From 3e0aa0f3191a570dceb834e4036932d9af3c820e Mon Sep 17 00:00:00 2001
From: Kyle M Hall <kyle@bywatersolutions.com>
Date: Tue, 26 Jun 2018 14:31:40 +0000
Subject: [PATCH] Bug 20990: Make same changes that were made to
 outstanding_debits

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
---
 Koha/Account.pm               | 16 +++-------------
 t/db_dependent/Koha/Account.t |  6 +++++-
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/Koha/Account.pm b/Koha/Account.pm
index 1912e68ceb..82535159b6 100644
--- a/Koha/Account.pm
+++ b/Koha/Account.pm
@@ -431,19 +431,6 @@ my ( $total, $lines ) = Koha::Account->new({ patron_id => $patron_id })->outstan
 sub outstanding_credits {
     my ($self) = @_;
 
-    my $outstanding_credits = Koha::Account::Lines->search(
-        {   borrowernumber    => $self->{patron_id},
-            amountoutstanding => { '<' => 0 }
-        },
-        {   select => [ { sum => 'amountoutstanding' } ],
-            as     => ['outstanding_credits_total'],
-        }
-    );
-    my $total
-        = ( $outstanding_credits->count )
-        ? $outstanding_credits->next->get_column('outstanding_credits_total') + 0
-        : 0;
-
     my $lines = Koha::Account::Lines->search(
         {
             borrowernumber    => $self->{patron_id},
@@ -451,6 +438,9 @@ sub outstanding_credits {
         }
     );
 
+    # sum returns undef if list is empty
+    my $total = sum0( $lines->get_column('amountoutstanding') );
+
     return ( $total, $lines );
 }
 
diff --git a/t/db_dependent/Koha/Account.t b/t/db_dependent/Koha/Account.t
index 6350b165bf..28d296a094 100755
--- a/t/db_dependent/Koha/Account.t
+++ b/t/db_dependent/Koha/Account.t
@@ -85,7 +85,7 @@ subtest 'outstanding_debits() tests' => sub {
 
 subtest 'outstanding_credits() tests' => sub {
 
-    plan tests => 5;
+    plan tests => 7;
 
     $schema->storage->txn_begin;
 
@@ -109,6 +109,10 @@ subtest 'outstanding_credits() tests' => sub {
         $i++;
     }
 
+    ( $total, $lines ) =  Koha::Account->new({ patron_id => 'InvalidBorrowernumber' })->outstanding_credits();
+    is( $total, 0, "Total if no outstanding credits is 0" );
+    is( $lines->count, 0, "With no outstanding credits, we get back a Lines object with 0 lines" );
+
     $schema->storage->txn_rollback;
 };
 
-- 
2.39.5