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lib: showTransaction: fix a case showing multiple missing amounts

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Noticed by peti: showTransaction could sometimes hide the last posting's
amount even if one of the other posting amounts was already implcit,
producing invalid transaction output.
This commit is contained in:
Simon Michael 2018-10-22 07:23:40 -07:00
parent b5a90432ff
commit 0d531bb24f
1 changed files with 17 additions and 3 deletions
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20
hledger-lib/Hledger/Data/Transaction.hs
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@ -117,7 +117,8 @@ To facilitate this, postings with explicit multi-commodity amounts
are displayed as multiple similar postings, one per commodity.
(Normally does not happen with this function).
If there are multiple postings and the transaction appears obviously balanced
If there are multiple postings, all with explicit amounts,
and the transaction appears obviously balanced
(postings sum to 0, without needing to infer conversion prices),
the last posting's amount will not be shown.
-}
@ -171,7 +172,8 @@ renderCommentLines t = case lines $ T.unpack t of ("":ls) -> "":map commentpref
-- for `print` output.
--
-- Explicit amounts are shown, implicit amounts are not.
-- If elide is true and there are multiple postings and the transaction appears obviously balanced
-- If elide is true and there are multiple postings, all with explicit amounts,
-- and the transaction appears obviously balanced
-- (postings sum to 0, without needing to infer conversion prices),
-- the last posting's amount will be made implicit (and not shown).
--
@ -188,7 +190,7 @@ renderCommentLines t = case lines $ T.unpack t of ("":ls) -> "":map commentpref
--
postingsAsLines :: Bool -> Bool -> Transaction -> [Posting] -> [String]
postingsAsLines elide onelineamounts t ps
| elide && length ps > 1 && isTransactionBalanced Nothing t -- imprecise balanced check
| elide && length ps > 1 && all hasAmount ps && isTransactionBalanced Nothing t -- imprecise balanced check
= (concatMap (postingAsLines False onelineamounts ps) $ init ps) ++ postingAsLines True onelineamounts ps (last ps)
| otherwise = concatMap (postingAsLines False onelineamounts ps) ps
@ -571,6 +573,12 @@ tests_Transaction = tests "Transaction" [
"a" `post` usd 1,
"b" `post` hrs (-1)
]}
-- one missing amount, not the last one
t3 = nulltransaction{tpostings=[
"a" `post` usd 1
,"b" `post` missingamt
,"c" `post` usd (-1)
]}
in
tests "postingsAsLines" [
@ -619,6 +627,12 @@ tests_Transaction = tests "Transaction" [
," b -1.00h" -- explicit amount remains explicit since a conversion price would have be inferred to balance
]
,test "implicit-amount-not-last" $
let t = t3 in postingsAsLines True False t (tpostings t) `is` [
" a $1.00"
," b"
," c $-1.00"
]
]
,do