mirror of
https://github.com/simonmichael/hledger.git
synced 2024-11-15 00:27:46 +03:00
488 lines
20 KiB
Haskell
488 lines
20 KiB
Haskell
{-# LANGUAGE StandaloneDeriving #-}
|
|
{-|
|
|
A simple 'Amount' is some quantity of money, shares, or anything else.
|
|
It has a (possibly null) 'Commodity' and a numeric quantity:
|
|
|
|
@
|
|
$1
|
|
£-50
|
|
EUR 3.44
|
|
GOOG 500
|
|
1.5h
|
|
90 apples
|
|
0
|
|
@
|
|
|
|
It may also have an assigned 'Price', representing this amount's per-unit
|
|
or total cost in a different commodity. If present, this is rendered like
|
|
so:
|
|
|
|
@
|
|
EUR 2 \@ $1.50 (unit price)
|
|
EUR 2 \@\@ $3 (total price)
|
|
@
|
|
|
|
A 'MixedAmount' is zero or more simple amounts, so can represent multiple
|
|
commodities; this is the type most often used:
|
|
|
|
@
|
|
0
|
|
$50 + EUR 3
|
|
16h + $13.55 + AAPL 500 + 6 oranges
|
|
@
|
|
|
|
When a mixed amount has been \"normalised\", it has no more than one amount
|
|
in each commodity and no zero amounts; or it has just a single zero amount
|
|
and no others.
|
|
|
|
Limited arithmetic with simple and mixed amounts is supported, best used
|
|
with similar amounts since it mostly ignores assigned prices and commodity
|
|
exchange rates.
|
|
|
|
-}
|
|
|
|
module Hledger.Data.Amount (
|
|
-- * Amount
|
|
nullamt,
|
|
missingamt,
|
|
amountWithCommodity,
|
|
canonicaliseAmountCommodity,
|
|
setAmountPrecision,
|
|
-- ** arithmetic
|
|
costOfAmount,
|
|
divideAmount,
|
|
-- ** rendering
|
|
showAmount,
|
|
showAmountDebug,
|
|
showAmountWithoutPrice,
|
|
maxprecision,
|
|
maxprecisionwithpoint,
|
|
-- * MixedAmount
|
|
nullmixedamt,
|
|
missingmixedamt,
|
|
amounts,
|
|
normaliseMixedAmountPreservingFirstPrice,
|
|
canonicaliseMixedAmountCommodity,
|
|
mixedAmountWithCommodity,
|
|
setMixedAmountPrecision,
|
|
-- ** arithmetic
|
|
costOfMixedAmount,
|
|
divideMixedAmount,
|
|
isNegativeMixedAmount,
|
|
isZeroMixedAmount,
|
|
isReallyZeroMixedAmountCost,
|
|
-- ** rendering
|
|
showMixedAmount,
|
|
showMixedAmountDebug,
|
|
showMixedAmountWithoutPrice,
|
|
showMixedAmountWithPrecision,
|
|
-- * misc.
|
|
tests_Hledger_Data_Amount
|
|
) where
|
|
|
|
import Data.Char (isDigit)
|
|
import Data.List
|
|
import Data.Map (findWithDefault)
|
|
import Test.HUnit
|
|
import Text.Printf
|
|
import qualified Data.Map as Map
|
|
|
|
import Hledger.Data.Types
|
|
import Hledger.Data.Commodity
|
|
import Hledger.Utils
|
|
|
|
|
|
deriving instance Show HistoricalPrice
|
|
|
|
-------------------------------------------------------------------------------
|
|
-- Amount
|
|
|
|
instance Show Amount where show = showAmountDebug
|
|
|
|
instance Num Amount where
|
|
abs (Amount c q p) = Amount c (abs q) p
|
|
signum (Amount c q p) = Amount c (signum q) p
|
|
fromInteger i = Amount (comm "") (fromInteger i) Nothing
|
|
negate a@Amount{quantity=q} = a{quantity=(-q)}
|
|
(+) = similarAmountsOp (+)
|
|
(-) = similarAmountsOp (-)
|
|
(*) = similarAmountsOp (*)
|
|
|
|
-- | The empty simple amount.
|
|
nullamt :: Amount
|
|
nullamt = Amount unknown 0 Nothing
|
|
|
|
-- | Apply a binary arithmetic operator to two amounts, ignoring and
|
|
-- discarding any assigned prices, and converting the first to the
|
|
-- commodity of the second in a simplistic way (1-1 exchange rate).
|
|
-- The highest precision of either amount is preserved in the result.
|
|
similarAmountsOp :: (Double -> Double -> Double) -> Amount -> Amount -> Amount
|
|
similarAmountsOp op a@(Amount Commodity{precision=ap} _ _) (Amount bc@Commodity{precision=bp} bq _) =
|
|
Amount bc{precision=max ap bp} (quantity (amountWithCommodity bc a) `op` bq) Nothing
|
|
|
|
-- | Convert an amount to the specified commodity, ignoring and discarding
|
|
-- any assigned prices and assuming an exchange rate of 1.
|
|
amountWithCommodity :: Commodity -> Amount -> Amount
|
|
amountWithCommodity c (Amount _ q _) = Amount c q Nothing
|
|
|
|
-- | Convert an amount to the commodity of its assigned price, if any. Notes:
|
|
--
|
|
-- - price amounts must be MixedAmounts with exactly one component Amount (or there will be a runtime error)
|
|
--
|
|
-- - price amounts should be positive, though this is not currently enforced
|
|
costOfAmount :: Amount -> Amount
|
|
costOfAmount a@(Amount _ q price) =
|
|
case price of
|
|
Nothing -> a
|
|
Just (UnitPrice (Mixed [Amount pc pq Nothing])) -> Amount pc (pq*q) Nothing
|
|
Just (TotalPrice (Mixed [Amount pc pq Nothing])) -> Amount pc (pq*signum q) Nothing
|
|
_ -> error' "costOfAmount: Malformed price encountered, programmer error"
|
|
|
|
-- | Divide an amount's quantity by a constant.
|
|
divideAmount :: Amount -> Double -> Amount
|
|
divideAmount a@Amount{quantity=q} d = a{quantity=q/d}
|
|
|
|
-- | Is this amount negative ? The price is ignored.
|
|
isNegativeAmount :: Amount -> Bool
|
|
isNegativeAmount Amount{quantity=q} = q < 0
|
|
|
|
-- | Does this amount appear to be zero when displayed with its given precision ?
|
|
isZeroAmount :: Amount -> Bool
|
|
isZeroAmount a -- a==missingamt = False
|
|
| otherwise = (null . filter (`elem` "123456789") . showAmountWithoutPriceOrCommodity) a
|
|
|
|
-- | Is this amount "really" zero, regardless of the display precision ?
|
|
-- Since we are using floating point, for now just test to some high precision.
|
|
isReallyZeroAmount :: Amount -> Bool
|
|
isReallyZeroAmount a -- a==missingamt = False
|
|
| otherwise = (null . filter (`elem` "123456789") . printf ("%."++show zeroprecision++"f") . quantity) a
|
|
where zeroprecision = 8
|
|
|
|
-- | Get the string representation of an amount, based on its commodity's
|
|
-- display settings except using the specified precision.
|
|
showAmountWithPrecision :: Int -> Amount -> String
|
|
showAmountWithPrecision p = showAmount . setAmountPrecision p
|
|
|
|
-- | Set the display precision in the amount's commodity.
|
|
setAmountPrecision :: Int -> Amount -> Amount
|
|
setAmountPrecision p a@Amount{commodity=c} = a{commodity=c{precision=p}}
|
|
|
|
-- | Get the unambiguous string representation of an amount, for debugging.
|
|
showAmountDebug :: Amount -> String
|
|
showAmountDebug (Amount (Commodity {symbol="AUTO"}) _ _) = "(missing)"
|
|
showAmountDebug (Amount c q pri) = printf "Amount {commodity = %s, quantity = %s, price = %s}"
|
|
(show c) (show q) (maybe "Nothing" showPriceDebug pri)
|
|
|
|
-- | Get the string representation of an amount, without any \@ price.
|
|
showAmountWithoutPrice :: Amount -> String
|
|
showAmountWithoutPrice a = showAmount a{price=Nothing}
|
|
|
|
-- | Get the string representation of an amount, without any price or commodity symbol.
|
|
showAmountWithoutPriceOrCommodity :: Amount -> String
|
|
showAmountWithoutPriceOrCommodity a@Amount{commodity=c} = showAmount a{commodity=c{symbol=""}, price=Nothing}
|
|
|
|
showPrice :: Price -> String
|
|
showPrice (UnitPrice pa) = " @ " ++ showMixedAmount pa
|
|
showPrice (TotalPrice pa) = " @@ " ++ showMixedAmount pa
|
|
|
|
showPriceDebug :: Price -> String
|
|
showPriceDebug (UnitPrice pa) = " @ " ++ showMixedAmountDebug pa
|
|
showPriceDebug (TotalPrice pa) = " @@ " ++ showMixedAmountDebug pa
|
|
|
|
-- | Get the string representation of an amount, based on its commodity's
|
|
-- display settings. String representations equivalent to zero are
|
|
-- converted to just \"0\".
|
|
showAmount :: Amount -> String
|
|
showAmount (Amount (Commodity {symbol="AUTO"}) _ _) = ""
|
|
showAmount a@(Amount (Commodity {symbol=sym,side=side,spaced=spaced}) _ pri) =
|
|
case side of
|
|
L -> printf "%s%s%s%s" sym' space quantity' price
|
|
R -> printf "%s%s%s%s" quantity' space sym' price
|
|
where
|
|
quantity = showamountquantity a
|
|
displayingzero = null $ filter (`elem` "123456789") $ quantity
|
|
(quantity',sym') | displayingzero = ("0","")
|
|
| otherwise = (quantity,quoteCommoditySymbolIfNeeded sym)
|
|
space = if (not (null sym') && spaced) then " " else ""
|
|
price = maybe "" showPrice pri
|
|
|
|
-- | Get the string representation of the number part of of an amount,
|
|
-- using the display settings from its commodity.
|
|
showamountquantity :: Amount -> String
|
|
showamountquantity (Amount (Commodity {decimalpoint=d,precision=p,separator=s,separatorpositions=spos}) q _) =
|
|
punctuatenumber d s spos $ qstr
|
|
where
|
|
-- isint n = fromIntegral (round n) == n
|
|
qstr -- p == maxprecision && isint q = printf "%d" (round q::Integer)
|
|
| p == maxprecisionwithpoint = printf "%f" q
|
|
| p == maxprecision = chopdotzero $ printf "%f" q
|
|
| otherwise = printf ("%."++show p++"f") q
|
|
|
|
-- | Replace a number string's decimal point with the specified character,
|
|
-- and add the specified digit group separators.
|
|
punctuatenumber :: Char -> Char -> [Int] -> String -> String
|
|
punctuatenumber dec sep grps str = sign ++ reverse (addseps sep (extend grps) (reverse int)) ++ frac''
|
|
where
|
|
(sign,num) = break isDigit str
|
|
(int,frac) = break (=='.') num
|
|
frac' = dropWhile (=='.') frac
|
|
frac'' | null frac' = ""
|
|
| otherwise = dec:frac'
|
|
extend [] = []
|
|
extend gs = init gs ++ repeat (last gs)
|
|
addseps _ [] str = str
|
|
addseps sep (g:gs) str
|
|
| length str <= g = str
|
|
| otherwise = let (s,rest) = splitAt g str
|
|
in s ++ [sep] ++ addseps sep gs rest
|
|
|
|
chopdotzero str = reverse $ case reverse str of
|
|
'0':'.':s -> s
|
|
s -> s
|
|
|
|
-- | For rendering: a special precision value which means show all available digits.
|
|
maxprecision :: Int
|
|
maxprecision = 999998
|
|
|
|
-- | For rendering: a special precision value which forces display of a decimal point.
|
|
maxprecisionwithpoint :: Int
|
|
maxprecisionwithpoint = 999999
|
|
|
|
-- | Replace an amount's commodity with the canonicalised version from
|
|
-- the provided commodity map.
|
|
canonicaliseAmountCommodity :: Maybe (Map.Map String Commodity) -> Amount -> Amount
|
|
canonicaliseAmountCommodity Nothing = id
|
|
canonicaliseAmountCommodity (Just canonicalcommoditymap) = fixamount
|
|
where
|
|
-- like journalCanonicaliseAmounts
|
|
fixamount a@Amount{commodity=c} = a{commodity=fixcommodity c}
|
|
fixcommodity c@Commodity{symbol=s} = findWithDefault c s canonicalcommoditymap
|
|
|
|
-------------------------------------------------------------------------------
|
|
-- MixedAmount
|
|
|
|
instance Show MixedAmount where show = showMixedAmountDebug
|
|
|
|
instance Num MixedAmount where
|
|
fromInteger i = Mixed [Amount (comm "") (fromInteger i) Nothing]
|
|
negate (Mixed as) = Mixed $ map negate as
|
|
(+) (Mixed as) (Mixed bs) = normaliseMixedAmountPreservingPrices $ Mixed $ as ++ bs
|
|
(*) = error' "programming error, mixed amounts do not support multiplication"
|
|
abs = error' "programming error, mixed amounts do not support abs"
|
|
signum = error' "programming error, mixed amounts do not support signum"
|
|
|
|
-- | The empty mixed amount.
|
|
nullmixedamt :: MixedAmount
|
|
nullmixedamt = Mixed []
|
|
|
|
-- | A temporary value for parsed transactions which had no amount specified.
|
|
missingamt :: Amount
|
|
missingamt = Amount unknown{symbol="AUTO"} 0 Nothing
|
|
|
|
missingmixedamt :: MixedAmount
|
|
missingmixedamt = Mixed [missingamt]
|
|
|
|
-- | Simplify a mixed amount's component amounts: combine amounts with the
|
|
-- same commodity and price. Also remove any zero or missing amounts and
|
|
-- replace an empty amount list with a single zero amount.
|
|
normaliseMixedAmountPreservingPrices :: MixedAmount -> MixedAmount
|
|
normaliseMixedAmountPreservingPrices (Mixed as) = Mixed as''
|
|
where
|
|
as'' = if null nonzeros then [nullamt] else nonzeros
|
|
(_,nonzeros) = partition isReallyZeroAmount $ filter (/= missingamt) as'
|
|
as' = map sumAmountsUsingFirstPrice $ group $ sort as
|
|
sort = sortBy (\a1 a2 -> compare (sym a1,price a1) (sym a2,price a2))
|
|
group = groupBy (\a1 a2 -> sym a1 == sym a2 && price a1 == price a2)
|
|
sym = symbol . commodity
|
|
|
|
tests_normaliseMixedAmountPreservingPrices = [
|
|
"normaliseMixedAmountPreservingPrices" ~: do
|
|
-- assertEqual "" (Mixed [dollars 2]) (normaliseMixedAmountPreservingPrices $ Mixed [dollars 0, dollars 2])
|
|
assertEqual "" (Mixed [nullamt]) (normaliseMixedAmountPreservingPrices $ Mixed [dollars 0, missingamt])
|
|
]
|
|
|
|
-- | Simplify a mixed amount's component amounts: combine amounts with
|
|
-- the same commodity, using the first amount's price for subsequent
|
|
-- amounts in each commodity (ie, this function alters the amount and
|
|
-- is best used as a rendering helper.). Also remove any zero amounts
|
|
-- and replace an empty amount list with a single zero amount.
|
|
normaliseMixedAmountPreservingFirstPrice :: MixedAmount -> MixedAmount
|
|
normaliseMixedAmountPreservingFirstPrice (Mixed as) = Mixed as''
|
|
where
|
|
as'' = if null nonzeros then [nullamt] else nonzeros
|
|
(_,nonzeros) = partition (\a -> isReallyZeroAmount a && a /= missingamt) as'
|
|
as' = map sumAmountsUsingFirstPrice $ group $ sort as
|
|
sort = sortBy (\a1 a2 -> compare (sym a1) (sym a2))
|
|
group = groupBy (\a1 a2 -> sym a1 == sym a2)
|
|
sym = symbol . commodity
|
|
|
|
-- discardPrice :: Amount -> Amount
|
|
-- discardPrice a = a{price=Nothing}
|
|
|
|
-- discardPrices :: MixedAmount -> MixedAmount
|
|
-- discardPrices (Mixed as) = Mixed $ map discardPrice as
|
|
|
|
sumAmountsUsingFirstPrice [] = nullamt
|
|
sumAmountsUsingFirstPrice as = (sum as){price=price $ head as}
|
|
|
|
-- | Get a mixed amount's component amounts.
|
|
amounts :: MixedAmount -> [Amount]
|
|
amounts (Mixed as) = as
|
|
|
|
-- | Convert a mixed amount's component amounts to the commodity of their
|
|
-- assigned price, if any.
|
|
costOfMixedAmount :: MixedAmount -> MixedAmount
|
|
costOfMixedAmount (Mixed as) = Mixed $ map costOfAmount as
|
|
|
|
-- | Divide a mixed amount's quantities by a constant.
|
|
divideMixedAmount :: MixedAmount -> Double -> MixedAmount
|
|
divideMixedAmount (Mixed as) d = Mixed $ map (flip divideAmount d) as
|
|
|
|
-- | Is this mixed amount negative, if it can be normalised to a single commodity ?
|
|
isNegativeMixedAmount :: MixedAmount -> Maybe Bool
|
|
isNegativeMixedAmount m = case as of [a] -> Just $ isNegativeAmount a
|
|
_ -> Nothing
|
|
where as = amounts $ normaliseMixedAmountPreservingFirstPrice m
|
|
|
|
-- | Does this mixed amount appear to be zero when displayed with its given precision ?
|
|
isZeroMixedAmount :: MixedAmount -> Bool
|
|
isZeroMixedAmount = all isZeroAmount . amounts . normaliseMixedAmountPreservingFirstPrice
|
|
|
|
-- | Is this mixed amount "really" zero ? See isReallyZeroAmount.
|
|
isReallyZeroMixedAmount :: MixedAmount -> Bool
|
|
isReallyZeroMixedAmount = all isReallyZeroAmount . amounts . normaliseMixedAmountPreservingFirstPrice
|
|
|
|
-- | Is this mixed amount "really" zero, after converting to cost
|
|
-- commodities where possible ?
|
|
isReallyZeroMixedAmountCost :: MixedAmount -> Bool
|
|
isReallyZeroMixedAmountCost = isReallyZeroMixedAmount . costOfMixedAmount
|
|
|
|
-- -- | Convert a mixed amount to the specified commodity, assuming an exchange rate of 1.
|
|
mixedAmountWithCommodity :: Commodity -> MixedAmount -> Amount
|
|
mixedAmountWithCommodity c (Mixed as) = Amount c total Nothing
|
|
where
|
|
total = sum $ map (quantity . amountWithCommodity c) as
|
|
|
|
-- -- | MixedAmount derived Eq instance in Types.hs doesn't know that we
|
|
-- -- want $0 = EUR0 = 0. Yet we don't want to drag all this code over there.
|
|
-- -- For now, use this when cross-commodity zero equality is important.
|
|
-- mixedAmountEquals :: MixedAmount -> MixedAmount -> Bool
|
|
-- mixedAmountEquals a b = amounts a' == amounts b' || (isZeroMixedAmount a' && isZeroMixedAmount b')
|
|
-- where a' = normaliseMixedAmountPreservingFirstPrice a
|
|
-- b' = normaliseMixedAmountPreservingFirstPrice b
|
|
|
|
-- | Get the string representation of a mixed amount, showing each of
|
|
-- its component amounts. NB a mixed amount can have an empty amounts
|
|
-- list in which case it shows as \"\".
|
|
showMixedAmount :: MixedAmount -> String
|
|
showMixedAmount m = vConcatRightAligned $ map showAmount $ amounts $ normaliseMixedAmountPreservingFirstPrice m
|
|
|
|
-- | Set the display precision in the amount's commodities.
|
|
setMixedAmountPrecision :: Int -> MixedAmount -> MixedAmount
|
|
setMixedAmountPrecision p (Mixed as) = Mixed $ map (setAmountPrecision p) as
|
|
|
|
-- | Get the string representation of a mixed amount, showing each of its
|
|
-- component amounts with the specified precision, ignoring their
|
|
-- commoditys' display precision settings.
|
|
showMixedAmountWithPrecision :: Int -> MixedAmount -> String
|
|
showMixedAmountWithPrecision p m =
|
|
vConcatRightAligned $ map (showAmountWithPrecision p) $ amounts $ normaliseMixedAmountPreservingFirstPrice m
|
|
|
|
-- | Get an unambiguous string representation of a mixed amount for debugging.
|
|
showMixedAmountDebug :: MixedAmount -> String
|
|
showMixedAmountDebug m | m == missingmixedamt = "(missing)"
|
|
| otherwise = printf "Mixed [%s]" as
|
|
where as = intercalate "\n " $ map showAmountDebug $ amounts m -- normaliseMixedAmountPreservingFirstPrice m
|
|
|
|
-- | Get the string representation of a mixed amount, but without
|
|
-- any \@ prices.
|
|
showMixedAmountWithoutPrice :: MixedAmount -> String
|
|
showMixedAmountWithoutPrice m = concat $ intersperse "\n" $ map showfixedwidth as
|
|
where
|
|
(Mixed as) = normaliseMixedAmountPreservingFirstPrice $ stripPrices m
|
|
stripPrices (Mixed as) = Mixed $ map stripprice as where stripprice a = a{price=Nothing}
|
|
width = maximum $ map (length . showAmount) as
|
|
showfixedwidth = printf (printf "%%%ds" width) . showAmountWithoutPrice
|
|
|
|
-- | Replace a mixed amount's commodity with the canonicalised version from
|
|
-- the provided commodity map.
|
|
canonicaliseMixedAmountCommodity :: Maybe (Map.Map String Commodity) -> MixedAmount -> MixedAmount
|
|
canonicaliseMixedAmountCommodity canonicalcommoditymap (Mixed as) = Mixed $ map (canonicaliseAmountCommodity canonicalcommoditymap) as
|
|
|
|
-------------------------------------------------------------------------------
|
|
-- misc
|
|
|
|
tests_Hledger_Data_Amount = TestList $
|
|
tests_normaliseMixedAmountPreservingPrices
|
|
++ [
|
|
|
|
-- Amount
|
|
|
|
"costOfAmount" ~: do
|
|
costOfAmount (euros 1) `is` euros 1
|
|
costOfAmount (euros 2){price=Just $ UnitPrice $ Mixed [dollars 2]} `is` dollars 4
|
|
costOfAmount (euros 1){price=Just $ TotalPrice $ Mixed [dollars 2]} `is` dollars 2
|
|
costOfAmount (euros (-1)){price=Just $ TotalPrice $ Mixed [dollars 2]} `is` dollars (-2)
|
|
|
|
,"isZeroAmount" ~: do
|
|
assertBool "" $ isZeroAmount $ Amount unknown 0 Nothing
|
|
assertBool "" $ isZeroAmount $ dollars 0
|
|
|
|
,"negating amounts" ~: do
|
|
let a = dollars 1
|
|
negate a `is` a{quantity=(-1)}
|
|
let b = (dollars 1){price=Just $ UnitPrice $ Mixed [euros 2]}
|
|
negate b `is` b{quantity=(-1)}
|
|
|
|
,"adding amounts" ~: do
|
|
let a1 = dollars 1.23
|
|
let a2 = dollars (-1.23)
|
|
let a3 = dollars (-1.23)
|
|
(a1 + a2) `is` Amount (comm "$") 0 Nothing
|
|
(a1 + a3) `is` Amount (comm "$") 0 Nothing
|
|
(a2 + a3) `is` Amount (comm "$") (-2.46) Nothing
|
|
(a3 + a3) `is` Amount (comm "$") (-2.46) Nothing
|
|
sum [a1,a2,a3,-a3] `is` Amount (comm "$") 0 Nothing
|
|
-- highest precision is preserved
|
|
let ap1 = (dollars 1){commodity=dollar{precision=1}}
|
|
ap3 = (dollars 1){commodity=dollar{precision=3}}
|
|
(sum [ap1,ap3]) `is` ap3{quantity=2}
|
|
(sum [ap3,ap1]) `is` ap3{quantity=2}
|
|
-- adding different commodities assumes conversion rate 1
|
|
assertBool "" $ isZeroAmount (a1 - euros 1.23)
|
|
|
|
,"showAmount" ~: do
|
|
showAmount (dollars 0 + pounds 0) `is` "0"
|
|
|
|
-- MixedAmount
|
|
|
|
,"normaliseMixedAmountPreservingFirstPrice" ~: do
|
|
normaliseMixedAmountPreservingFirstPrice (Mixed []) `is` Mixed [nullamt]
|
|
assertBool "" $ isZeroMixedAmount $ normaliseMixedAmountPreservingFirstPrice (Mixed [Amount {commodity=dollar, quantity=10, price=Nothing}
|
|
,Amount {commodity=dollar, quantity=10, price=Just (TotalPrice (Mixed [Amount {commodity=euro, quantity=7, price=Nothing}]))}
|
|
,Amount {commodity=dollar, quantity=(-10), price=Nothing}
|
|
,Amount {commodity=dollar, quantity=(-10), price=Just (TotalPrice (Mixed [Amount {commodity=euro, quantity=7, price=Nothing}]))}
|
|
])
|
|
|
|
,"adding mixed amounts" ~: do
|
|
let dollar0 = dollar{precision=0}
|
|
(sum $ map (Mixed . (\a -> [a]))
|
|
[Amount dollar 1.25 Nothing,
|
|
Amount dollar0 (-1) Nothing,
|
|
Amount dollar (-0.25) Nothing])
|
|
`is` Mixed [Amount unknown 0 Nothing]
|
|
|
|
,"showMixedAmount" ~: do
|
|
showMixedAmount (Mixed [dollars 1]) `is` "$1.00"
|
|
showMixedAmount (Mixed [(dollars 1){price=Just $ UnitPrice $ Mixed [euros 2]}]) `is` "$1.00 @ €2.00"
|
|
showMixedAmount (Mixed [dollars 0]) `is` "0"
|
|
showMixedAmount (Mixed []) `is` "0"
|
|
showMixedAmount missingmixedamt `is` ""
|
|
|
|
,"showMixedAmountWithoutPrice" ~: do
|
|
let a = (dollars 1){price=Just $ UnitPrice $ Mixed [euros 2]}
|
|
showMixedAmountWithoutPrice (Mixed [a]) `is` "$1.00"
|
|
showMixedAmountWithoutPrice (Mixed [a, (-a)]) `is` "0"
|
|
|
|
]
|