{-# LANGUAGE CPP #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeApplications #-}
module Main where
import Control.Category (Category((.), id))
import Control.DeepSeq (rnf)
import qualified Data.AdditiveGroup as AG
import qualified Data.Binary as Binary
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import qualified Data.Char as Char
import Data.Constraint (Dict(Dict))
import Data.Maybe (catMaybes, fromJust, fromMaybe, isJust, isNothing)
import Data.Proxy (Proxy(Proxy))
import Data.Ratio ((%), numerator, denominator)
import qualified Data.Text as T
import qualified Data.VectorSpace as VS
import Data.Word (Word8)
import GHC.Exts (fromList)
import GHC.TypeLits (Nat, Symbol, KnownSymbol, symbolVal)
import Prelude hiding ((.), id)
import qualified Test.Tasty as Tasty
import Test.Tasty.HUnit ((@?=), (@=?))
import qualified Test.Tasty.HUnit as HU
import qualified Test.Tasty.Runners as Tasty
import Test.Tasty.QuickCheck ((===), (==>), (.&&.))
import qualified Test.Tasty.QuickCheck as QC
import qualified Money
import qualified Money.Internal as MoneyI
--------------------------------------------------------------------------------
-- | A wrapper around a decimal representation and its 'Money.DecimalConf',
-- mostly just to benefit from its 'QC.Arbitrary' instance.
data Decimal = Decimal Money.DecimalConf T.Text
deriving (Show)
instance QC.Arbitrary Decimal where
arbitrary = uncurry (flip Decimal) <$> genDecimal
shrink (Decimal ds t) = Decimal <$> QC.shrink ds
<*> fmap T.pack (QC.shrink (T.unpack t))
-- | Generates a valid 'MoneyI.rationalToDecimal' result using the returned
-- 'Money.DecimalConf'.
genDecimal :: QC.Gen (T.Text, Money.DecimalConf)
genDecimal = do
aprox :: Money.Approximation <- QC.arbitrary
ds :: Money.DecimalConf <- QC.arbitrary
r :: Rational <- (%) <$> QC.arbitrary <*> QC.suchThat QC.arbitrary (/= 0)
pure (MoneyI.rationalToDecimal ds aprox r, ds)
--------------------------------------------------------------------------------
main :: IO ()
main = Tasty.defaultMainWithIngredients
[ Tasty.consoleTestReporter
, Tasty.listingTests
] (Tasty.localOption (QC.QuickCheckTests 100) tests)
tests :: Tasty.TestTree
tests =
Tasty.testGroup "root"
[ testCurrencies
, testHalfEvenRounding
, testCurrencyUnits
, testExchange
, testRationalToDecimal
, testRationalFromDecimal
, testMkSeparators
, testDiscreteFromDecimal
, testRawSerializations
]
testCurrencies :: Tasty.TestTree
testCurrencies =
Tasty.testGroup "Currency"
[ testDense (Proxy :: Proxy "BTC") -- A cryptocurrency.
, testDense (Proxy :: Proxy "USD") -- A fiat currency with decimal fractions.
, testDense (Proxy :: Proxy "VUV") -- A fiat currency with non-decimal fractions.
, testDense (Proxy :: Proxy "XAU") -- A precious metal.
]
testCurrencyUnits :: Tasty.TestTree
testCurrencyUnits =
Tasty.testGroup "Currency units"
[ testDiscrete (Proxy :: Proxy "BTC") (Proxy :: Proxy "satoshi")
, testDiscrete (Proxy :: Proxy "BTC") (Proxy :: Proxy "bitcoin")
, testDiscrete (Proxy :: Proxy "USD") (Proxy :: Proxy "cent")
, testDiscrete (Proxy :: Proxy "USD") (Proxy :: Proxy "dollar")
, testDiscrete (Proxy :: Proxy "VUV") (Proxy :: Proxy "vatu")
, testDiscrete (Proxy :: Proxy "XAU") (Proxy :: Proxy "gram")
, testDiscrete (Proxy :: Proxy "XAU") (Proxy :: Proxy "grain")
]
testRationalToDecimal :: Tasty.TestTree
testRationalToDecimal =
Tasty.testGroup "rationalToDecimal"
[ HU.testCase "Round: r1" $ do
render Money.Round r1 @?=
[ "1023004567.90" -- 0
, "1,023,004,567.90" -- 1
, "+1023004567.90" -- 2
, "+1,023,004,567.90" -- 3
, "1023004568" -- 4
, "1,023,004,568" -- 5
, "+1023004568" -- 6
, "+1,023,004,568" -- 7
]
, HU.testCase "Round: negate r1" $ do
render Money.Round (negate r1) @?=
[ "-1023004567.90" -- 0
, "-1,023,004,567.90" -- 1
, "-1023004567.90" -- 2
, "-1,023,004,567.90" -- 3
, "-1023004568" -- 4
, "-1,023,004,568" -- 5
, "-1023004568" -- 6
, "-1,023,004,568" -- 7
]
, HU.testCase "Round: r2" $ do
render Money.Round r2 @?=
[ "1.23" -- 0
, "1.23" -- 1
, "+1.23" -- 2
, "+1.23" -- 3
, "1" -- 4
, "1" -- 5
, "+1" -- 6
, "+1" -- 7
]
, HU.testCase "Round: negate r2" $ do
render Money.Round (negate r2) @?=
[ "-1.23" -- 0
, "-1.23" -- 1
, "-1.23" -- 2
, "-1.23" -- 3
, "-1" -- 4
, "-1" -- 5
, "-1" -- 6
, "-1" -- 7
]
, HU.testCase "Round: r3" $ do
render Money.Round r3 @?=
[ "0.34" -- 0
, "0.34" -- 1
, "+0.34" -- 2
, "+0.34" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Round: negate r3" $ do
render Money.Round (negate r3) @?=
[ "-0.34" -- 0
, "-0.34" -- 1
, "-0.34" -- 2
, "-0.34" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Round: r4" $ do
render Money.Round r4 @?=
[ "0.01" -- 0
, "0.01" -- 1
, "+0.01" -- 2
, "+0.01" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Round: negate r4" $ do
render Money.Round (negate r4) @?=
[ "-0.01" -- 0
, "-0.01" -- 1
, "-0.01" -- 2
, "-0.01" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Round: r5" $ do
render Money.Round r5 @?=
[ "0.50" -- 0
, "0.50" -- 1
, "+0.50" -- 2
, "+0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Round: negate r5" $ do
render Money.Round (negate r5) @?=
[ "-0.50" -- 0
, "-0.50" -- 1
, "-0.50" -- 2
, "-0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Floor: r1" $ do
render Money.Floor r1 @?=
[ "1023004567.89" -- 0
, "1,023,004,567.89" -- 1
, "+1023004567.89" -- 2
, "+1,023,004,567.89" -- 3
, "1023004567" -- 4
, "1,023,004,567" -- 5
, "+1023004567" -- 6
, "+1,023,004,567" -- 7
]
, HU.testCase "Floor: negate r1" $ do
render Money.Floor (negate r1) @?=
[ "-1023004567.90" -- 0
, "-1,023,004,567.90" -- 1
, "-1023004567.90" -- 2
, "-1,023,004,567.90" -- 3
, "-1023004568" -- 4
, "-1,023,004,568" -- 5
, "-1023004568" -- 6
, "-1,023,004,568" -- 7
]
, HU.testCase "Floor: r2" $ do
render Money.Floor r2 @?=
[ "1.23" -- 0
, "1.23" -- 1
, "+1.23" -- 2
, "+1.23" -- 3
, "1" -- 4
, "1" -- 5
, "+1" -- 6
, "+1" -- 7
]
, HU.testCase "Floor: negate r2" $ do
render Money.Floor (negate r2) @?=
[ "-1.23" -- 0
, "-1.23" -- 1
, "-1.23" -- 2
, "-1.23" -- 3
, "-2" -- 4
, "-2" -- 5
, "-2" -- 6
, "-2" -- 7
]
, HU.testCase "Floor: r3" $ do
render Money.Floor r3 @?=
[ "0.34" -- 0
, "0.34" -- 1
, "+0.34" -- 2
, "+0.34" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Floor: negate r3" $ do
render Money.Floor (negate r3) @?=
[ "-0.35" -- 0
, "-0.35" -- 1
, "-0.35" -- 2
, "-0.35" -- 3
, "-1" -- 4
, "-1" -- 5
, "-1" -- 6
, "-1" -- 7
]
, HU.testCase "Floor: r4" $ do
render Money.Floor r4 @?=
[ "0.00" -- 0
, "0.00" -- 1
, "0.00" -- 2
, "0.00" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Floor: negate r4" $ do
render Money.Floor (negate r4) @?=
[ "-0.01" -- 0
, "-0.01" -- 1
, "-0.01" -- 2
, "-0.01" -- 3
, "-1" -- 4
, "-1" -- 5
, "-1" -- 6
, "-1" -- 7
]
, HU.testCase "Floor: r5" $ do
render Money.Floor r5 @?=
[ "0.50" -- 0
, "0.50" -- 1
, "+0.50" -- 2
, "+0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Floor: negate r5" $ do
render Money.Floor (negate r5) @?=
[ "-0.50" -- 0
, "-0.50" -- 1
, "-0.50" -- 2
, "-0.50" -- 3
, "-1" -- 4
, "-1" -- 5
, "-1" -- 6
, "-1" -- 7
]
, HU.testCase "Ceiling: r1" $ do
render Money.Ceiling r1 @?=
[ "1023004567.90" -- 0
, "1,023,004,567.90" -- 1
, "+1023004567.90" -- 2
, "+1,023,004,567.90" -- 3
, "1023004568" -- 4
, "1,023,004,568" -- 5
, "+1023004568" -- 6
, "+1,023,004,568" -- 7
]
, HU.testCase "Ceiling: negate r1" $ do
render Money.Ceiling (negate r1) @?=
[ "-1023004567.89" -- 0
, "-1,023,004,567.89" -- 1
, "-1023004567.89" -- 2
, "-1,023,004,567.89" -- 3
, "-1023004567" -- 4
, "-1,023,004,567" -- 5
, "-1023004567" -- 6
, "-1,023,004,567" -- 7
]
, HU.testCase "Ceiling: r2" $ do
render Money.Ceiling r2 @?=
[ "1.23" -- 0
, "1.23" -- 1
, "+1.23" -- 2
, "+1.23" -- 3
, "2" -- 4
, "2" -- 5
, "+2" -- 6
, "+2" -- 7
]
, HU.testCase "Ceiling: negate r2" $ do
render Money.Ceiling (negate r2) @?=
[ "-1.23" -- 0
, "-1.23" -- 1
, "-1.23" -- 2
, "-1.23" -- 3
, "-1" -- 4
, "-1" -- 5
, "-1" -- 6
, "-1" -- 7
]
, HU.testCase "Ceiling: r3" $ do
render Money.Ceiling r3 @?=
[ "0.35" -- 0
, "0.35" -- 1
, "+0.35" -- 2
, "+0.35" -- 3
, "1" -- 4
, "1" -- 5
, "+1" -- 6
, "+1" -- 7
]
, HU.testCase "Ceiling: negate r3" $ do
render Money.Ceiling (negate r3) @?=
[ "-0.34" -- 0
, "-0.34" -- 1
, "-0.34" -- 2
, "-0.34" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Ceiling: r4" $ do
render Money.Ceiling r4 @?=
[ "0.01" -- 0
, "0.01" -- 1
, "+0.01" -- 2
, "+0.01" -- 3
, "1" -- 4
, "1" -- 5
, "+1" -- 6
, "+1" -- 7
]
, HU.testCase "Ceiling: negate r4" $ do
render Money.Ceiling (negate r4) @?=
[ "0.00" -- 0
, "0.00" -- 1
, "0.00" -- 2
, "0.00" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Ceiling: r5" $ do
render Money.Ceiling r5 @?=
[ "0.50" -- 0
, "0.50" -- 1
, "+0.50" -- 2
, "+0.50" -- 3
, "1" -- 4
, "1" -- 5
, "+1" -- 6
, "+1" -- 7
]
, HU.testCase "Ceiling: negate r5" $ do
render Money.Ceiling (negate r5) @?=
[ "-0.50" -- 0
, "-0.50" -- 1
, "-0.50" -- 2
, "-0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "Truncate: r1" $ do
render Money.Truncate r1 @?= render Money.Floor r1
, HU.testCase "Truncate: negate r1" $ do
render Money.Truncate (negate r1) @?= render Money.Ceiling (negate r1)
, HU.testCase "Truncate: r2" $ do
render Money.Truncate r2 @?= render Money.Floor r2
, HU.testCase "Truncate: negate r2" $ do
render Money.Truncate (negate r2) @?= render Money.Ceiling (negate r2)
, HU.testCase "Truncate: r3" $ do
render Money.Truncate r3 @?= render Money.Floor r3
, HU.testCase "Truncate: negate r3" $ do
render Money.Truncate (negate r3) @?= render Money.Ceiling (negate r3)
, HU.testCase "Truncate: r4" $ do
render Money.Truncate r4 @?= render Money.Floor r4
, HU.testCase "Truncate: negate r4" $ do
render Money.Truncate (negate r4) @?= render Money.Ceiling (negate r4)
, HU.testCase "Truncate: r5" $ do
render Money.Truncate r5 @?= render Money.Floor r5
, HU.testCase "Truncate: negate r5" $ do
render Money.Truncate (negate r5) @?= render Money.Ceiling (negate r5)
, HU.testCase "HalfEven: r1" $ do
render Money.HalfEven r1 @?= render Money.Round r1
, HU.testCase "HalfEven: negate r1" $ do
render Money.HalfEven (negate r1) @?= render Money.Round (negate r1)
, HU.testCase "HalfEven: r2" $ do
render Money.HalfEven r2 @?= render Money.Round r2
, HU.testCase "HalfEven: negate r2" $ do
render Money.HalfEven (negate r2) @?= render Money.Round (negate r2)
, HU.testCase "HalfEven: r3" $ do
render Money.HalfEven r3 @?= render Money.Round r3
, HU.testCase "HalfEven: negate r3" $ do
render Money.HalfEven (negate r3) @?= render Money.Round (negate r3)
, HU.testCase "HalfEven: r4" $ do
render Money.HalfEven r4 @?= render Money.Round r4
, HU.testCase "HalfEven: negate r4" $ do
render Money.HalfEven (negate r4) @?= render Money.Round (negate r4)
, HU.testCase "HalfEven: r5" $ do
render Money.HalfEven r5 @?=
[ "0.50" -- 0
, "0.50" -- 1
, "+0.50" -- 2
, "+0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
, HU.testCase "HalfEven: negate r5" $ do
render Money.HalfEven (negate r5) @?=
[ "-0.50" -- 0
, "-0.50" -- 1
, "-0.50" -- 2
, "-0.50" -- 3
, "0" -- 4
, "0" -- 5
, "0" -- 6
, "0" -- 7
]
]
where
r1 :: Rational = 1023004567895 % 1000
r2 :: Rational = 123 % 100
r3 :: Rational = 345 % 1000
r4 :: Rational = 7 % 1000
r5 :: Rational = 1 % 2
render :: Money.Approximation -> Rational -> [T.Text]
render a r =
[ MoneyI.rationalToDecimal ds_dd_2 a r -- 0
, MoneyI.rationalToDecimal ds_tc_dd_2 a r -- 1
, MoneyI.rationalToDecimal ds_p_dd_2 a r -- 2
, MoneyI.rationalToDecimal ds_p_tc_dd_2 a r -- 3
, MoneyI.rationalToDecimal ds_dd_0 a r -- 4
, MoneyI.rationalToDecimal ds_tc_dd_0 a r -- 5
, MoneyI.rationalToDecimal ds_p_dd_0 a r -- 6
, MoneyI.rationalToDecimal ds_p_tc_dd_0 a r -- 7
]
testMkSeparators :: Tasty.TestTree
testMkSeparators =
Tasty.testGroup "mkSeparators"
[ QC.testProperty "Unsupported separators" $
let mbadsep :: QC.Gen Char = QC.suchThat QC.arbitrary $ \c ->
Char.isDigit c || Char.isControl c
mgoodsep :: QC.Gen Char = QC.suchThat QC.arbitrary $ \c ->
not (Char.isDigit c || Char.isControl c)
in QC.forAll ((,,) <$> mbadsep <*> mbadsep <*> mgoodsep) $
\(s1 :: Char, s2 :: Char, s3 :: Char) ->
(Money.mkSeparators s1 Nothing === Nothing) .&&.
(Money.mkSeparators s2 (Just s1) === Nothing) .&&.
(Money.mkSeparators s1 (Just s1) === Nothing) .&&.
(Money.mkSeparators s3 (Just s3) === Nothing)
]
testRationalFromDecimal :: Tasty.TestTree
testRationalFromDecimal =
Tasty.testGroup "rationalFromDecimal"
[ Tasty.localOption (QC.QuickCheckTests 1000) $
QC.testProperty "Lossy roundtrip" $
-- We check that the roundtrip results in a close amount with a fractional
-- difference of up to one.
QC.forAll QC.arbitrary $ \(ds0 :: Money.DecimalConf,
aprox :: Money.Approximation,
r :: Rational) ->
let Just sr = Money.scaleFromRational
$ (+ 1) -- scales less than 1 can't reliably roundtrip.
$ Money.scaleToRational
$ Money.decimalConf_scale ds0
ds1 = ds0 { Money.decimalConf_scale = sr }
dec = MoneyI.rationalToDecimal ds1 aprox r
Just r' = MoneyI.rationalFromDecimal ds1 dec
in 1 > abs (abs r - abs r')
]
testDense
:: forall currency
. KnownSymbol currency
=> Proxy currency
-> Tasty.TestTree
testDense pc =
Tasty.testGroup ("Dense " ++ show (symbolVal pc))
[ QC.testProperty "rnf" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
() === rnf x
, QC.testProperty "read . show == id" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
x === read (show x)
, QC.testProperty "read . show . Just == Just " $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
Just x === read (show (Just x))
, QC.testProperty "fromSomeDense . someDense == Just" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
Just x === Money.fromSomeDense (Money.toSomeDense x)
, QC.testProperty "fromSomeDense works only for same currency" $
QC.forAll QC.arbitrary $ \(dr :: Money.SomeDense) ->
(T.unpack (Money.someDenseCurrency dr) /= symbolVal pc)
==> isNothing (Money.fromSomeDense dr :: Maybe (Money.Dense currency))
, QC.testProperty "withSomeDense" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
let dr = Money.toSomeDense x
in Money.withSomeDense dr $ \x' ->
(show x, dr, Money.toSomeDense (x + 1))
=== (show x', Money.toSomeDense x', Money.toSomeDense (x' + 1))
, QC.testProperty "denseCurrency" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
T.unpack (Money.denseCurrency x) === symbolVal pc
, QC.testProperty "denseToDecimal: Same as rationalToDecimal" $
QC.forAll QC.arbitrary $ \(ds :: Money.DecimalConf,
dns :: Money.Dense currency,
aprox :: Money.Approximation) ->
let Just s100 = Money.scaleFromRational
(Money.scaleToRational (Money.decimalConf_scale ds) * 100)
ds_s100 = ds { Money.decimalConf_scale = s100 }
ydnsd1 = Money.denseToDecimal ds aprox dns
ydnsd100 = Money.denseToDecimal ds_s100 aprox dns
yrd1 = MoneyI.rationalToDecimal ds aprox (toRational dns)
yrd100 = MoneyI.rationalToDecimal ds aprox (toRational dns * 100)
in (ydnsd1 === yrd1) .&&. (ydnsd100 === yrd100)
, QC.testProperty "denseFromDecimal: Same as rationalFromDecimal" $
QC.forAll QC.arbitrary $ \(Decimal ds dec) ->
let Just r = MoneyI.rationalFromDecimal ds dec
Just dns = Money.denseFromDecimal ds dec
in r === toRational (dns :: Money.Dense currency)
, Tasty.localOption (QC.QuickCheckTests 1000) $
QC.testProperty "denseToDecimal/denseFromDiscrete: Lossy roundtrip" $
-- We check that the roundtrip results in a close amount with a fractional
-- difference of up to one.
QC.forAll QC.arbitrary $ \(ds0 :: Money.DecimalConf,
aprox :: Money.Approximation,
dns :: Money.Dense currency) ->
let Just sr = Money.scaleFromRational
$ (+ 1) -- scales less than 1 can't reliably roundtrip.
$ Money.scaleToRational
$ Money.decimalConf_scale ds0
ds1 = ds0 { Money.decimalConf_scale = sr }
dec = Money.denseToDecimal ds1 aprox dns
Just dns' = Money.denseFromDecimal ds1 dec
in Money.dense' 1 > abs (abs dns - abs dns')
, HU.testCase "AdditiveGroup: zeroV" $
(AG.zeroV :: Money.Dense currency) @?= Money.dense' (0%1)
, QC.testProperty "AdditiveGroup: negateV" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
AG.negateV x === negate x
, QC.testProperty "AdditiveGroup: ^+^" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency, y) ->
x AG.^+^ y === x + y
, QC.testProperty "AdditiveGroup: ^-^" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency, y) ->
x AG.^-^ y === x - y
, QC.testProperty "VectorSpace: *^" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency, y) ->
(toRational x VS.*^ y === x * y) .&&.
(toRational y VS.*^ x === x * y)
, QC.testProperty "Binary encoding roundtrip" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)
in x === y
, QC.testProperty "Binary encoding roundtrip (SomeDense)" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
let x' = Money.toSomeDense x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (Dense through SomeDense)" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
let x' = Money.toSomeDense x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x) === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (SomeDense through Dense)" $
QC.forAll QC.arbitrary $ \(x :: Money.Dense currency) ->
let x' = Money.toSomeDense x
bs = Binary.encode x
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
]
testExchange :: Tasty.TestTree
testExchange =
Tasty.testGroup "Exchange"
[ testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "BTC")
, testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "USD")
, testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "VUV")
, testExchangeRate (Proxy :: Proxy "BTC") (Proxy :: Proxy "XAU")
, testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "BTC")
, testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "USD")
, testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "VUV")
, testExchangeRate (Proxy :: Proxy "USD") (Proxy :: Proxy "XAU")
, testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "BTC")
, testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "USD")
, testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "VUV")
, testExchangeRate (Proxy :: Proxy "VUV") (Proxy :: Proxy "XAU")
, testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "BTC")
, testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "USD")
, testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "VUV")
, testExchangeRate (Proxy :: Proxy "XAU") (Proxy :: Proxy "XAU")
]
testDiscrete
:: forall (currency :: Symbol) (unit :: Symbol)
. ( Money.GoodScale (Money.UnitScale currency unit)
, KnownSymbol currency
, KnownSymbol unit )
=> Proxy currency
-> Proxy unit
-> Tasty.TestTree
testDiscrete pc pu =
Tasty.testGroup ("Discrete " ++ show (symbolVal pc) ++ " "
++ show (symbolVal pu))
[ testRounding pc pu
, QC.testProperty "rnf" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
() === rnf x
, QC.testProperty "read . show == id" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
x === read (show x)
, QC.testProperty "read . show . Just == Just" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
Just x === read (show (Just x))
, QC.testProperty "fromSomeDiscrete . someDiscrete == Just" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
Just x === Money.fromSomeDiscrete (Money.toSomeDiscrete x)
, QC.testProperty "fromSomeDiscrete works only for same currency and scale" $
QC.forAll QC.arbitrary $ \(dr :: Money.SomeDiscrete) ->
((T.unpack (Money.someDiscreteCurrency dr) /= symbolVal pc) &&
(Money.someDiscreteScale dr /=
Money.scale (Proxy :: Proxy (Money.UnitScale currency unit)))
) ==> isNothing (Money.fromSomeDiscrete dr
:: Maybe (Money.Discrete currency unit))
, QC.testProperty "withSomeDiscrete" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
let dr = Money.toSomeDiscrete x
in ( Money.withSomeDiscrete dr $ \x' ->
(show x, dr, Money.toSomeDiscrete (x + 1))
=== (show x', Money.toSomeDiscrete x', Money.toSomeDiscrete (x' + 1))
) :: QC.Property
, QC.testProperty "discreteCurrency" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
T.unpack (Money.discreteCurrency x) === symbolVal pc
, QC.testProperty "discreteToDecimal/discreteFromDecimal: Same as denseToDecimal/denseFromDecimal" $
-- We check that the roundtrip results in a close amount with a fractional
-- difference of up to one.
QC.forAll QC.arbitrary $ \(ds :: Money.DecimalConf,
sc0 :: Rational,
aprox :: Money.Approximation,
dis :: Money.Discrete currency unit) ->
let sc = abs sc0 + 1 -- scales less than 1 can't reliably roundtrip.
dns = Money.denseFromDiscrete dis
in Money.discreteToDecimal ds aprox dis
=== Money.denseToDecimal ds aprox dns
, HU.testCase "AdditiveGroup: zeroV" $
(AG.zeroV :: Money.Discrete currency unit) @?= Money.discrete 0
, QC.testProperty "AdditiveGroup: negateV" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
AG.negateV x === negate x
, QC.testProperty "AdditiveGroup: ^+^" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit, y) ->
x AG.^+^ y === x + y
, QC.testProperty "AdditiveGroup: ^-^" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit, y) ->
x AG.^-^ y === x - y
, QC.testProperty "VectorSpace: *^" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit, y) ->
(toInteger x VS.*^ y === x * y) .&&.
(toInteger y VS.*^ x === x * y)
, QC.testProperty "Binary encoding roundtrip" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)
in x === y
, QC.testProperty "Binary encoding roundtrip (SomeDiscrete)" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
let x' = Money.toSomeDiscrete x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (Discrete through SomeDiscrete)" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
let x' = Money.toSomeDiscrete x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x) === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (SomeDiscrete through Discrete)" $
QC.forAll QC.arbitrary $ \(x :: Money.Discrete currency unit) ->
let x' = Money.toSomeDiscrete x
bs = Binary.encode x
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
]
testExchangeRate
:: forall (src :: Symbol) (dst :: Symbol)
. (KnownSymbol src, KnownSymbol dst)
=> Proxy src
-> Proxy dst
-> Tasty.TestTree
testExchangeRate ps pd =
Tasty.testGroup ("ExchangeRate " ++ show (symbolVal ps) ++ " "
++ show (symbolVal pd))
[ QC.testProperty "Category: left identity" $
QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->
xr === id . xr
, QC.testProperty "Category: right identity" $
QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->
xr === xr . id
, QC.testProperty "Category: composition with inverse" $
QC.forAll QC.arbitrary $ \(xr1 :: Money.ExchangeRate src dst) ->
(1 === Money.exchangeRateToRational (xr1 . Money.exchangeRateRecip xr1)) .&&.
(1 === Money.exchangeRateToRational (Money.exchangeRateRecip xr1 . xr1))
, QC.testProperty "Category: composition with other" $
QC.forAll QC.arbitrary $ \(xr1 :: Money.ExchangeRate src dst,
xr2 :: Money.ExchangeRate dst src) ->
let a = Money.exchangeRateToRational xr1 * Money.exchangeRateToRational xr2
in (a === Money.exchangeRateToRational (xr1 . xr2)) .&&.
(a === Money.exchangeRateToRational (xr2 . xr1))
, QC.testProperty "read . show == id" $
QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->
xr === read (show xr)
, QC.testProperty "read . show . Just == Just" $
QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->
Just xr === read (show (Just xr))
, QC.testProperty "flipExchangeRate . flipExchangeRate == id" $
QC.forAll QC.arbitrary $ \(xr :: Money.ExchangeRate src dst) ->
let xr' = Money.exchangeRateRecip xr
in (Money.exchangeRateToRational xr /= Money.exchangeRateToRational xr')
==> (xr === Money.exchangeRateRecip xr')
, QC.testProperty "exchange (flipExchangeRate x) . exchange x == id" $
QC.forAll QC.arbitrary $
\( c0 :: Money.Dense src
, xr :: Money.ExchangeRate src dst
) -> c0 === Money.exchange (Money.exchangeRateRecip xr)
(Money.exchange xr c0)
, QC.testProperty "x == 1 ==> exchange x == id" $
QC.forAll QC.arbitrary $
\( c0 :: Money.Dense src
) -> let Just xr = Money.exchangeRate 1
in toRational c0 === toRational (Money.exchange xr c0)
, QC.testProperty "x /= 1 ==> exchange x /= id" $
QC.forAll QC.arbitrary $
\( c0 :: Money.Dense src
, xr :: Money.ExchangeRate src dst
) -> (Money.exchangeRateToRational xr /= 1 && toRational c0 /= 0)
==> (toRational c0 /= toRational (Money.exchange xr c0))
, QC.testProperty "fromSomeExchangeRate . someExchangeRate == Just" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
Just x === Money.fromSomeExchangeRate (Money.toSomeExchangeRate x)
, QC.testProperty "fromSomeExchangeRate works only for same currencies" $
QC.forAll QC.arbitrary $ \(x :: Money.SomeExchangeRate) ->
((T.unpack (Money.someExchangeRateSrcCurrency x) /= symbolVal ps) &&
(T.unpack (Money.someExchangeRateDstCurrency x) /= symbolVal pd))
==> isNothing (Money.fromSomeExchangeRate x
:: Maybe (Money.ExchangeRate src dst))
, QC.testProperty "withSomeExchangeRate" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
let dr = Money.toSomeExchangeRate x
in Money.withSomeExchangeRate dr $ \x' ->
(show x, dr) === (show x', Money.toSomeExchangeRate x')
, QC.testProperty "exchangeRateToDecimal: Same as rationalToDecimal" $
QC.forAll QC.arbitrary $ \(ds :: Money.DecimalConf,
xr :: Money.ExchangeRate src dst,
aprox :: Money.Approximation) ->
Money.exchangeRateToDecimal ds aprox xr
=== MoneyI.rationalToDecimal ds aprox
(Money.exchangeRateToRational xr)
, QC.testProperty "exchangeRateFromDecimal: Same as rationalFromDecimal" $
QC.forAll QC.arbitrary $ \(Decimal ds dec) ->
let Just r = MoneyI.rationalFromDecimal ds dec
yxr = Money.exchangeRateFromDecimal ds dec
:: Maybe (Money.ExchangeRate src dst)
in (r > 0) ==> (Just r === fmap Money.exchangeRateToRational yxr)
, QC.testProperty "Binary encoding roundtrip" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
let Right (_,_,y) = Binary.decodeOrFail (Binary.encode x)
in x === y
, QC.testProperty "Binary encoding roundtrip (SomeExchangeRate)" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
let x' = Money.toSomeExchangeRate x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (ExchangeRate through SomeExchangeRate)" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
let x' = Money.toSomeExchangeRate x
bs = Binary.encode x'
in Right (mempty, BL.length bs, x) === Binary.decodeOrFail bs
, QC.testProperty "Binary encoding roundtrip (SomeExchangeRate through ExchangeRate)" $
QC.forAll QC.arbitrary $ \(x :: Money.ExchangeRate src dst) ->
let x' = Money.toSomeExchangeRate x
bs = Binary.encode x
in Right (mempty, BL.length bs, x') === Binary.decodeOrFail bs
]
testDiscreteFromDecimal :: Tasty.TestTree
testDiscreteFromDecimal =
Tasty.testGroup "discreteFromDecimal"
[ HU.testCase "Too large" $ do
Money.discreteFromDecimal ds_dd_2 "0.053"
@?= (Nothing :: Maybe (Money.Discrete "USD" "cent"))
Money.discreteFromDecimal ds_tc_dd_2 "0.253"
@?= (Nothing :: Maybe (Money.Discrete "USD" "cent"))
, HU.testCase "USD cent, small, zero" $ do
let dis = 0 :: Money.Discrete "USD" "cent"
Money.discreteFromDecimal ds_dd_2 "0" @?= Just dis
Money.discreteFromDecimal ds_dd_2 "+0" @?= Just dis
Money.discreteFromDecimal ds_dd_2 "-0" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "0" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "+0" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "-0" @?= Just dis
, HU.testCase "USD cent, small, positive" $ do
let dis = 25 :: Money.Discrete "USD" "cent"
Money.discreteFromDecimal ds_dd_2 "0.25" @?= Just dis
Money.discreteFromDecimal ds_dd_2 "+0.25" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "0.25" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "+0.25" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "0.25" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "+0.25" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "0.25" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "+0.25" @?= Just dis
, HU.testCase "USD cent, small, negative" $ do
let dis = -25 :: Money.Discrete "USD" "cent"
Money.discreteFromDecimal ds_dd_2 "-0.25" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "-0.25" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "-0.25" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "-0.25" @?= Just dis
, HU.testCase "USD cent, big, positive" $ do
let dis = 102300456789 :: Money.Discrete "USD" "cent"
Money.discreteFromDecimal ds_dd_2 "+1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_dd_2 "1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "+1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "+1,023,004,567.89" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "1,023,004,567.89" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "+1,023,004,567.89" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "1,023,004,567.89" @?= Just dis
, HU.testCase "USD cent, big, negative" $ do
let dis = -102300456789 :: Money.Discrete "USD" "cent"
Money.discreteFromDecimal ds_dd_2 "-1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_p_dd_2 "-1023004567.89" @?= Just dis
Money.discreteFromDecimal ds_tc_dd_2 "-1,023,004,567.89" @?= Just dis
Money.discreteFromDecimal ds_p_tc_dd_2 "-1,023,004,567.89" @?= Just dis
]
testRounding
:: forall (currency :: Symbol) (unit :: Symbol)
. (Money.GoodScale (Money.UnitScale currency unit), KnownSymbol currency)
=> Proxy currency
-> Proxy unit
-> Tasty.TestTree
testRounding _ _ =
Tasty.testGroup "Rounding"
[ QC.testProperty "floor" $ QC.forAll QC.arbitrary (g (Money.discreteFromDense Money.Floor))
, QC.testProperty "ceiling" $ QC.forAll QC.arbitrary (g (Money.discreteFromDense Money.Ceiling))
, QC.testProperty "round" $ QC.forAll QC.arbitrary (g (Money.discreteFromDense Money.Round))
, QC.testProperty "truncate" $ QC.forAll QC.arbitrary (g (Money.discreteFromDense Money.Truncate))
, QC.testProperty "half-even" $ QC.forAll QC.arbitrary (g (Money.discreteFromDense Money.HalfEven))
, QC.testProperty "floor no reminder" $ QC.forAll QC.arbitrary (h (Money.discreteFromDense Money.Floor))
, QC.testProperty "ceiling no reminder" $ QC.forAll QC.arbitrary (h (Money.discreteFromDense Money.Ceiling))
, QC.testProperty "round no reminder" $ QC.forAll QC.arbitrary (h (Money.discreteFromDense Money.Round))
, QC.testProperty "truncate no reminder" $ QC.forAll QC.arbitrary (h (Money.discreteFromDense Money.Truncate))
, QC.testProperty "half-even no reminder " $ QC.forAll QC.arbitrary (h (Money.discreteFromDense Money.HalfEven))
]
where
g :: (Money.Dense currency -> (Money.Discrete' currency (Money.UnitScale currency unit), Money.Dense currency))
-> Money.Dense currency
-> QC.Property
g f = \x -> x === case f x of (y, z) -> Money.denseFromDiscrete y + z
h :: (Money.Dense currency -> (Money.Discrete' currency (Money.UnitScale currency unit), Money.Dense currency))
-> Money.Discrete currency unit
-> QC.Property
h f = \x -> (Money.denseFromDiscrete x) === case f (Money.denseFromDiscrete x) of
(y, 0) -> Money.denseFromDiscrete y
(_, _) -> error "testRounding.h: unexpected"
testHalfEvenRounding :: Tasty.TestTree
testHalfEvenRounding =
Tasty.testGroup "HalfEven rounding"
[ HU.testCase "-2.8" $ -3 @=? f (-3152519739159347 % 1125899906842624)
, HU.testCase "-2.5" $ -2 @=? f (-5 % 2)
, HU.testCase "-2.2" $ -2 @=? f (-2476979795053773 % 1125899906842624)
, HU.testCase "-2" $ -2 @=? f (-2 % 1)
, HU.testCase "-1.8" $ -2 @=? f (-8106479329266893 % 4503599627370496)
, HU.testCase "-1.5" $ -2 @=? f (-3 % 2)
, HU.testCase "-1.2" $ -1 @=? f (-5404319552844595 % 4503599627370496)
, HU.testCase "-1" $ -1 @=? f (-1 % 1)
, HU.testCase "-0.8" $ -1 @=? f (-3602879701896397 % 4503599627370496)
, HU.testCase "-0.5" $ 0 @=? f (-1 % 2)
, HU.testCase "-0.2" $ 0 @=? f (-3602879701896397 % 18014398509481984)
, HU.testCase "0" $ 0 @=? f (0 % 1)
, HU.testCase "0.2" $ 0 @=? f (3602879701896397 % 18014398509481984)
, HU.testCase "0.5" $ 0 @=? f (1 % 2)
, HU.testCase "0.8" $ 1 @=? f (3602879701896397 % 4503599627370496)
, HU.testCase "1" $ 1 @=? f (1 % 1)
, HU.testCase "1.2" $ 1 @=? f (5404319552844595 % 4503599627370496)
, HU.testCase "1.5" $ 2 @=? f (3 % 2)
, HU.testCase "1.8" $ 2 @=? f (8106479329266893 % 4503599627370496)
, HU.testCase "2" $ 2 @=? f (2 % 1)
, HU.testCase "2.2" $ 2 @=? f (2476979795053773 % 1125899906842624)
, HU.testCase "2.5" $ 2 @=? f (5 % 2)
, HU.testCase "2.8" $ 3 @=? f (3152519739159347 % 1125899906842624)
]
where
f :: Rational -> Integer
f = MoneyI.approximate MoneyI.HalfEven
-- | Decimal dot, 2 decimals
ds_dd_2 :: Money.DecimalConf
ds_dd_2 = Money.defaultDecimalConf
-- | Leading plus, decimal dot, 2 decimals
ds_p_dd_2 :: Money.DecimalConf
ds_p_dd_2 = ds_dd_2 { Money.decimalConf_leadingPlus = True }
-- | Thousands comma, decimal dot, 2 decimals
ds_tc_dd_2 :: Money.DecimalConf
ds_tc_dd_2 = ds_dd_2 { Money.decimalConf_separators = Money.separatorsDotComma }
-- | Leading plus, thousands comma, decimal dot, 2 decimals
ds_p_tc_dd_2 :: Money.DecimalConf
ds_p_tc_dd_2 = ds_tc_dd_2 { Money.decimalConf_leadingPlus = True }
-- | Decimal dot, 0 decimals
ds_dd_0 :: Money.DecimalConf
ds_dd_0 = ds_dd_2 { Money.decimalConf_digits = 0 }
-- | Leading plus, decimal dot, 0 decimals
ds_p_dd_0 :: Money.DecimalConf
ds_p_dd_0 = ds_p_dd_2 { Money.decimalConf_digits = 0 }
-- | Thousands comma, decimal dot, 0 decimals
ds_tc_dd_0 :: Money.DecimalConf
ds_tc_dd_0 = ds_tc_dd_2 { Money.decimalConf_digits = 0 }
-- | Leading plus, thousands comma, decimal dot, 0 decimals
ds_p_tc_dd_0 :: Money.DecimalConf
ds_p_tc_dd_0 = ds_p_tc_dd_2 { Money.decimalConf_digits = 0 }
--------------------------------------------------------------------------------
-- Raw parsing "golden tests"
testRawSerializations :: Tasty.TestTree
testRawSerializations =
Tasty.testGroup "Raw serializations"
[ Tasty.testGroup "binary"
[ Tasty.testGroup "encode"
[ HU.testCase "Dense" $ do
Right rawDns0 @=?
fmap (\(_,_,a) -> a) (Binary.decodeOrFail rawDns0_binary)
, HU.testCase "Discrete" $ do
Right rawDis0 @=?
fmap (\(_,_,a) -> a) (Binary.decodeOrFail rawDis0_binary)
, HU.testCase "ExchangeRate" $ do
Right rawXr0 @=?
fmap (\(_,_,a) -> a) (Binary.decodeOrFail rawXr0_binary)
]
, Tasty.testGroup "encode"
[ HU.testCase "Dense" $ rawDns0_binary @=? Binary.encode rawDns0
, HU.testCase "Discrete" $ rawDis0_binary @=? Binary.encode rawDis0
, HU.testCase "ExchangeRate" $ rawXr0_binary @=? Binary.encode rawXr0
]
]
]
rawDns0 :: Money.Dense "USD"
rawDns0 = Money.dense' (26%1)
rawDis0 :: Money.Discrete "USD" "cent"
rawDis0 = Money.discrete 4
rawXr0 :: Money.ExchangeRate "USD" "BTC"
Just rawXr0 = Money.exchangeRate (3%2)
-- binary
rawDns0_binary :: BL.ByteString
rawDns0_binary = "\NUL\NUL\NUL\NUL\NUL\NUL\NUL\ETXUSD\NUL\NUL\NUL\NUL\SUB\NUL\NUL\NUL\NUL\SOH"
rawDis0_binary :: BL.ByteString
rawDis0_binary = "\NUL\NUL\NUL\NUL\NUL\NUL\NUL\ETXUSD\NUL\NUL\NUL\NULd\NUL\NUL\NUL\NUL\SOH\NUL\NUL\NUL\NUL\EOT"
rawXr0_binary :: BL.ByteString
rawXr0_binary = "\NUL\NUL\NUL\NUL\NUL\NUL\NUL\ETXUSD\NUL\NUL\NUL\NUL\NUL\NUL\NUL\ETXBTC\NUL\NUL\NUL\NUL\ETX\NUL\NUL\NUL\NUL\STX"
--------------------------------------------------------------------------------
-- Just checking that this compiles.
_testCurrencyScale
:: Dict (Money.CurrencyScale "USD" ~ Money.UnitScale "USD" "cent",
Money.CurrencyScale "BTC" ~ Money.UnitScale "BTC" "satoshi",
Money.CurrencyScale "VUV" ~ Money.UnitScale "VUV" "vatu",
Money.CurrencyScale "XAU" ~ Money.ErrScaleNonCanonical "XAU")
_testCurrencyScale = Dict
--------------------------------------------------------------------------------
-- Misc
hush :: Either a b -> Maybe b
hush (Left _ ) = Nothing
hush (Right b) = Just b