add a (test) spec for the entity conversion module -- it checks the behavior on named html entities and (decimal and hexadecimal) numeric html entities

tests/Text/Taggy/EntitiesSpec.hs

@@ -0,0 +1,32 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Text.Taggy.EntitiesSpec where
+
+import Test.Hspec
+import Text.Taggy.Entities
+
+spec :: Spec
+spec = do
+  describe "convertEntities" $ do
+    it "converts " to \"" $
+      convertEntities """ 
+        `shouldBe` "\""
+
+    it "converts å to å" $
+      convertEntities "å"
+        `shouldBe` "å"
+
+    it "converts å to å" $
+      convertEntities "å"
+        `shouldBe` "å"
+
+    it "leaves alone &quot" $
+      convertEntities "&quot"
+        `shouldBe` "&quot"
+
+    it "leaves alone &#xe5" $
+      convertEntities "&#xe5"
+        `shouldBe` "&#xe5"
+
+    it "leaves alone &#229" $
+      convertEntities "&#229"
+        `shouldBe` "&#229"