text-builder-dev-0.3.4: test/TextBuilderDev/TastyExtras.hs

{-# OPTIONS_GHC -Wno-orphans #-}

module TextBuilderDev.TastyExtras where

import qualified Data.Text.Lazy.Builder as TextLazyBuilder
import Test.Tasty
import Test.Tasty.QuickCheck
import qualified TextBuilderDev as B
import Prelude hiding (choose)

-- * --

instance Arbitrary TextLazyBuilder.Builder where
  arbitrary =
    TextLazyBuilder.fromLazyText <$> arbitrary

-- * --

isomorphismLaws ::
  (B.IsomorphicToTextBuilder a, Eq a, Show a, Arbitrary a) =>
  String ->
  Proxy a ->
  TestTree
isomorphismLaws subject proxy =
  testGroup subject
    $ [ testProperty "fromTextBuilder . toTextBuilder == id"
          $ (===)
          <$> B.fromTextBuilder
          . B.toTextBuilder
          <*> flip asProxyTypeOf proxy,
        testProperty "toTextBuilder . fromTextBuilder == id"
          $ (===)
          <$> B.toTextBuilder
          . flip asProxyTypeOf proxy
          . B.fromTextBuilder
          <*> id
      ]