Move the common test functions from cmd_test.go to cmd/testing/fake.go

This is so that we can use NewAPIFactory() from cmd/set/*test.go
Up until now we would get a import loop error.

This commit also adds a basic unit test case for cmd/set/set_image.go

pkg/kubectl/cmd/portforward_test.go

@@ -28,6 +28,7 @@ import (
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/apimachinery/registered"
 	"k8s.io/kubernetes/pkg/client/unversioned/fake"
+	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
 )
 
 type fakePortForwarder struct {
@@ -67,7 +68,7 @@ func testPortForward(t *testing.T, flags map[string]string, args []string) {
 	}
 	for _, test := range tests {
 		var err error
-		f, tf, codec, ns := NewAPIFactory()
+		f, tf, codec, ns := cmdtesting.NewAPIFactory()
 		tf.Client = &fake.RESTClient{
 			NegotiatedSerializer: ns,
 			Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {