Replace Temp with Query.

replace-temp-with-query/lib/after.rb

@@ -0,0 +1,16 @@
+class Cuboid
+  attr_reader :length, :width, :height
+  def initialize length, width, height
+    @length = length
+    @width  = width
+    @height = height
+  end
+
+  def volume
+    area * height
+  end
+
+  def area
+    length * width
+  end
+end

replace-temp-with-query/lib/before.rb

@@ -0,0 +1,13 @@
+class Cuboid
+  attr_reader :length, :width, :height
+  def initialize length, width, height
+    @length = length
+    @width  = width
+    @height = height
+  end
+
+  def volume
+    area = length * width
+    area * height
+  end
+end

replace-temp-with-query/test/test.rb

@@ -3,3 +3,9 @@
 
 require 'before' if ENV["BEFORE"]
 require 'after' unless ENV["BEFORE"]
+
+describe Cuboid do
+  it "has a volume" do
+    Cuboid.new(2,3,4).volume.must_equal 24
+  end
+end