6ab7cdfdc9
Previously the isUnit function was falsely returning `True` for positions that were one tile off in *either* direction from the character, when it should've been *both*. Oops.
56 lines
2.3 KiB
Haskell
56 lines
2.3 KiB
Haskell
-- |
|
|
|
|
module Xanthous.DataSpec (main, test) where
|
|
|
|
import Test.Prelude hiding (Right, Left, Down)
|
|
import Xanthous.Data
|
|
import Data.Group
|
|
|
|
main :: IO ()
|
|
main = defaultMain test
|
|
|
|
test :: TestTree
|
|
test = testGroup "Xanthous.Data"
|
|
[ testGroup "Position"
|
|
[ testBatch $ monoid @Position mempty
|
|
, testProperty "group laws" $ \(pos :: Position) ->
|
|
pos <> invert pos == mempty && invert pos <> pos == mempty
|
|
, testGroup "stepTowards laws"
|
|
[ testProperty "takes only one step" $ \src tgt ->
|
|
src /= tgt ==>
|
|
isUnit (src `diffPositions` (src `stepTowards` tgt))
|
|
-- , testProperty "moves in the right direction" $ \src tgt ->
|
|
-- stepTowards src tgt == move (directionOf src tgt) src
|
|
]
|
|
, testProperty "directionOf laws" $ \pos dir ->
|
|
directionOf pos (move dir pos) == dir
|
|
, testProperty "diffPositions is add inverse" $ \pos₁ pos₂ ->
|
|
diffPositions pos₁ pos₂ == addPositions pos₁ (invert pos₂)
|
|
, testGroup "isUnit"
|
|
[ testProperty "double direction is never unit" $ \dir ->
|
|
not . isUnit $ move dir (asPosition dir)
|
|
, testCase "examples" $ do
|
|
isUnit (Position 1 1) @? "not . isUnit $ Position 1 1"
|
|
isUnit (Position 0 (-1)) @? "not . isUnit $ Position 0 (-1)"
|
|
(not . isUnit) (Position 1 13) @? "isUnit $ Position 1 13"
|
|
]
|
|
]
|
|
, testGroup "Direction"
|
|
[ testProperty "opposite is involutive" $ \(dir :: Direction) ->
|
|
opposite (opposite dir) == dir
|
|
, testProperty "opposite provides inverse" $ \dir ->
|
|
invert (asPosition dir) == asPosition (opposite dir)
|
|
, testProperty "asPosition isUnit" $ \dir ->
|
|
dir /= Here ==> isUnit (asPosition dir)
|
|
, testGroup "Move"
|
|
[ testCase "Up" $ move Up mempty @?= Position 0 (-1)
|
|
, testCase "Down" $ move Down mempty @?= Position 0 1
|
|
, testCase "Left" $ move Left mempty @?= Position (-1) 0
|
|
, testCase "Right" $ move Right mempty @?= Position 1 0
|
|
, testCase "UpLeft" $ move UpLeft mempty @?= Position (-1) (-1)
|
|
, testCase "UpRight" $ move UpRight mempty @?= Position 1 (-1)
|
|
, testCase "DownLeft" $ move DownLeft mempty @?= Position (-1) 1
|
|
, testCase "DownRight" $ move DownRight mempty @?= Position 1 1
|
|
]
|
|
]
|
|
]
|