Extracts normalize_url to utility function and adds doctests

lib/thesis/controller.ex

@@ -90,9 +90,7 @@ defmodule Thesis.Controller.Plug do
   end
 
   def call(conn, _opts) do
-    url = conn.request_path
-          |> String.replace(~r/(?<=[^:])(\/\/)/, conn.request_path, "/") # Strip double slashes
-          |> String.replace(~r/\/$/, "") # Strip trailing slash
+    url = Thesis.Utilities.normalize_url(conn.request_path)
     current_page = store.page(url)
     page_contents = store.page_contents(current_page)
 

lib/thesis/utilities.ex

@@ -3,6 +3,7 @@ defmodule Thesis.Utilities do
   Module that provides helper functions.
   """
 
+
   def parameterize(str) do
     str = Regex.replace(~r/[^a-z0-9\-\s\.]/i, str, "")
     Regex.split(~r/\%20|\s/, str)
@@ -18,4 +19,18 @@ defmodule Thesis.Utilities do
     |> String.downcase
     |> binary_part(0, length)
   end
+
+  @doc """
+  Takes a URL and strips unnecessary characters.
+
+      iex> Thesis.Utilities.normalize_url("http://infinite.red//ignite//foo")
+      "http://infinite.red/ignite/foo"
+      iex> Thesis.Utilities.normalize_url("https://infinite.red/ignite/foo/")
+      "https://infinite.red/ignite/foo"
+  """
+  def normalize_url(url) do
+    url
+    |> String.replace(~r/(?<=[^:])(\/\/)/, "/") # Strip double slashes
+    |> String.replace(~r/\/$/, "") # Strip trailing slash
+  end
 end

test/utilities_test.exs

@@ -0,0 +1,4 @@
+defmodule UtilitiesTest do
+  use ExUnit.Case
+  doctest Thesis.Utilities
+end