052bc8455a
Add a drop command, bound to 'd', which prompts the character for an item in their inventory, removes it from the inventory, and places it on the ground. Along the way I had to fix a bug in the `EntityMap.atPosition` lens, which was always appending to the existing entities at the position on set, without removing the entities that were already there - the rabbit hole of quickchecking the lens laws here also lead to replacing the target of this lens with a newtype called `VectorBag`, which ignores order (since the entitymap makes no guarantees about order of entities at a given position).
53 lines
2.2 KiB
Haskell
53 lines
2.2 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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import Control.Lens.Properties
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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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--------------------------------------------------------------------------------
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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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, testGroup "atPosition"
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[ testProperty "lens laws" $ \pos -> isLens $ atPosition @Int pos
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]
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]
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