format_amount - negative 0 vermeiden

Ist eine Zahl z.B. -0.002, und wird auf 2 Stellen gerundet, so wird erst
das Minuszeichen gemerkt, dann gerundet (0.00), und schießlich wird das
Minus wieder hinzugefügt, dadurch bekommt man -0.00. Mit diesem Patch
wird das Minus-Zeichen entfernt wenn die gerundete Zahl genau 0 ergibt.

diff --git a/SL/Form.pm b/SL/Form.pm
index 9045d78..35b21d5 100644 (file)
--- a/SL/Form.pm
+++ b/SL/Form.pm
@@ -822,6 +822,7 @@ sub format_amount {
   my $force_places = defined $places && $places >= 0;
 
   $amount = $self->round_amount($amount, abs $places) if $force_places;
+  $neg    = 0 if $amount == 0; # don't show negative zero
   $amount = sprintf "%.*f", ($force_places ? $places : 10), abs $amount; # 6 is default for %fa
 
   # before the sprintf amount was a number, afterwards it's a string. because of the dynamic nature of perl

diff --git a/t/form/format_amount.t b/t/form/format_amount.t
index 229c88c..8de39a2 100644 (file)
--- a/t/form/format_amount.t
+++ b/t/form/format_amount.t
@@ -51,6 +51,8 @@ is($::form->format_amount($config, 10, -2), '10,00' , 'autotrim does not harm in
 is($::form->format_amount($config, 10, 0), '10', 'autotrim does not harm integers 4');
 
 is($::form->format_amount($config, 0, 0), '0' , 'trivial zero');
+is($::form->format_amount($config, -0.002, 2), '0,00' , 'negative zero');
+is($::form->format_amount($config, -0.002, 3), '-0,002' , 'negative zero');
 
 # dash stuff