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module Language.Haskell.Stylish.Step.Squash.Tests
    ( tests
    ) where


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import           Test.Framework                            (Test, testGroup)
import           Test.Framework.Providers.HUnit            (testCase)
import           Test.HUnit                                (Assertion, (@=?))


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import           Language.Haskell.Stylish.Step.Squash
import           Language.Haskell.Stylish.Tests.Util


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tests :: Test
tests = testGroup "Language.Haskell.Stylish.Step.SimpleSquash.Tests"
    [ testCase "case 01" case01
    , testCase "case 02" case02
    , testCase "case 03" case03
    , testCase "case 04" case04
    , testCase "case 05" case05
    ]


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case01 :: Assertion
case01 = expected @=? testStep step input
  where
    input = unlines
        [ "data Foo = Foo"
        , "    { foo    :: Int"
        , "    , barqux :: String"
        , "    } deriving (Show)"
        ]

    expected = unlines
        [ "data Foo = Foo"
        , "    { foo :: Int"
        , "    , barqux :: String"
        , "    } deriving (Show)"
        ]


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case02 :: Assertion
case02 = expected @=? testStep step input
  where
    input = unlines
        [ "data Foo = Foo"
        , "    { fooqux"
        , "    , bar    :: String"
        , "    } deriving (Show)"
        ]

    expected = unlines
        [ "data Foo = Foo"
        , "    { fooqux"
        , "    , bar :: String"
        , "    } deriving (Show)"
        ]


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case03 :: Assertion
case03 = expected @=? testStep step input
  where
    input = unlines
        [ "maybe y0 f mx ="
        , "    case mx of"
        , "        Nothing -> y0"
        , "        Just x  -> f x"
        ]

    expected = unlines
        [ "maybe y0 f mx ="
        , "    case mx of"
        , "        Nothing -> y0"
        , "        Just x -> f x"
        ]


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case04 :: Assertion
case04 = expected @=? testStep step input
  where
    input = unlines
        [ "maybe y0 f mx ="
        , "    case mx of"
        , "        Nothing ->"
        , "            y0"
        , "        Just x  ->"
        , "            f x"
        ]

    expected = unlines
        [ "maybe y0 f mx ="
        , "    case mx of"
        , "        Nothing ->"
        , "            y0"
        , "        Just x ->"
        , "            f x"
        ]


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case05 :: Assertion
case05 = expected @=? testStep step input
  where
    input = unlines
        [ "maybe y0 _ Nothing  = y"
        , "maybe _  f (Just x) = f x"
        ]

    expected = unlines
        [ "maybe y0 _ Nothing = y"
        , "maybe _  f (Just x) = f x"
        ]