added doctest

test/DocSpec.hs

@@ -0,0 +1,21 @@
+module Main where
+
+import Data.List (isSuffixOf)
+import System.FilePath.Find
+import Test.DocTest
+
+main :: IO ()
+-- main = find always ((extension ==? ".hs") &&? exceptFiles ["Data/Convertible/Base.hs","Data/Convertible/Utils.hs","Data/Convertible/Instances/Num.hs"]) "src" >>= doctest
+main =
+  find
+    always
+    ((extension ==? ".hs") &&? exceptFiles ["Dataset.hs", "Test.hs", "Main.hs"])
+    "src" >>=
+  doctest
+
+exceptFiles :: Foldable t => t String -> FindClause Bool
+exceptFiles mdls
+      -- let excludes = liftOp (\fp mdls -> not $ any (\mdl -> isSuffixOf mdl (traceShowId fp)) mdls)
+ =
+  let excludes = liftOp (\fp modules -> not $ any (`isSuffixOf` fp) modules)
+   in filePath `excludes` mdls