f701a0be40
Make the setter for the atPosition lens preserve entityIDs for already-existing entities at the position, so that when we plop something in the same tile as the character the character's entity ID doesn't disappear.
69 lines
3 KiB
Haskell
69 lines
3 KiB
Haskell
{-# LANGUAGE ApplicativeDo #-}
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--------------------------------------------------------------------------------
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module Xanthous.Data.EntityMapSpec where
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--------------------------------------------------------------------------------
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import Test.Prelude
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--------------------------------------------------------------------------------
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import qualified Data.Aeson as JSON
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--------------------------------------------------------------------------------
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import Xanthous.Data.EntityMap
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import Xanthous.Data (Positioned(..))
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--------------------------------------------------------------------------------
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main :: IO ()
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main = defaultMain test
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test :: TestTree
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test = localOption (QuickCheckTests 20)
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$ testGroup "Xanthous.Data.EntityMap"
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[ testBatch $ monoid @(EntityMap Int) mempty
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, testGroup "Deduplicate"
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[ testGroup "Semigroup laws"
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[ testProperty "associative" $ \(a :: Deduplicate (EntityMap Int)) b c ->
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a <> (b <> c) === (a <> b) <> c
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]
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]
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, testGroup "Eq laws"
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[ testProperty "reflexivity" $ \(em :: EntityMap Int) ->
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em == em
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, testProperty "symmetric" $ \(em₁ :: EntityMap Int) em₂ ->
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(em₁ == em₂) == (em₂ == em₁)
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, testProperty "transitive" $ \(em₁ :: EntityMap Int) em₂ em₃ ->
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if (em₁ == em₂ && em₂ == em₃)
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then (em₁ == em₃)
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else True
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]
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, testGroup "JSON encoding/decoding"
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[ testProperty "round-trips" $ \(em :: EntityMap Int) ->
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let em' = JSON.decode (JSON.encode em)
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in counterexample (show (em' ^? _Just . lastID, em ^. lastID
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, em' ^? _Just . byID == em ^. byID . re _Just
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, em' ^? _Just . byPosition == em ^. byPosition . re _Just
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, em' ^? _Just . _EntityMap == em ^. _EntityMap . re _Just
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))
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$ em' === Just em
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, testProperty "Preserves IDs" $ \(em :: EntityMap Int) ->
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let Just em' = JSON.decode $ JSON.encode em
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in toEIDsAndPositioned em' === toEIDsAndPositioned em
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]
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, localOption (QuickCheckTests 50)
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$ testGroup "atPosition"
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[ testProperty "setget" $ \pos (em :: EntityMap Int) es ->
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view (atPosition pos) (set (atPosition pos) es em) === es
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, testProperty "getset" $ \pos (em :: EntityMap Int) ->
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set (atPosition pos) (view (atPosition pos) em) em === em
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, testProperty "setset" $ \pos (em :: EntityMap Int) es ->
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(set (atPosition pos) es . set (atPosition pos) es) em
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===
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set (atPosition pos) es em
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-- testProperty "lens laws" $ \pos -> isLens $ atPosition @Int pos
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, testProperty "preserves IDs" $ \(em :: EntityMap Int) e1 e2 p ->
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let (eid, em') = insertAtReturningID p e1 em
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em'' = em' & atPosition p %~ (e2 <|)
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in
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counterexample ("em': " <> show em')
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. counterexample ("em'': " <> show em'')
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$ em'' ^. at eid === Just (Positioned p e1)
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]
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]
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