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BalanceSpec.hs
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BalanceSpec.hs
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{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DerivingVia #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE NumericUnderscores #-}
{-# LANGUAGE OverloadedLabels #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
{- HLINT ignore "Use camelCase" -}
-- TODO: https://input-output.atlassian.net/browse/ADP-2841
{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
module Cardano.CoinSelection.BalanceSpec
( spec
, MockAssessTokenBundleSize
, MockComputeMinimumAdaQuantity
, MockComputeMinimumCost
, MockComputeSelectionLimit
, TestAddress (..)
, TestSelectionContext
, TestUTxO
, genMockAssessTokenBundleSize
, genMockComputeMinimumAdaQuantity
, genMockComputeMinimumCost
, genMockComputeSelectionLimit
, shrinkMockAssessTokenBundleSize
, shrinkMockComputeMinimumAdaQuantity
, shrinkMockComputeMinimumCost
, shrinkMockComputeSelectionLimit
, unMockAssessTokenBundleSize
, unMockComputeMinimumAdaQuantity
, unMockComputeMinimumCost
, unMockComputeSelectionLimit
) where
import Prelude
import Algebra.PartialOrd
( PartialOrd (..) )
import Cardano.CoinSelection.Balance
( AssetCount (..)
, BalanceInsufficientError (..)
, MakeChangeCriteria (..)
, PerformSelection
, RunSelectionParams (..)
, SelectionBalanceError (..)
, SelectionConstraints (..)
, SelectionLens (..)
, SelectionLimit
, SelectionLimitOf (..)
, SelectionLimitReachedError (..)
, SelectionParams
, SelectionParamsOf (..)
, SelectionResult
, SelectionResultOf (..)
, SelectionSkeleton (..)
, SelectionStrategy (..)
, UnableToConstructChangeError (..)
, addMintValueToChangeMaps
, addMintValuesToChangeMaps
, assetSelectionLens
, assignCoinsToChangeMaps
, coinSelectionLens
, collateNonUserSpecifiedAssetQuantities
, computeDeficitInOut
, computeUTxOBalanceAvailable
, computeUTxOBalanceRequired
, computeUTxOBalanceSufficiencyInfo
, groupByKey
, isUTxOBalanceSufficient
, makeChange
, makeChangeForCoin
, makeChangeForNonUserSpecifiedAsset
, makeChangeForNonUserSpecifiedAssets
, makeChangeForUserSpecifiedAsset
, mapMaybe
, performSelection
, performSelectionEmpty
, reduceSelectionLimitBy
, reduceTokenQuantities
, removeBurnValueFromChangeMaps
, removeBurnValuesFromChangeMaps
, runRoundRobin
, runSelection
, runSelectionNonEmptyWith
, runSelectionStep
, selectionDeltaAllAssets
, selectionHasValidSurplus
, selectionMinimumCost
, splitBundleIfAssetCountExcessive
, splitBundlesWithExcessiveAssetCounts
, splitBundlesWithExcessiveTokenQuantities
, ungroupByKey
)
import Cardano.CoinSelection.Balance.Gen
( genSelectionLimit
, genSelectionStrategy
, shrinkSelectionLimit
, shrinkSelectionStrategy
)
import Cardano.Numeric.Util
( inAscendingPartialOrder )
import Cardano.Wallet.Primitive.Types.Coin
( Coin (..) )
import Cardano.Wallet.Primitive.Types.Coin.Gen
( genCoin, genCoinPositive, shrinkCoin, shrinkCoinPositive )
import Cardano.Wallet.Primitive.Types.Hash
( Hash (..) )
import Cardano.Wallet.Primitive.Types.TokenBundle
( Flat (..), TokenBundle (..) )
import Cardano.Wallet.Primitive.Types.TokenBundle.Gen
( genTokenBundleSmallRangePositive
, shrinkTokenBundleSmallRange
, shrinkTokenBundleSmallRangePositive
)
import Cardano.Wallet.Primitive.Types.TokenMap
( AssetId (..), TokenMap )
import Cardano.Wallet.Primitive.Types.TokenMap.Gen
( genAssetId
, genAssetIdLargeRange
, genTokenMapSmallRange
, shrinkAssetId
, shrinkTokenMap
)
import Cardano.Wallet.Primitive.Types.TokenPolicy
( TokenName (..), TokenPolicyId (..) )
import Cardano.Wallet.Primitive.Types.TokenPolicy.Gen
( genTokenName )
import Cardano.Wallet.Primitive.Types.TokenQuantity
( TokenQuantity (..) )
import Cardano.Wallet.Primitive.Types.TokenQuantity.Gen
( genTokenQuantityPositive, shrinkTokenQuantityPositive )
import Cardano.Wallet.Primitive.Types.Tx.Constraints
( TokenBundleSizeAssessment (..), TokenBundleSizeAssessor (..) )
import Cardano.Wallet.Primitive.Types.UTxOIndex
( Asset (..), SelectionFilter (..), UTxOIndex )
import Cardano.Wallet.Primitive.Types.UTxOIndex.Gen
( genUTxOIndex, genUTxOIndexLarge, genUTxOIndexLargeN, shrinkUTxOIndex )
import Cardano.Wallet.Primitive.Types.UTxOSelection
( UTxOSelection, UTxOSelectionNonEmpty )
import Cardano.Wallet.Primitive.Types.UTxOSelection.Gen
( genUTxOSelection, shrinkUTxOSelection )
import Control.Monad
( forM_, replicateM )
import Data.Bifunctor
( bimap, second )
import Data.ByteString
( ByteString )
import Data.Function
( (&) )
import Data.Functor
( (<&>) )
import Data.Functor.Identity
( Identity (..) )
import Data.Generics.Internal.VL.Lens
( view )
import Data.Generics.Labels
()
import Data.IntCast
( intCast )
import Data.List.NonEmpty
( NonEmpty (..) )
import Data.Map.Strict
( Map )
import Data.Maybe
( fromMaybe, isJust, isNothing, listToMaybe )
import Data.Set
( Set )
import Data.Tuple
( swap )
import Data.Word
( Word64, Word8 )
import Fmt
( Buildable (..), blockListF, pretty )
import Generics.SOP
( NP (..) )
import GHC.Generics
( Generic )
import Numeric.Natural
( Natural )
import Safe
( tailMay )
import Test.Hspec
( Expectation, Spec, SpecWith, describe, it, shouldBe )
import Test.Hspec.Core.QuickCheck
( modifyMaxSuccess )
import Test.Hspec.Extra
( parallel )
import Test.QuickCheck
( Arbitrary (..)
, Blind (..)
, CoArbitrary (..)
, Fun
, Gen
, Negative (..)
, Positive (..)
, Property
, applyFun
, arbitraryBoundedEnum
, checkCoverage
, choose
, conjoin
, counterexample
, cover
, disjoin
, elements
, frequency
, generate
, genericShrink
, ioProperty
, label
, oneof
, property
, resize
, shrinkList
, shrinkMapBy
, sized
, suchThat
, tabulate
, withMaxSuccess
, (.&&.)
, (===)
, (==>)
)
import Test.QuickCheck.Classes
( eqLaws, ordLaws )
import Test.QuickCheck.Extra
( genFunction, genericRoundRobinShrink, report, verify, (<:>), (<@>) )
import Test.QuickCheck.Monadic
( PropertyM (..), assert, monadicIO, monitor, run )
import Test.QuickCheck.Quid
( Hexadecimal (..), Quid )
import Test.Utils.Laws
( testLawsMany )
import Test.Utils.Pretty
( Pretty (..) )
import qualified Cardano.CoinSelection.Context as SC
import qualified Cardano.Wallet.Primitive.Types.Coin as Coin
import qualified Cardano.Wallet.Primitive.Types.TokenBundle as TokenBundle
import qualified Cardano.Wallet.Primitive.Types.TokenMap as TokenMap
import qualified Cardano.Wallet.Primitive.Types.TokenQuantity as TokenQuantity
import qualified Cardano.Wallet.Primitive.Types.UTxOIndex as UTxOIndex
import qualified Cardano.Wallet.Primitive.Types.UTxOSelection as UTxOSelection
import qualified Data.Foldable as F
import qualified Data.List as L
import qualified Data.List.NonEmpty as NE
import qualified Data.Map.Strict as Map
import qualified Data.Maybe as Maybe
import qualified Data.Set as Set
spec :: Spec
spec = describe "Cardano.CoinSelection.BalanceSpec" $
modifyMaxSuccess (const 1_000) $ do
parallel $ describe "Coverage" $ do
it "prop_Small_UTxOIndex_coverage" $
property prop_Small_UTxOIndex_coverage
it "prop_Large_UTxOIndex_coverage" $
property prop_Large_UTxOIndex_coverage
parallel $ describe "Class instances respect laws" $ do
testLawsMany @(AssetCount TokenMap)
[ eqLaws
, ordLaws
]
testLawsMany @SelectionLimit
[ eqLaws
, ordLaws
]
parallel $ describe "Ordering of token maps" $ do
it "prop_AssetCount_TokenMap_placesEmptyMapsFirst" $
property prop_AssetCount_TokenMap_placesEmptyMapsFirst
parallel $ describe "Performing a selection" $ do
it "prop_performSelection_small" $
property prop_performSelection_small
it "prop_performSelection_large" $
property prop_performSelection_large
it "prop_performSelection_huge" $
property prop_performSelection_huge
parallel $ describe "Performing a selection with zero outputs" $ do
it "prop_performSelectionEmpty" $
property prop_performSelectionEmpty
parallel $ describe "Running a selection (without making change)" $ do
it "prop_runSelection_UTxO_empty" $
property prop_runSelection_UTxO_empty
it "prop_runSelection_UTxO_notEnough" $
property prop_runSelection_UTxO_notEnough
it "prop_runSelection_UTxO_exactlyEnough" $
property prop_runSelection_UTxO_exactlyEnough
it "prop_runSelection_UTxO_moreThanEnough" $
property prop_runSelection_UTxO_moreThanEnough
it "prop_runSelection_UTxO_muchMoreThanEnough" $
property prop_runSelection_UTxO_muchMoreThanEnough
parallel $ describe "Running a selection (non-empty)" $ do
it "prop_runSelectionNonEmpty" $
property prop_runSelectionNonEmpty
parallel $ describe "Running a selection step" $ do
it "prop_runSelectionStep_supplyExhausted" $
prop_runSelectionStep_supplyExhausted
& property
it "prop_runSelectionStep_notYetEnoughToSatisfyMinimum" $
prop_runSelectionStep_notYetEnoughToSatisfyMinimum
& property
it "prop_runSelectionStep_preciselyEnoughToSatisfyMinimum" $
prop_runSelectionStep_preciselyEnoughToSatisfyMinimum
& property
it "prop_runSelectionStep_exceedsMinimalTarget" $
prop_runSelectionStep_exceedsMinimalTarget
& property
it "prop_runSelectionStep_getsCloserToOptimalTargetButDoesNotExceedIt" $
prop_runSelectionStep_getsCloserToOptimalTargetButDoesNotExceedIt
& property
it "prop_runSelectionStep_getsCloserToOptimalTargetAndExceedsIt" $
prop_runSelectionStep_getsCloserToOptimalTargetAndExceedsIt
& property
it "prop_runSelectionStep_exceedsOptimalTargetAndGetsFurtherAway" $
prop_runSelectionStep_exceedsOptimalTargetAndGetsFurtherAway
& property
parallel $ describe "Behaviour of selection lenses" $ do
it "prop_assetSelectionLens_givesPriorityToSingletonAssets" $
property prop_assetSelectionLens_givesPriorityToSingletonAssets
it "prop_coinSelectionLens_givesPriorityToCoins" $
property prop_coinSelectionLens_givesPriorityToCoins
parallel $ describe "Boundary tests" $ do
unit_testBoundaries "Large token quantities"
boundaryTestMatrix_largeTokenQuantities
unit_testBoundaries "Large asset counts"
boundaryTestMatrix_largeAssetCounts
unit_testBoundaries "Comparison of selection strategies"
boundaryTestMatrix_selectionStrategies
parallel $ describe "Making change" $ do
it "prop_makeChange_identity" $
property prop_makeChange_identity
it "prop_makeChange_length" $
property prop_makeChange_length
it "prop_makeChange" $
property prop_makeChange
unitTests "makeChange"
unit_makeChange
parallel $ describe "Collating non-user specified asset quantities" $ do
it "prop_collateNonUserSpecifiedAssetQuantities" $
property prop_collateNonUserSpecifiedAssetQuantities
describe "unit_collateNonUserSpecifiedAssetQuantities"
unit_collateNonUserSpecifiedAssetQuantities
parallel $ describe "assignCoinsToChangeMaps" $ do
unitTests "assignCoinsToChangeMaps"
unit_assignCoinsToChangeMaps
parallel $ describe "Making change for coins" $ do
it "prop_makeChangeForCoin_sum" $
property prop_makeChangeForCoin_sum
it "prop_makeChangeForCoin_length" $
property prop_makeChangeForCoin_length
unitTests "makeChangeForCoin"
unit_makeChangeForCoin
parallel $ describe "Making change for one non-user-specified asset" $ do
it "prop_makeChangeForNonUserSpecifiedAsset_sum" $
property prop_makeChangeForNonUserSpecifiedAsset_sum
it "prop_makeChangeForNonUserSpecifiedAsset_order" $
property prop_makeChangeForNonUserSpecifiedAsset_order
it "prop_makeChangeForNonUserSpecifiedAsset_length" $
property prop_makeChangeForNonUserSpecifiedAsset_length
unitTests "makeChangeForNonUserSpecifiedAsset"
unit_makeChangeForNonUserSpecifiedAsset
parallel $ describe "Making change for many non-user-specified assets" $ do
it "prop_makeChangeForNonUserSpecifiedAssets_length" $
property prop_makeChangeForNonUserSpecifiedAssets_length
it "prop_makeChangeForNonUserSpecifiedAssets_order" $
property prop_makeChangeForNonUserSpecifiedAssets_order
it "prop_makeChangeForNonUserSpecifiedAssets_sum" $
property prop_makeChangeForNonUserSpecifiedAssets_sum
describe "unit_makeChangeForNonUserSpecifiedAssets"
unit_makeChangeForNonUserSpecifiedAssets
parallel $ describe "Making change for user-specified assets" $ do
it "prop_makeChangeForUserSpecifiedAsset_sum" $
property prop_makeChangeForUserSpecifiedAsset_sum
it "prop_makeChangeForUserSpecifiedAsset_length" $
property prop_makeChangeForUserSpecifiedAsset_length
unitTests "makeChangeForUserSpecifiedAsset"
unit_makeChangeForUserSpecifiedAsset
parallel $ describe "Splitting bundles with excessive asset counts" $ do
it "prop_splitBundleIfAssetCountExcessive_length" $
property prop_splitBundleIfAssetCountExcessive_length
it "prop_splitBundleIfAssetCountExcessive_maximalSplitting" $
property prop_splitBundleIfAssetCountExcessive_maximalSplitting
it "prop_splitBundleIfAssetCountExcessive_postCondition" $
property prop_splitBundleIfAssetCountExcessive_postCondition
it "prop_splitBundleIfAssetCountExcessive_sum" $
property prop_splitBundleIfAssetCountExcessive_sum
it "prop_splitBundlesWithExcessiveAssetCounts_length" $
property prop_splitBundlesWithExcessiveAssetCounts_length
it "prop_splitBundlesWithExcessiveAssetCounts_sum" $
property prop_splitBundlesWithExcessiveAssetCounts_sum
parallel $ describe "Splitting bundles with excessive token quantities" $ do
it "prop_splitBundlesWithExcessiveTokenQuantities_length" $
property prop_splitBundlesWithExcessiveTokenQuantities_length
it "prop_splitBundlesWithExcessiveTokenQuantities_sum" $
property prop_splitBundlesWithExcessiveTokenQuantities_sum
parallel $ describe "Grouping and ungrouping" $ do
it "prop_groupByKey_ungroupByKey" $
property $ prop_groupByKey_ungroupByKey @Int @Int
it "prop_ungroupByKey_groupByKey" $
property $ prop_ungroupByKey_groupByKey @Int @Int
parallel $ describe "Round-robin processing" $ do
it "prop_runRoundRobin_identity" $
property $ prop_runRoundRobin_identity @Int
it "prop_runRoundRobin_iterationCount" $
property $ prop_runRoundRobin_iterationCount @TokenName @Word8
it "prop_runRoundRobin_iterationOrder" $
property $ prop_runRoundRobin_iterationOrder @TokenName @Word8
it "prop_runRoundRobin_generationCount" $
property $ prop_runRoundRobin_generationCount @TokenName @Word8
it "prop_runRoundRobin_generationOrder" $
property $ prop_runRoundRobin_generationOrder @TokenName @Word8
parallel $ describe "Selection limits" $ do
it "prop_reduceSelectionLimitBy_lessThanOrEqual" $
property prop_reduceSelectionLimitBy_lessThanOrEqual
it "prop_reduceSelectionLimitBy_reductionNegative" $
property prop_reduceSelectionLimitBy_reductionNegative
it "prop_reduceSelectionLimitBy_reductionZero" $
property prop_reduceSelectionLimitBy_reductionZero
it "prop_reduceSelectionLimitBy_reductionPositive" $
property prop_reduceSelectionLimitBy_reductionPositive
parallel $ describe "Utility functions" $ do
it "prop_mapMaybe_oracle" $
property prop_mapMaybe_oracle
parallel $ describe "Minting and burning values from the change maps" $ do
it "prop_addMintValueToChangeMaps_value" $
property prop_addMintValueToChangeMaps_value
it "prop_addMintValueToChangeMaps_length" $
property prop_addMintValueToChangeMaps_length
it "prop_addMintValueToChangeMaps_order" $
property prop_addMintValueToChangeMaps_order
it "prop_addMintValuesToChangeMaps" $
property prop_addMintValuesToChangeMaps
it "prop_removeBurnValueFromChangeMaps_value" $
property prop_removeBurnValueFromChangeMaps_value
it "prop_removeBurnValueFromChangeMaps_length" $
property prop_removeBurnValueFromChangeMaps_length
it "prop_removeBurnValueFromChangeMaps_order" $
property prop_removeBurnValueFromChangeMaps_order
it "prop_removeBurnValuesFromChangeMaps" $
property prop_removeBurnValuesFromChangeMaps
it "prop_reduceTokenQuantities_value" $
property prop_reduceTokenQuantities_value
it "prop_reduceTokenQuantities_length" $
property prop_reduceTokenQuantities_length
it "prop_reduceTokenQuantities_order" $
property prop_reduceTokenQuantities_order
--------------------------------------------------------------------------------
-- Coverage
--------------------------------------------------------------------------------
prop_Small_UTxOIndex_coverage :: Small (UTxOIndex TestUTxO) -> Property
prop_Small_UTxOIndex_coverage (Small index) =
checkCoverage $ property
-- Asset counts:
$ cover 1 (assetCount == 0)
"asset count = 0"
$ cover 80 (assetCount > 0)
"asset count > 0"
$ cover 40 (assetCount > 8)
"asset count > 8"
-- Entry counts:
$ cover 1 (entryCount == 0)
"UTxO set size = 0 entries"
$ cover 40 (entryCount > 16)
"UTxO set size > 16 entries"
$ cover 10 (entryCount > 32)
"UTxO set size > 32 entries"
True
where
assetCount = Set.size $ UTxOIndex.assets index
entryCount = UTxOIndex.size index
prop_Large_UTxOIndex_coverage :: Large (UTxOIndex TestUTxO) -> Property
prop_Large_UTxOIndex_coverage (Large index) =
-- Generation of large UTxO sets takes longer, so limit the number of runs:
withMaxSuccess 100 $ checkCoverage $ property
-- Asset counts:
$ cover 80 (assetCount > 8)
"asset count > 8"
-- Entry counts:
$ cover 80 (entryCount >= 1_024)
"UTxO set size >= 1024 entries"
$ cover 20 (entryCount >= 2_048)
"UTxO set size >= 2048 entries"
$ cover 10 (entryCount >= 3_072)
"UTxO set size >= 3072 entries"
True
where
assetCount = Set.size $ UTxOIndex.assets index
entryCount = UTxOIndex.size index
--------------------------------------------------------------------------------
-- Ordering of token maps
--------------------------------------------------------------------------------
prop_AssetCount_TokenMap_placesEmptyMapsFirst
:: NonEmpty TokenMap
-> Property
prop_AssetCount_TokenMap_placesEmptyMapsFirst maps =
checkCoverage
-- Check counts of empty maps and non-empty maps:
$ cover 80 (emptyMapCount >= 1 && nonEmptyMapCount >= 1)
"empty map count >= 1 && non-empty map count >= 1"
$ cover 60 (emptyMapCount >= 2 && nonEmptyMapCount >= 2)
"empty map count >= 2 && non-empty map count >= 2"
$ cover 40 (emptyMapCount >= 4 && nonEmptyMapCount >= 4)
"empty map count >= 4 && non-empty map count >= 4"
$ cover 20 (emptyMapCount >= 8 && nonEmptyMapCount >= 8)
"empty map count >= 8 && non-empty map count >= 8"
-- Check head and last element of list:
$ cover 20 (isEmptyMap $ NE.head maps)
"head element is empty map"
$ cover 40 (not $ isEmptyMap $ NE.head maps)
"head element is non-empty map"
$ cover 20 (isEmptyMap $ NE.last maps)
"last element is empty map"
$ cover 40 (not $ isEmptyMap $ NE.last maps)
"last element is non-empty map"
prop
where
prop = (===)
( NE.span isEmptyMap $ NE.sortWith AssetCount maps )
( L.sortOn AssetCount emptyMaps
, L.sortOn AssetCount nonEmptyMaps
)
isEmptyMap = TokenMap.isEmpty
(emptyMaps, nonEmptyMaps) = NE.partition isEmptyMap maps
(emptyMapCount, nonEmptyMapCount) = (length emptyMaps, length nonEmptyMaps)
--------------------------------------------------------------------------------
-- Performing a selection
--------------------------------------------------------------------------------
-- | The result of calling 'performSelection'.
--
-- We define this type alias to shorten type signatures.
--
type PerformSelectionResult = Either
(SelectionBalanceError TestSelectionContext)
(SelectionResult TestSelectionContext)
genSelectionParams
:: Gen (TestUTxO -> Bool)
-> Gen (UTxOIndex TestUTxO)
-> Gen (SelectionParams TestSelectionContext)
genSelectionParams genPreselectedInputs genUTxOIndex' = do
utxoAvailable <- genUTxOIndex'
isInputPreselected <- oneof
[ genPreselectedInputs
, genPreselectedInputsNone
]
outputCount <- elements
[0, 1, max 2 $ UTxOIndex.size utxoAvailable `div` 8]
outputsToCover <-
replicateM outputCount $ (,)
<$> arbitrary @TestAddress
<*> genTokenBundleSmallRangePositive
extraCoinSource <-
oneof [pure $ Coin 0, genCoinPositive]
extraCoinSink <-
oneof [pure $ Coin 0, genCoinPositive]
(assetsToMint, assetsToBurn) <- genAssetsToMintAndBurn utxoAvailable
selectionStrategy <- genSelectionStrategy
pure $ SelectionParams
{ outputsToCover
, utxoAvailable =
UTxOSelection.fromIndexFiltered isInputPreselected utxoAvailable
, extraCoinSource
, extraCoinSink
, assetsToMint
, assetsToBurn
, selectionStrategy
}
where
genAssetsToMintAndBurn :: UTxOIndex TestUTxO -> Gen (TokenMap, TokenMap)
genAssetsToMintAndBurn utxoAvailable = do
assetsToMint <- genTokenMapSmallRange
let assetsToBurn = adjustAllTokenMapQuantities
(`div` 2)
(utxoAvailableAssets <> assetsToMint)
pure (assetsToMint, assetsToBurn)
where
utxoAvailableAssets :: TokenMap
utxoAvailableAssets = view (#balance . #tokens) utxoAvailable
genPreselectedInputsNone :: Gen (TestUTxO -> Bool)
genPreselectedInputsNone = pure $ const False
shrinkSelectionParams
:: SelectionParams TestSelectionContext
-> [SelectionParams TestSelectionContext]
shrinkSelectionParams = genericRoundRobinShrink
<@> shrinkList shrinkOutput
<:> shrinkUTxOSelection (shrink @TestUTxO)
<:> shrinkCoin
<:> shrinkCoin
<:> shrinkTokenMap
<:> shrinkTokenMap
<:> shrinkSelectionStrategy
<:> Nil
where
shrinkOutput = genericRoundRobinShrink
<@> shrink @TestAddress
<:> (filter tokenBundleHasNonZeroCoin . shrinkTokenBundleSmallRange)
<:> Nil
where
tokenBundleHasNonZeroCoin :: TokenBundle -> Bool
tokenBundleHasNonZeroCoin b = TokenBundle.getCoin b /= Coin 0
prop_performSelection_small
:: MockSelectionConstraints
-> Blind (Small (SelectionParams TestSelectionContext))
-> Property
prop_performSelection_small mockConstraints (Blind (Small params)) =
checkCoverage $
-- Inspect the balance:
cover 20 (isUTxOBalanceSufficient params)
"balance sufficient" $
cover 25 (not $ isUTxOBalanceSufficient params)
"balance insufficient" $
-- Inspect the UTxO and user-specified outputs:
cover 5 (utxoHasAtLeastOneAsset)
"UTxO has at least one asset" $
cover 5 (not outputsHaveAtLeastOneAsset)
"No assets to cover" $
cover 2 (outputsHaveAtLeastOneAsset && not utxoHasAtLeastOneAsset)
"Assets to cover, but no assets in UTxO" $
cover 10 (null (view #outputsToCover params))
"Outputs to cover = 0" $
cover 10 (length (view #outputsToCover params) == 1)
"Outputs to cover = 1" $
cover 10 (length (view #outputsToCover params) > 1)
"Outputs to cover > 1" $
cover 10 (UTxOSelection.selectedSize (view #utxoAvailable params) == 0)
"Number of inputs preselected == 0" $
cover 2 (UTxOSelection.selectedSize (view #utxoAvailable params) == 1)
"Number of inputs preselected == 1" $
cover 10 (UTxOSelection.selectedSize (view #utxoAvailable params) >= 2)
"Number of inputs preselected >= 2" $
-- Inspect the selection strategy:
cover 20 (view #selectionStrategy params == SelectionStrategyMinimal)
"Selection strategy: minimal" $
cover 20 (view #selectionStrategy params == SelectionStrategyOptimal)
"Selection strategy: optimal" $
-- Inspect the extra coin source and sink:
let nonZeroExtraCoinSource =
Coin 0 < (params & view #extraCoinSource)
nonZeroExtraCoinSink =
Coin 0 < (params & view #extraCoinSink)
in
cover 20
(nonZeroExtraCoinSource && nonZeroExtraCoinSink)
"nonZeroExtraCoinSource && nonZeroExtraCoinSink" $
cover 20
(not nonZeroExtraCoinSource && nonZeroExtraCoinSink)
"not nonZeroExtraCoinSource && nonZeroExtraCoinSink" $
cover 20
(nonZeroExtraCoinSource && not nonZeroExtraCoinSink)
"nonZeroExtraCoinSource && not nonZeroExtraCoinSink" $
cover 20
(not nonZeroExtraCoinSource && not nonZeroExtraCoinSink)
"not nonZeroExtraCoinSource && not nonZeroExtraCoinSink" $
-- Inspect the sets of minted and burned assets:
cover 20 (view #assetsToMint params /= TokenMap.empty)
"Have some assets to mint" $
cover 20 (view #assetsToBurn params /= TokenMap.empty)
"Have some assets to burn" $
cover 2 (view #assetsToMint params == TokenMap.empty)
"Have no assets to mint" $
cover 2 (view #assetsToBurn params == TokenMap.empty)
"Have no assets to burn" $
-- Inspect the intersection between minted assets and burned assets:
cover 2 (someAssetsAreBothMintedAndBurned)
"Some assets are both minted and burned" $
cover 2 (noAssetsAreBothMintedAndBurned)
"No assets are both minted and burned" $
-- Inspect the intersection between minted assets and spent assets:
cover 2 (someAssetsAreBothMintedAndSpent)
"Some assets are both minted and spent" $
cover 2 (noAssetsAreBothMintedAndSpent)
"No assets are both minted and spent" $
-- Inspect the intersection between spent assets and burned assets:
cover 2 (someAssetsAreBothSpentAndBurned)
"Some assets are both spent and burned" $
cover 2 (noAssetsAreBothSpentAndBurned)
"No assets are both spent and burned" $
-- Inspect the relationship between minted, burned, and spent assets:
cover 2 (allMintedAssetsEitherBurnedOrSpent)
"All minted assets were either spent or burned" $
cover 2 (not allMintedAssetsEitherBurnedOrSpent)
"Some minted assets were neither spent nor burned" $
prop_performSelection mockConstraints params $ \result ->
cover 10 (selectionUnlimited && selectionSufficient result)
"selection unlimited and sufficient"
. cover 2 (selectionLimited && selectionSufficient result)
"selection limited but sufficient"
. cover 2 (selectionLimited && selectionInsufficient result)
"selection limited and insufficient"
where
utxoHasAtLeastOneAsset = not
. Set.null
. TokenBundle.getAssets
$ computeUTxOBalanceAvailable params
outputsHaveAtLeastOneAsset =
not . Set.null $ TokenBundle.getAssets outputTokens
where
outputTokens = mconcat
. F.toList
. fmap snd
$ view #outputsToCover params
constraints :: SelectionConstraints TestSelectionContext
constraints = unMockSelectionConstraints mockConstraints
selectionLimit :: SelectionLimit
selectionLimit = view #computeSelectionLimit constraints
$ F.toList
$ view #outputsToCover params
selectionLimited :: Bool
selectionLimited = case selectionLimit of
MaximumInputLimit _ -> True
NoLimit -> False
selectionUnlimited :: Bool
selectionUnlimited = not selectionLimited
selectionSufficient :: PerformSelectionResult -> Bool
selectionSufficient = \case
Right _ -> True
_ -> False
selectionInsufficient :: PerformSelectionResult -> Bool
selectionInsufficient = \case
Left (SelectionLimitReached _) -> True
_ -> False
assetsSpentByUserSpecifiedOutputs :: TokenMap
assetsSpentByUserSpecifiedOutputs =
F.foldMap (view #tokens . snd) (view #outputsToCover params)
allMintedAssetsEitherBurnedOrSpent :: Bool
allMintedAssetsEitherBurnedOrSpent =
view #assetsToMint params `leq` TokenMap.add
(view #assetsToBurn params)
(assetsSpentByUserSpecifiedOutputs)
someAssetsAreBothMintedAndBurned :: Bool
someAssetsAreBothMintedAndBurned
= TokenMap.isNotEmpty
$ TokenMap.intersection
(view #assetsToMint params)
(view #assetsToBurn params)
someAssetsAreBothMintedAndSpent :: Bool
someAssetsAreBothMintedAndSpent
= TokenMap.isNotEmpty
$ TokenMap.intersection
(view #assetsToMint params)
(assetsSpentByUserSpecifiedOutputs)
someAssetsAreBothSpentAndBurned :: Bool
someAssetsAreBothSpentAndBurned
= TokenMap.isNotEmpty
$ TokenMap.intersection
(assetsSpentByUserSpecifiedOutputs)
(view #assetsToBurn params)
noAssetsAreBothMintedAndBurned :: Bool
noAssetsAreBothMintedAndBurned = not someAssetsAreBothMintedAndBurned
noAssetsAreBothMintedAndSpent :: Bool
noAssetsAreBothMintedAndSpent = not someAssetsAreBothMintedAndSpent
noAssetsAreBothSpentAndBurned :: Bool
noAssetsAreBothSpentAndBurned = not someAssetsAreBothSpentAndBurned
prop_performSelection_large
:: MockSelectionConstraints
-> Blind (Large (SelectionParams TestSelectionContext))
-> Property
prop_performSelection_large mockConstraints (Blind (Large params)) =
-- Generation of large UTxO sets takes longer, so limit the number of runs:
withMaxSuccess 100 $
checkCoverage $
cover 50 (isUTxOBalanceSufficient params)
"UTxO balance sufficient" $
prop_performSelection mockConstraints params (const id)
prop_performSelection_huge :: Property
prop_performSelection_huge = ioProperty $
-- The UTxO index is generated outside of the property in order to avoid
-- the cost of re-generating it on every pass. This will still generate
-- interesting cases, since selection within that large index is random.
property . prop_performSelection_huge_inner <$> generate
(genUTxOIndexLargeN (resize 256 (arbitrary @TestUTxO)) 50_000)
prop_performSelection_huge_inner
:: UTxOIndex TestUTxO
-> MockSelectionConstraints
-> Large (SelectionParams TestSelectionContext)
-> Property
prop_performSelection_huge_inner utxoAvailable mockConstraints (Large params) =
withMaxSuccess 5 $
prop_performSelection mockConstraints params' (const id)
where
params' :: SelectionParams TestSelectionContext
params' = params
{ utxoAvailable = UTxOSelection.fromIndex utxoAvailable }
prop_performSelection
:: MockSelectionConstraints
-> SelectionParams TestSelectionContext
-> (PerformSelectionResult -> Property -> Property)
-> Property
prop_performSelection mockConstraints params coverage =
report extraCoinSource
"extraCoinSource" $
report extraCoinSink
"extraCoinSink" $
report selectionLimit
"selectionLimit" $
report assetsToMint
"assetsToMint" $
report assetsToBurn
"assetsToBurn" $
monadicIO $ do
result <- run $ performSelection constraints params
monitor (coverage result)
pure $ either onFailure onSuccess result
where
constraints :: SelectionConstraints TestSelectionContext
constraints = unMockSelectionConstraints mockConstraints
SelectionParams
{ outputsToCover
, extraCoinSource
, extraCoinSink
, assetsToMint
, assetsToBurn
} = params
onSuccess :: SelectionResultOf [] TestSelectionContext -> Property
onSuccess result =
counterexample "onSuccess" $
report
(utxoBalanceAvailable)
"available UTXO balance" $
report
(utxoBalanceRequired)
"required UTXO balance" $
report
(F.fold $ view #changeGenerated result)
"change balance" $
report
(selectionDeltaAllAssets result)
"actual delta" $
report
(selectionMinimumCost constraints result)
"minimum cost" $
report
(length $ view #outputsCovered result)
"number of outputs" $
report
(length $ view #changeGenerated result)
"number of change outputs" $
verify
(isUTxOBalanceSufficient params)
"isUTxOBalanceSufficient params" $
verify
(selectionHasValidSurplus constraints result)
"selectionHasValidSurplus constraints result" $
verify
(initialSelectionIsSubsetOfFinalSelection)
"initialSelectionIsSubsetOfFinalSelection" $
verify
(view #outputsCovered result == view #outputsToCover params)
"view #outputsCovered result == view #outputsToCover params" $
verify
(view #assetsToMint result == view #assetsToMint params)
"view #assetsToMint result == view #assetsToMint params" $
verify
(view #assetsToBurn result == view #assetsToBurn params)
"view #assetsToBurn result == view #assetsToBurn params" $
verify
(view #extraCoinSource result == view #extraCoinSource params)
"view #extraCoinSource result == view #extraCoinSource params" $
verify
(view #extraCoinSink result == view #extraCoinSink params)
"view #extraCoinSink result == view #extraCoinSink params" $
case selectionLimit of
MaximumInputLimit limit ->
verify
(NE.length (view #inputsSelected result) <= limit)
"NE.length (view #inputsSelected result) <= limit" $
property True
NoLimit ->
property True
where
initialSelectionIsSubsetOfFinalSelection :: Bool
initialSelectionIsSubsetOfFinalSelection =
view #utxoAvailable params
`UTxOSelection.isSubSelectionOf`
UTxOSelection.selectMany
(view #inputsSelected result <&> fst)
(view #utxoAvailable params)
onFailure :: SelectionBalanceError TestSelectionContext -> Property
onFailure = \case
BalanceInsufficient e ->
onBalanceInsufficient e
SelectionLimitReached e ->
onSelectionLimitReached e
UnableToConstructChange e ->
onUnableToConstructChange e
EmptyUTxO ->
onEmptyUTxO
onBalanceInsufficient :: BalanceInsufficientError -> Property
onBalanceInsufficient e =
counterexample "onBalanceInsufficient" $
report utxoBalanceAvailable
"available balance" $
report utxoBalanceRequired
"required balance" $
report errorBalanceShortfall
"missing balance" $