Lion
 	include Animal
 
 	def acceptable_food
-		[:wildebeests, :zeebras]
+		[Wildebeests.new, Zeebras.new]
 	end
 
 	def full?
 		@meals > 10
 	end
 end
 
+
+class Food
+
+	def ==(other)
+		other.is_a? self.class
+	end
+
+end
+
+class Tacos < Food; end
+class Wildebeests < Food; end
+class Zeebras < Food; end
+class Bamboo < Food; end
+
 class Zookeeper
 	def feed(args={})
 		food = args.fetch(:food)

zoo_spec.rb

@@ -2,61 +2,66 @@
 require "./zoo"
 require "rspec"
 
-describe Panda do
+class Grasshoppers < Food; end
+class Salad < Food; end
 
-	it "should like bamboo" do
-		Panda.new.likes?(:bamboo).should eq(true)
+describe Tacos do
+	it "should know all tacos are equal" do
+		(Tacos.new == Tacos.new).should be_true
 	end
+end
 
-	it "should like bamboo as a string" do
-		Panda.new.likes?("bamboo").should eq(true)
+describe Panda do
+
+	it "should like bamboo" do
+		Panda.new.likes?(Bamboo.new).should eq(true)
 	end
 
 	it "should not like grasshoppers" do
-		Panda.new.likes?(:grasshoppers).should eq(false)
+		Panda.new.likes?(Grasshoppers.new).should eq(false)
 	end
 
 	it "should be able to eat the food" do
-		Panda.new.eat(:bamboo).should be_true
+		Panda.new.eat(Bamboo.new).should be_true
 	end
 
 	it "should be full after eating 30 bamboo" do
 		panda = Panda.new
 		31.times do
-			panda.eat(:bamboo)	
+			panda.eat(Bamboo.new)	
 		end
 		panda.should be_full
 	end
 
 	it "should not be full after 1" do
 		panda = Panda.new
-		panda.eat(:bamboo)	
+		panda.eat(Bamboo.new)	
 		panda.should_not be_full
 	end
 end
 
 describe Lion do
 	it "should like wildebeests" do
-		Lion.new.likes?(:wildebeests).should eq(true)
+		Lion.new.likes?(Wildebeests.new).should eq(true)
 	end
 
 	it "should like zeebras" do
-		Lion.new.likes?(:zeebras).should eq(true)
+		Lion.new.likes?(Zeebras.new).should eq(true)
 	end
 
 	it "should not like salad" do
-		Lion.new.likes?(:salad).should eq(false)
+		Lion.new.likes?(Salad.new).should eq(false)
 	end
 
 	it "should take 11 meals to be full" do
 		lion = Lion.new
-		lion.eat(:zeebras)
+		lion.eat(Zeebras.new)
 		lion.should_not be_full
 	end
 	it "should take 11 meals to be full" do
 		lion = Lion.new
 		11.times do
-			lion.eat(:zeebras)
+			lion.eat(Zeebras.new)
 		end
 		lion.should be_full
 	end