14997bc1a3
For some reason cabal wasn't properly recompiling this file locally to pick up the introduction of an ambiguity error.
82 lines
3.2 KiB
Haskell
82 lines
3.2 KiB
Haskell
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module Xanthous.DataSpec (main, test) where
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--------------------------------------------------------------------------------
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import Test.Prelude hiding (Right, Left, Down)
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import Xanthous.Data
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import Data.Group
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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 = testGroup "Xanthous.Data"
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[ testGroup "Position"
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[ testBatch $ monoid @Position mempty
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, testProperty "group laws" $ \(pos :: Position) ->
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pos <> invert pos == mempty && invert pos <> pos == mempty
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, testGroup "stepTowards laws"
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[ testProperty "takes only one step" $ \src tgt ->
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src /= tgt ==>
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isUnit (src `diffPositions` (src `stepTowards` tgt))
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-- , testProperty "moves in the right direction" $ \src tgt ->
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-- stepTowards src tgt == move (directionOf src tgt) src
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]
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, testProperty "directionOf laws" $ \pos dir ->
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directionOf pos (move dir pos) == dir
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, testProperty "diffPositions is add inverse" $ \(pos₁ :: Position) pos₂ ->
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diffPositions pos₁ pos₂ == addPositions pos₁ (invert pos₂)
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, testGroup "isUnit"
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[ testProperty "double direction is never unit" $ \dir ->
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not . isUnit $ move dir (asPosition dir)
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, testCase "examples" $ do
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isUnit (Position @Int 1 1) @? "not . isUnit $ Position 1 1"
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isUnit (Position @Int 0 (-1)) @? "not . isUnit $ Position 0 (-1)"
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(not . isUnit) (Position @Int 1 13) @? "isUnit $ Position 1 13"
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]
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]
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, testGroup "Direction"
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[ testProperty "opposite is involutive" $ \(dir :: Direction) ->
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opposite (opposite dir) == dir
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, testProperty "opposite provides inverse" $ \dir ->
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invert (asPosition dir) === asPosition (opposite dir)
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, testProperty "asPosition isUnit" $ \dir ->
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dir /= Here ==> isUnit (asPosition dir)
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, testGroup "Move"
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[ testCase "Up" $ move Up mempty @?= Position 0 (-1)
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, testCase "Down" $ move Down mempty @?= Position 0 1
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, testCase "Left" $ move Left mempty @?= Position (-1) 0
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, testCase "Right" $ move Right mempty @?= Position 1 0
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, testCase "UpLeft" $ move UpLeft mempty @?= Position (-1) (-1)
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, testCase "UpRight" $ move UpRight mempty @?= Position 1 (-1)
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, testCase "DownLeft" $ move DownLeft mempty @?= Position (-1) 1
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, testCase "DownRight" $ move DownRight mempty @?= Position 1 1
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]
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]
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, testGroup "Corner"
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[ testGroup "instance Opposite"
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[ testProperty "involutive" $ \(corner :: Corner) ->
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opposite (opposite corner) === corner
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]
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]
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, testGroup "Edge"
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[ testGroup "instance Opposite"
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[ testProperty "involutive" $ \(edge :: Edge) ->
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opposite (opposite edge) === edge
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]
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]
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, testGroup "Box"
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[ testGroup "boxIntersects"
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[ testProperty "True" $ \dims ->
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boxIntersects (Box @Word (V2 1 1) (V2 2 2))
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(Box (V2 2 2) dims)
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, testProperty "False" $ \dims ->
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not $ boxIntersects (Box @Word (V2 1 1) (V2 2 2))
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(Box (V2 4 2) dims)
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]
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]
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]
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