I should probably do it this way.

zypper-wrapper.sh

@@ -5,6 +5,7 @@
 # Copyright (c) 2014 Sahal Ansari - github@sahal.info
 # License: MIT (see LICENSE)
 
+# exit if anything fails
 set -e
 
 # the scripts directory
@@ -16,14 +17,15 @@ TEMP_DIR="$DIR/logs/"
 # NOTE: if you use /tmp/ all users can read packages you (attempt to) install
 #TEMP_DIR="/tmp/"
 
-#function zypper { # used for testing on non-OpenSUSE systems
+function run_zypper { # used for testing on non-OpenSUSE systems
 #  echo "actually zypper ""$@"
-#}
+  $ZYPPER_LOCATION $@
+}
 
 # test if "$1" == "in" - if it is continue; otherwise pass everything to zypper
 # NOTE: not dealing with installing multple packages
 if [[ "$1" != "in" || "$#" != "2" ]]; then
-  $ZYPPER_LOCATION "$@"
+  run_zypper "$@"
   exit
 fi
 
@@ -36,14 +38,14 @@ else
   exit 1
 fi
 
-zypper "$@" | tee "$temp"
+run_zypper "$@" | tee "$temp"
 # if zypper does not exit with 0
 if [ " ${PIPESTATUS[0]}" -ne "0" ]; then
   # check output for ...
   #grep "'$2' not found in package names." < "$temp" &> /dev/null
   grep "No provider of '$2' found." < "$temp" &> /dev/null
   if [ "$?" -eq "0" ]; then
     # have zypper search for "$2" in packages
-    zypper se "$2"
+    run_zypper se "$2"
   fi
 fi