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{- arch-tag: Data.Either.Utils tests
Copyright (C) 2004-2011 John Goerzen <jgoerzen@complete.org>
All rights reserved.
For license and copyright information, see the file LICENSE
-}
{-# LANGUAGE CPP #-}
module Eithertest(tests) where
import Control.Exception
#if !MIN_VERSION_base(4,7,0)
import Control.Exception.ErrorCall.EqInstance
#endif
import Data.Either.Utils
import Test.HUnit
import TestUtils
test_maybeToEither =
let f msg inp exp = TestLabel msg $ TestCase $ assertEqual "" exp inp in
[
f "Nothing" (maybeToEither "error" (Nothing::Maybe String))
(Left "error"),
f "Nothing diff types" (maybeToEither "error" (Nothing::Maybe Int))
(Left "error"),
f "Just" (maybeToEither "error" (Just "good")) (Right "good"),
f "Diff types" (maybeToEither "error" (Just (5::Int)))
(Right (5::Int))
]
test_forceEither =
let f msg inp exp = TestLabel msg $ TestCase $ assertEqual "" exp inp in
[
f "Right" (forceEither ((Right "foo")::Either Int String)) "foo",
TestLabel "Left" $ TestCase $ assertRaises ((== "\"wrong\"") . errorCallMsg) ("" @=? forceEither (Left "wrong"))
]
tests = TestList [TestLabel "test_maybeToEither" (TestList test_maybeToEither),
TestLabel "test_forceEither" (TestList test_forceEither)
]
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