lib: fix tests for zero amount style (#230, #276)

hledger-lib/Hledger/Data/Amount.hs

@@ -624,13 +624,13 @@ tests_Hledger_Data_Amount = TestList $
 
   -- MixedAmount
 
-  ,"adding mixed amounts, preserving minimum precision and a single commodity on zero" ~: do
+  ,"adding mixed amounts to zero, the commodity and amount style are preserved" ~: do
     (sum $ map (Mixed . (:[]))
              [usd 1.25
-             ,usd (-1) `withPrecision` 0
+             ,usd (-1) `withPrecision` 3
              ,usd (-0.25)
              ])
-      `is` Mixed [usd 0 `withPrecision` 0]
+      `is` Mixed [usd 0 `withPrecision` 3]
 
   ,"adding mixed amounts with total prices" ~: do
     (sum $ map (Mixed . (:[]))

hledger-lib/Hledger/Reports/BalanceReport.hs

@@ -170,7 +170,7 @@ tests_balanceReport =
           showw (acct,amt) = (acct, showMixedAmountDebug amt)
       assertEqual "items" (map showw eitems) (map showw aitems)
       assertEqual "total" (showMixedAmountDebug etotal) (showMixedAmountDebug atotal)
-    usd0 = nullamt{acommodity="$"}
+    usd0 = usd 0
   in [
 
    "balanceReport with no args on null journal" ~: do

tests/misc/amount-rendering.test

@@ -46,7 +46,7 @@ hledger -f - balance
                    0
 >>>=0
 
-# 4. a zero amount is always displayed as just "0", regardless of any commodity/decimal places/price (like ledger)
+# 4. a single-commodity zero amount's commodity/decimal places/price is preserved, when possible
 #
 hledger -f- print --empty
 <<<
@@ -55,11 +55,36 @@ hledger -f- print --empty
   b
 >>>
 2010/03/01 x
-    a             0
+    a      0 @ 3EUR
     b             0
 
 >>>=0
 
+# 5.
+# When preserving a zero amount's commodity, we should also preserve
+# the amount style, such as where to place the symbol.
+# https://github.com/simonmichael/hledger/issues/230
+hledger -f- balance
+<<<
+D 1000,00€
+
+1/1
+      a:b         0
+
+1/2
+      a:1      4000,58
+      a:D     -1000,58
+      e       -3000
+>>>
+            3000,00€  a
+            4000,58€    1
+           -1000,58€    D
+           -3000,00€  e
+--------------------
+                   0
+>>>= 0
+
+
 # 5. mixed amounts with prices
 # XXX
 # hledger -f - print