open Stdune
open Dune_tests_common

let () = init ()
let extension s = print (Pp.text (Filename.extension s))

let%expect_test _ =
  extension "toto.titi";
  [%expect
    {|
.titi
|}]
;;

let%expect_test _ =
  extension "toto.";
  [%expect
    {|
.
|}]
;;

let%expect_test _ =
  extension ".";
  [%expect {| |}]
;;

let%expect_test _ =
  extension ".titi";
  [%expect {| |}]
;;

let%expect_test _ =
  extension ".a";
  [%expect {| |}]
;;

let%expect_test _ =
  extension "a.";
  [%expect
    {|
.
|}]
;;

let%expect_test _ =
  extension "a.a";
  [%expect
    {|
.a
|}]
;;

let%expect_test _ =
  extension "truc/a.a";
  [%expect
    {|
.a
|}]
;;

let%expect_test _ =
  extension "truc/.a";
  [%expect {| |}]
;;

let%expect_test _ =
  extension "truc/a.";
  [%expect
    {|
.
|}]
;;