Move watch/versioned to pkg/apis/meta/v1/watch.go

Move the encoder and decoder to restclient since it is generic to that
package.

pkg/client/restclient/watch/encoder_test.go

@@ -0,0 +1,78 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package versioned_test
+
+import (
+	"bytes"
+	"io/ioutil"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/testapi"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/runtime/serializer/streaming"
+	"k8s.io/kubernetes/pkg/watch"
+	"k8s.io/kubernetes/pkg/watch/versioned"
+)
+
+func TestEncodeDecodeRoundTrip(t *testing.T) {
+	testCases := []struct {
+		Type   watch.EventType
+		Object runtime.Object
+		Codec  runtime.Codec
+	}{
+		{
+			watch.Added,
+			&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}},
+			testapi.Default.Codec(),
+		},
+		{
+			watch.Modified,
+			&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}},
+			testapi.Default.Codec(),
+		},
+		{
+			watch.Deleted,
+			&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}},
+			testapi.Default.Codec(),
+		},
+	}
+	for i, testCase := range testCases {
+		buf := &bytes.Buffer{}
+
+		codec := testCase.Codec
+		encoder := versioned.NewEncoder(streaming.NewEncoder(buf, codec), codec)
+		if err := encoder.Encode(&watch.Event{Type: testCase.Type, Object: testCase.Object}); err != nil {
+			t.Errorf("%d: unexpected error: %v", i, err)
+			continue
+		}
+
+		rc := ioutil.NopCloser(buf)
+		decoder := versioned.NewDecoder(streaming.NewDecoder(rc, codec), codec)
+		event, obj, err := decoder.Decode()
+		if err != nil {
+			t.Errorf("%d: unexpected error: %v", i, err)
+			continue
+		}
+		if !api.Semantic.DeepDerivative(testCase.Object, obj) {
+			t.Errorf("%d: expected %#v, got %#v", i, testCase.Object, obj)
+		}
+		if event != testCase.Type {
+			t.Errorf("%d: unexpected type: %#v", i, event)
+		}
+	}
+}