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{-# OPTIONS_GHC -fno-warn-orphans #-}
module Text.Digestive.Form.Encoding.QTests
   ( tests
   ) where


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import           Data.Monoid
import           Test.Framework
import           Test.Framework.Providers.QuickCheck2
import           Test.QuickCheck


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import           Text.Digestive.Form.Encoding


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-- Monoid properties
tests :: Test
tests = testGroup "Text.Digestive.Types.Tests"
    [
         testProperty "enctype monoid - Left identity" prop_idl
       , testProperty "enctype monoid - Right identity" prop_idr
       , testProperty "enctype monoid - Associativity" prop_assoc
    ]


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prop_idl :: FormEncType -> Bool
prop_idl a = a `mappend` mempty == a


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prop_idr :: FormEncType -> Bool
prop_idr a = mempty `mappend` a == a


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prop_assoc :: FormEncType -> FormEncType -> FormEncType -> Bool
prop_assoc a b c = lhs == rhs
   where lhs = a `mappend` b `mappend` c
         rhs = a `mappend` (b `mappend` c)


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instance Arbitrary FormEncType
   where arbitrary = elements [MultiPart, UrlEncoded]