Add networking fuzzer

Signed-off-by: Christopher M. Luciano <cmluciano@us.ibm.com>

pkg/api/testing/fuzzer.go

@@ -19,7 +19,7 @@ package testing
 import (
 	"fmt"
 
-	"github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 
 	"k8s.io/api/core/v1"
 	apitesting "k8s.io/apimachinery/pkg/api/testing"
@@ -38,6 +38,7 @@ import (
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	extensionsfuzzer "k8s.io/kubernetes/pkg/apis/extensions/fuzzer"
 	extensionsv1beta1 "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	networkingfuzzer "k8s.io/kubernetes/pkg/apis/networking/fuzzer"
 	policyfuzzer "k8s.io/kubernetes/pkg/apis/policy/fuzzer"
 	rbacfuzzer "k8s.io/kubernetes/pkg/apis/rbac/fuzzer"
 	storagefuzzer "k8s.io/kubernetes/pkg/apis/storage/fuzzer"
@@ -102,4 +103,5 @@ var FuzzerFuncs = fuzzer.MergeFuzzerFuncs(
 	certificatesfuzzer.Funcs,
 	admissionregistrationfuzzer.Funcs,
 	storagefuzzer.Funcs,
+	networkingfuzzer.Funcs,
 )

pkg/apis/networking/fuzzer/fuzzer.go

@@ -17,10 +17,24 @@ limitations under the License.
 package fuzzer
 
 import (
+	fuzz "github.com/google/gofuzz"
 	runtimeserializer "k8s.io/apimachinery/pkg/runtime/serializer"
+	"k8s.io/kubernetes/pkg/apis/networking"
 )
 
 // Funcs returns the fuzzer functions for the networking api group.
 var Funcs = func(codecs runtimeserializer.CodecFactory) []interface{} {
-	return []interface{}{}
+	return []interface{}{
+		func(np *networking.NetworkPolicyPeer, c fuzz.Continue) {
+			c.FuzzNoCustom(np) // fuzz self without calling this function again
+			// TODO: Implement a fuzzer to generate valid keys, values and operators for
+			// selector requirements.
+			if np.IPBlock != nil {
+				np.IPBlock = &networking.IPBlock{
+					CIDR:   "192.168.1.0/24",
+					Except: []string{"192.168.1.1/24", "192.168.1.2/24"},
+				}
+			}
+		},
+	}
 }