Add test for wait with 0 timeout

Author: liggitt

test/cmd/wait.sh

@@ -105,11 +105,14 @@ EOF
     output_message_1=$(kubectl wait \
         --for='jsonpath=spec.template.spec.containers[?(@.name=="busybox")].image=busybox' \
         deploy/test-3)
+    # Command: Wait with jsonpath without value with check-once behavior
+    output_message_2=$(kubectl wait --for=jsonpath='{.status.replicas}' deploy/test-3 --timeout=0 2>&1)
     set -o errexit
 
     # Post-Condition: Wait succeed
     kube::test::if_has_string "${output_message_0}" 'deployment.apps/test-3 condition met'
     kube::test::if_has_string "${output_message_1}" 'deployment.apps/test-3 condition met'
+    kube::test::if_has_string "${output_message_2}" 'deployment.apps/test-3 condition met'
 
     # Clean deployment
     kubectl delete deployment test-3