Clean up tests a bit.

spec/fistface_spec.rb

@@ -9,11 +9,13 @@ def app
 
   context "when I GET a font stylesheet by convention of font-name.css" do
     before do
-      Timecop.freeze(Date.parse("January 1, 2011"))
+      Timecop.freeze(first_of_january)
 
       get "chunk.css"
     end
 
+    after { Timecop.return }
+
     it "responds with HTTP status OK" do
       last_response.should be_ok
     end
@@ -41,11 +43,13 @@ def app
 
   context "when I GET a font file by convention of font-name/font-name.ttf" do
     before do
-      Timecop.freeze(Date.parse("January 1, 2011"))
+      Timecop.freeze(first_of_january)
 
       get "chunk/chunk.ttf"
     end
 
+    after { Timecop.return }
+
     it "responds with HTTP status OK" do
       last_response.should be_ok
     end
@@ -98,4 +102,8 @@ def app
       last_response.content_type.should == 'image/svg+xml'
     end
   end
+
+  def first_of_january
+    Date.parse("January 1, 2011")
+  end
 end