Test runtime.Object <-> map[string]interface{} conversion

pkg/api/BUILD

@@ -74,6 +74,7 @@ go_test(
         "meta_test.go",
         "serialization_proto_test.go",
         "serialization_test.go",
+        "unstructured_test.go",
     ],
     tags = ["automanaged"],
     deps = [
@@ -99,6 +100,7 @@ go_test(
         "//vendor:k8s.io/apimachinery/pkg/runtime/serializer/streaming",
         "//vendor:k8s.io/apimachinery/pkg/types",
         "//vendor:k8s.io/apimachinery/pkg/util/diff",
+        "//vendor:k8s.io/apimachinery/pkg/util/json",
         "//vendor:k8s.io/apimachinery/pkg/util/sets",
         "//vendor:k8s.io/apimachinery/pkg/watch",
     ],

pkg/api/serialization_test.go

@@ -518,7 +518,7 @@ const benchmarkSeed = 100
 
 func benchmarkItems() []v1.Pod {
 	apiObjectFuzzer := apitesting.FuzzerFor(nil, api.SchemeGroupVersion, rand.NewSource(benchmarkSeed))
-	items := make([]v1.Pod, 2)
+	items := make([]v1.Pod, 10)
 	for i := range items {
 		var pod api.Pod
 		apiObjectFuzzer.Fuzz(&pod)

pkg/api/unstructured_test.go

@@ -0,0 +1,180 @@
+/*
+Copyright 2017 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 api_test
+
+import (
+	"math/rand"
+	"reflect"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/testapi"
+	apitesting "k8s.io/kubernetes/pkg/api/testing"
+	"k8s.io/kubernetes/pkg/api/v1"
+
+	"k8s.io/apimachinery/pkg/util/diff"
+	"k8s.io/apimachinery/pkg/util/json"
+
+	"github.com/google/gofuzz"
+)
+
+func doRoundTrip(t *testing.T, group testapi.TestGroup, kind string) {
+	// We do fuzzing on the internal version of the object, and only then
+	// convert to the external version. This is because custom fuzzing
+	// function are only supported for internal objects.
+	internalObj, err := api.Scheme.New(group.InternalGroupVersion().WithKind(kind))
+	if err != nil {
+		t.Fatalf("Couldn't create internal object %v: %v", kind, err)
+	}
+	seed := rand.Int63()
+	apitesting.FuzzerFor(t, group.InternalGroupVersion(), rand.NewSource(seed)).
+		// We are explicitly overwriting custom fuzzing functions, to ensure
+		// that InitContainers and their statuses are not generated. This is
+		// because in thise test we are simply doing json operations, in which
+		// those disappear.
+		Funcs(
+			func(s *api.PodSpec, c fuzz.Continue) {
+				c.FuzzNoCustom(s)
+				s.InitContainers = nil
+			},
+			func(s *api.PodStatus, c fuzz.Continue) {
+				c.FuzzNoCustom(s)
+				s.InitContainerStatuses = nil
+			},
+		).Fuzz(internalObj)
+
+	item, err := api.Scheme.New(group.GroupVersion().WithKind(kind))
+	if err != nil {
+		t.Fatalf("Couldn't create external object %v: %v", kind, err)
+	}
+	if err := api.Scheme.Convert(internalObj, item, nil); err != nil {
+		t.Fatalf("Conversion for %v failed: %v", kind, err)
+	}
+
+	data, err := json.Marshal(item)
+	if err != nil {
+		t.Errorf("Error when marshaling object: %v", err)
+		return
+	}
+	unstr := make(map[string]interface{})
+	err = json.Unmarshal(data, &unstr)
+	if err != nil {
+		t.Errorf("Error when unmarshaling to unstructured: %v", err)
+		return
+	}
+
+	data, err = json.Marshal(unstr)
+	if err != nil {
+		t.Errorf("Error when marshaling unstructured: %v", err)
+		return
+	}
+	unmarshalledObj := reflect.New(reflect.TypeOf(item).Elem()).Interface()
+	err = json.Unmarshal(data, &unmarshalledObj)
+	if err != nil {
+		t.Errorf("Error when unmarshaling to object: %v", err)
+		return
+	}
+	if !api.Semantic.DeepEqual(item, unmarshalledObj) {
+		t.Errorf("Object changed during JSON operations, diff: %v", diff.ObjectReflectDiff(item, unmarshalledObj))
+		return
+	}
+
+	// TODO; Enable the following part of test once to/from unstructured
+	// format conversions are implemented.
+	/*
+		newUnstr := make(map[string]interface{})
+		err = unstructured.NewConverter().ToUnstructured(item, &newUnstr)
+		if err != nil {
+			t.Errorf("ToUnstructured failed: %v", err)
+			return
+		}
+
+		newObj := reflect.New(reflect.TypeOf(item).Elem()).Interface().(runtime.Object)
+		err = unstructured.NewConverter().FromUnstructured(newUnstr, newObj)
+		if err != nil {
+			t.Errorf("FromUnstructured failed: %v", err)
+			return
+		}
+
+		if !api.Semantic.DeepEqual(item, newObj) {
+			t.Errorf("Object changed, diff: %v", diff.ObjectReflectDiff(item, newObj))
+		}
+	*/
+}
+
+func TestRoundTrip(t *testing.T) {
+	for groupKey, group := range testapi.Groups {
+		for kind := range group.ExternalTypes() {
+			if nonRoundTrippableTypes.Has(kind) {
+				continue
+			}
+			t.Logf("Testing: %v in %v", kind, groupKey)
+			for i := 0; i < 50; i++ {
+				doRoundTrip(t, group, kind)
+				if t.Failed() {
+					break
+				}
+			}
+		}
+	}
+}
+
+// TODO; Enable the following benchmark once to/from unstructured
+// format conversions are implemented.
+/*
+func BenchmarkToFromUnstructured(b *testing.B) {
+	items := benchmarkItems()
+	size := len(items)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		unstr := map[string]interface{}{}
+		if err := unstructured.NewConverter().ToUnstructured(&items[i%size], &unstr); err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+		obj := v1.Pod{}
+		if err := unstructured.NewConverter().FromUnstructured(unstr, &obj); err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+	}
+	b.StopTimer()
+}
+*/
+
+func BenchmarkToFromUnstructuredViaJSON(b *testing.B) {
+	items := benchmarkItems()
+	size := len(items)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		data, err := json.Marshal(&items[i%size])
+		if err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+		unstr := map[string]interface{}{}
+		if err := json.Unmarshal(data, &unstr); err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+		data, err = json.Marshal(unstr)
+		if err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+		obj := v1.Pod{}
+		if err := json.Unmarshal(data, &obj); err != nil {
+			b.Fatalf("unexpected error: %v", err)
+		}
+	}
+	b.StopTimer()
+}