Add remaining haskell book exercises

Haskell-book/24/ParserExercises/test/LogTest/Main.hs

@@ -0,0 +1,14 @@
+module Main where
+
+import LogParser
+import Test.QuickCheck
+import Text.Trifecta
+
+maybeSuccess :: Text.Trifecta.Result a -> Maybe a
+maybeSuccess (Text.Trifecta.Success a) = Just a
+maybeSuccess _ = Nothing
+
+main :: IO ()
+main = do
+    quickCheck ((\s -> (maybeSuccess $ parseString parseStatement mempty (show s)) == (Just s)) :: Statement -> Bool)
+    quickCheck ((\s -> (maybeSuccess $ parseString parseLogEntry mempty (show s)) == (Just s)) :: LogEntry -> Bool)