mtlstats/test/UtilSpec.hs
Jonathan Lamothe 3d705c4e6d implemented nth
2019-09-18 02:45:20 -04:00

45 lines
1.2 KiB
Haskell

{-
mtlstats
Copyright (C) 2019 Rhéal Lamothe
<rheal.lamothe@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
-}
module UtilSpec (spec) where
import Test.Hspec (Spec, context, describe, it, shouldBe)
import Mtlstats.Util
spec :: Spec
spec = describe "Mtlstats.Util"
nthSpec
nthSpec :: Spec
nthSpec = describe "nth" $ mapM_
(\(n, expected) -> context (show n) $
it ("should be " ++ show expected) $ let
xs = ["foo", "bar", "baz"]
in nth n xs `shouldBe` expected)
-- index, expected
[ ( 0, Just "foo" )
, ( 1, Just "bar" )
, ( 2, Just "baz" )
, ( 3, Nothing )
, ( -1, Nothing )
]