From 52294139a082f00a739b4b889ead0ce072bb4f7c Mon Sep 17 00:00:00 2001
From: Colin Kuskie <colink@perldreamer.com>
Date: Thu, 19 May 2011 08:58:44 -0700
Subject: [PATCH] -0.00 ne 0.00.  Handle both cases of ~0 when checking out to
 intercept and finish the transaction immediately.

---
 docs/changelog/7.x.x.txt | 1 +
 lib/WebGUI/Shop/Cart.pm  | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/changelog/7.x.x.txt b/docs/changelog/7.x.x.txt
index 9b77c4210..28f4e994a 100644
--- a/docs/changelog/7.x.x.txt
+++ b/docs/changelog/7.x.x.txt
@@ -1,4 +1,5 @@
 7.10.17
+ - fixed: Forced to use a PayDriver even with a balance of 0 in the cart.
 
 7.10.16
  - fixed #12121: typ-o Asset_Map.templateIdEditPoint
diff --git a/lib/WebGUI/Shop/Cart.pm b/lib/WebGUI/Shop/Cart.pm
index 9a16ae3ef..62cb80878 100644
--- a/lib/WebGUI/Shop/Cart.pm
+++ b/lib/WebGUI/Shop/Cart.pm
@@ -925,7 +925,7 @@ sub www_checkout {
         my $total = $self->calculateTotal;
         ##Handle rounding errors, and checkout immediately if the amount is 0 since
         ##at least the ITransact driver won't accept $0 checkout.
-        if (sprintf('%.2f', $total + $self->calculateShopCreditDeduction($total)) eq '0.00') {
+        if (sprintf('%.2f', abs($total + $self->calculateShopCreditDeduction($total))) eq '0.00') {
             my $transaction = WebGUI::Shop::Transaction->create($session, {cart => $self});
             $transaction->completePurchase('zero', 'success', 'success');
             $self->onCompletePurchase;