Handling 's possessives. Fixes #31

Author: h4cc

lib/slugger.ex

@@ -37,6 +37,7 @@ defmodule Slugger do
   @spec slugify(text :: any, separator :: char) :: String.t
   def slugify(text, separator \\ @separator_char) do
     text
+    |> handle_possessives
     |> replace_special_chars
     |> remove_unwanted_chars(separator, ~r/([^A-Za-z0-9가-힣])+/)
   end
@@ -62,6 +63,7 @@ defmodule Slugger do
   @spec slugify_downcase(text :: any, separator :: char) :: String.t
   def slugify_downcase(text, separator \\ @separator_char) do
     text
+    |> handle_possessives
     |> replace_special_chars
     |> String.downcase
     |> remove_unwanted_chars(separator, ~r/([^a-z0-9가-힣])+/)
@@ -160,4 +162,10 @@ defmodule Slugger do
       |> Enum.take(range)
       |> Enum.any?(&(&1 == separator))
   end
+
+  # Handle "Sheep's Milk" so it will be "sheeps-milk" instead of "sheep-s-milk"
+  defp handle_possessives(text) do
+    String.replace(text, ~r/['’]s/u, "s")
+  end
+
 end

test/slugger_test.exs

@@ -39,7 +39,11 @@ defmodule SluggerTest do
     assert Slugger.slugify("baü") == "baue"
     assert Slugger.slugify("büaü") == "bueaue"
   end
-  
+
+  test "removing space between possessives" do
+    assert Slugger.slugify("Sheep's Milk") == "Sheeps-Milk"
+  end
+
   #--- slugify_downcase()
 
   test "string to lower" do
@@ -63,6 +67,10 @@ defmodule SluggerTest do
     assert Slugger.slugify_downcase("   A B  C  ", ?_) == "a_b_c"
   end
 
+  test "removing space between possessives lowercase" do
+    assert Slugger.slugify_downcase("Sheep's Milk") == "sheeps-milk"
+  end
+
   #--- Naughty strings
 
   test "naughty strings" do