Caffeine Challenge Done

caffeine_tests.rb

@@ -15,14 +15,21 @@ def test_humans_need_coffee
     assert matt.needs_coffee?
   end
 
+  def test_humans_can_get_coffee
+    katie = Human.new "Katie"
+    refute katie.has_coffee?
+    katie.buy Coffee.new("Latte")
+    assert katie.has_coffee?
+  end
+
   def test_humans_can_drink_coffee
     mallory = Human.new "Mallory"
     tsmf = Coffee.new "Triple Shot Mocha Frappuccino"
     assert tsmf.full?
 
     mallory.buy tsmf
     mallory.drink!
-    assert_within_epsilon mallory.alertness, 0.33, 0.1
+    assert_in_epsilon mallory.alertness, 0.33, 0.1
     refute tsmf.full?
     refute tsmf.empty?
   end

coffee.rb

@@ -1,3 +1,17 @@
 class Coffee
-  # Add code here
-end
+  def initialize name
+  	@sips = 3
+  end
+
+  def full?
+  	@sips == 3
+  end
+
+  def empty?
+  	@sips.zero?
+  end
+
+  def take_sip
+  	@sips -= 1
+  end
+end

human.rb

@@ -1,3 +1,30 @@
 class Human
-  # Add code here
+	def initialize name
+		@alertness = 0
+	end
+
+	def has_coffee?
+		if @my_coffee.nil?
+			false
+		else
+			true
+		end
+	end
+
+	def needs_coffee?
+		!has_coffee?
+	end
+
+	def alertness
+		@alertness
+	end
+
+	def buy coffee
+		@my_coffee = coffee
+	end
+
+	def drink!
+		@alertness += 0.33
+		@my_coffee.take_sip
+	end
 end