add a unit test

pkg/kubectl/cmd/BUILD

@@ -191,6 +191,7 @@ go_test(
         "//pkg/runtime/serializer/streaming:go_default_library",
         "//pkg/types:go_default_library",
         "//pkg/util/intstr:go_default_library",
+        "//pkg/util/strategicpatch:go_default_library",
         "//pkg/util/strings:go_default_library",
         "//pkg/util/term:go_default_library",
         "//pkg/util/wait:go_default_library",

pkg/kubectl/cmd/apply_test.go

@@ -23,6 +23,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"os"
+	"strings"
 	"testing"
 
 	"github.com/spf13/cobra"
@@ -37,6 +38,7 @@ import (
 	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/util/strategicpatch"
 )
 
 func TestApplyExtraArgsFail(t *testing.T) {
@@ -142,6 +144,58 @@ func readAndAnnotateService(t *testing.T, filename string) (string, []byte) {
 	return annotateRuntimeObject(t, svc1, svc2, "Service")
 }
 
+func setFinalizersRuntimeObject(t *testing.T, originalObj, currentObj runtime.Object) (string, []byte) {
+	originalAccessor, err := meta.Accessor(originalObj)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	originalFinalizers := []string{"a/a"}
+	originalAccessor.SetFinalizers(originalFinalizers)
+	original, err := runtime.Encode(testapi.Default.Codec(), originalObj)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	currentAccessor, err := meta.Accessor(currentObj)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	currentFinalizers := []string{"b/b"}
+	currentAccessor.SetFinalizers(currentFinalizers)
+
+	currentAnnotations := currentAccessor.GetAnnotations()
+	if currentAnnotations == nil {
+		currentAnnotations = make(map[string]string)
+	}
+	currentAnnotations[annotations.LastAppliedConfigAnnotation] = string(original)
+	currentAccessor.SetAnnotations(currentAnnotations)
+	current, err := runtime.Encode(testapi.Default.Codec(), currentObj)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return currentAccessor.GetName(), current
+}
+
+func readAndSetFinalizersReplicationController(t *testing.T, filename string) (string, []byte) {
+	rc1 := readReplicationControllerFromFile(t, filename)
+	rc2 := readReplicationControllerFromFile(t, filename)
+	name, rcBytes := setFinalizersRuntimeObject(t, rc1, rc2)
+	return name, rcBytes
+}
+
+func isSMPatchVersion_1_5(t *testing.T, req *http.Request) bool {
+	patch, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// SMPatchVersion_1_5 patch should has string "mergeprimitiveslist"
+	return strings.Contains(string(patch), strategicpatch.MergePrimitivesListDirective)
+}
+
 func validatePatchApplication(t *testing.T, req *http.Request) {
 	patch, err := ioutil.ReadAll(req.Body)
 	if err != nil {
@@ -223,6 +277,65 @@ func TestApplyObject(t *testing.T) {
 	}
 }
 
+func TestApplyRetryWithSMPatchVersion_1_5(t *testing.T) {
+	initTestErrorHandler(t)
+	nameRC, currentRC := readAndSetFinalizersReplicationController(t, filenameRC)
+	pathRC := "/namespaces/test/replicationcontrollers/" + nameRC
+
+	firstPatch := true
+	retry := false
+	f, tf, _, ns := cmdtesting.NewAPIFactory()
+	tf.Printer = &testPrinter{}
+	tf.Client = &fake.RESTClient{
+		NegotiatedSerializer: ns,
+		Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
+			switch p, m := req.URL.Path, req.Method; {
+			case p == pathRC && m == "GET":
+				bodyRC := ioutil.NopCloser(bytes.NewReader(currentRC))
+				return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: bodyRC}, nil
+			case p == pathRC && m == "PATCH":
+				if firstPatch {
+					if !isSMPatchVersion_1_5(t, req) {
+						t.Fatalf("apply didn't try to send SMPatchVersion_1_5 for the first time")
+					}
+					firstPatch = false
+					statusErr := kubeerr.NewInternalError(fmt.Errorf("Server encountered internal error."))
+					bodyBytes, _ := json.Marshal(statusErr)
+					bodyErr := ioutil.NopCloser(bytes.NewReader(bodyBytes))
+					return &http.Response{StatusCode: http.StatusInternalServerError, Header: defaultHeader(), Body: bodyErr}, nil
+				}
+				retry = true
+				if isSMPatchVersion_1_5(t, req) {
+					t.Fatalf("apply didn't try to send SMPatchVersion_1_0 after SMPatchVersion_1_5 patch encounter an Internal Error (500)")
+				}
+				bodyRC := ioutil.NopCloser(bytes.NewReader(currentRC))
+				return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: bodyRC}, nil
+			default:
+				t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
+				return nil, nil
+			}
+		}),
+	}
+	tf.Namespace = "test"
+	tf.ClientConfig = defaultClientConfig()
+	buf := bytes.NewBuffer([]byte{})
+
+	cmd := NewCmdApply(f, buf)
+	cmd.Flags().Set("filename", filenameRC)
+	cmd.Flags().Set("output", "name")
+	cmd.Run(cmd, []string{})
+
+	if !retry {
+		t.Fatalf("apply didn't retry when get Internal Error (500)")
+	}
+
+	// uses the name from the file, not the response
+	expectRC := "replicationcontroller/" + nameRC + "\n"
+	if buf.String() != expectRC {
+		t.Fatalf("unexpected output: %s\nexpected: %s", buf.String(), expectRC)
+	}
+}
+
 func TestApplyRetry(t *testing.T) {
 	initTestErrorHandler(t)
 	nameRC, currentRC := readAndAnnotateReplicationController(t, filenameRC)

pkg/kubectl/cmd/testing/fake.go

@@ -427,8 +427,12 @@ func (f *fakeAPIFactory) UnstructuredObject() (meta.RESTMapper, runtime.ObjectTy
 	return cmdutil.NewShortcutExpander(mapper, nil), typer, nil
 }
 
-func (f *fakeAPIFactory) Decoder(bool) runtime.Decoder {
-	return testapi.Default.Codec()
+func (f *fakeAPIFactory) Decoder(toInternal bool) runtime.Decoder {
+	if toInternal {
+		return api.Codecs.UniversalDecoder()
+	} else {
+		return api.Codecs.UniversalDeserializer()
+	}
 }
 
 func (f *fakeAPIFactory) JSONEncoder() runtime.Encoder {

pkg/util/strategicpatch/patch.go

@@ -45,7 +45,7 @@ const (
 	deleteDirective              = "delete"
 	replaceDirective             = "replace"
 	mergeDirective               = "merge"
-	mergePrimitivesListDirective = "mergeprimitiveslist"
+	MergePrimitivesListDirective = "mergeprimitiveslist"
 
 	// different versions of StrategicMergePatch
 	SMPatchVersion_1_0   StrategicMergePatchVersion = "v1.0.0"
@@ -393,7 +393,7 @@ loopB:
 func diffListsOfScalarsIntoMap(originalScalars, modifiedScalars []interface{}, ignoreChangesAndAdditions, ignoreDeletions bool) (map[string]interface{}, error) {
 	originalIndex, modifiedIndex := 0, 0
 	patch := map[string]interface{}{}
-	patch[directiveMarker] = mergePrimitivesListDirective
+	patch[directiveMarker] = MergePrimitivesListDirective
 
 	for originalIndex < len(originalScalars) && modifiedIndex < len(modifiedScalars) {
 		originalString := fmt.Sprintf("%v", originalScalars[originalIndex])
@@ -627,7 +627,7 @@ func mergeMap(original, patch map[string]interface{}, t reflect.Type) (map[strin
 			return map[string]interface{}{}, nil
 		}
 
-		if v == mergePrimitivesListDirective {
+		if v == MergePrimitivesListDirective {
 			// delete the directiveMarker's key-value pair to avoid delta map and delete map
 			// overlaping with each other when calculating a ThreeWayDiff for list of Primitives.
 			// Otherwise, the overlaping will cause it calling LookupPatchMetadata() which will
@@ -718,7 +718,7 @@ func mergeMap(original, patch map[string]interface{}, t reflect.Type) (map[strin
 // the patch because getting a deep copy of a slice in golang is highly
 // non-trivial.
 // The patch could be a map[string]interface{} representing a slice of primitives.
-// If the patch map doesn't has the specific directiveMarker (mergePrimitivesListDirective),
+// If the patch map doesn't has the specific directiveMarker (MergePrimitivesListDirective),
 // it returns an error. Please check patch_test.go and find the test case named
 // "merge lists of scalars for list of primitives" to see what the patch looks like.
 // Patch is still []interface{} for all the other types.
@@ -731,7 +731,7 @@ func mergeSlice(original []interface{}, patch interface{}, elemType reflect.Type
 	if patchMap, ok := patch.(map[string]interface{}); ok {
 		// We try to merge the original slice with a patch map only when the map has
 		// a specific directiveMarker. Otherwise, this patch will be treated as invalid.
-		if directiveValue, ok := patchMap[directiveMarker]; ok && directiveValue == mergePrimitivesListDirective {
+		if directiveValue, ok := patchMap[directiveMarker]; ok && directiveValue == MergePrimitivesListDirective {
 			return mergeSliceOfScalarsWithPatchMap(original, patchMap)
 		} else {
 			return nil, fmt.Errorf("Unable to merge a slice with an invalid map")
@@ -838,10 +838,10 @@ func mergeSlice(original []interface{}, patch interface{}, elemType reflect.Type
 
 // mergeSliceOfScalarsWithPatchMap merges the original slice with a patch map and
 // returns an uniqified and sorted slice of primitives.
-// The patch map must have the specific directiveMarker (mergePrimitivesListDirective).
+// The patch map must have the specific directiveMarker (MergePrimitivesListDirective).
 func mergeSliceOfScalarsWithPatchMap(original []interface{}, patch map[string]interface{}) ([]interface{}, error) {
 	// make sure the patch has the specific directiveMarker ()
-	if directiveValue, ok := patch[directiveMarker]; ok && directiveValue != mergePrimitivesListDirective {
+	if directiveValue, ok := patch[directiveMarker]; ok && directiveValue != MergePrimitivesListDirective {
 		return nil, fmt.Errorf("Unable to merge a slice with an invalid map")
 	}
 	delete(patch, directiveMarker)
@@ -1181,7 +1181,7 @@ func mergingMapFieldsHaveConflicts(
 					return true, nil
 				}
 
-				if leftMarker == mergePrimitivesListDirective && rightMarker == mergePrimitivesListDirective {
+				if leftMarker == MergePrimitivesListDirective && rightMarker == MergePrimitivesListDirective {
 					return false, nil
 				}
 			}
@@ -1209,7 +1209,7 @@ func mapsHaveConflicts(typedLeft, typedRight map[string]interface{}, structType
 	isForListOfPrimitives := false
 	if leftDirective, ok := typedLeft[directiveMarker]; ok {
 		if rightDirective, ok := typedRight[directiveMarker]; ok {
-			if leftDirective == mergePrimitivesListDirective && rightDirective == rightDirective {
+			if leftDirective == MergePrimitivesListDirective && rightDirective == rightDirective {
 				isForListOfPrimitives = true
 			}
 		}

test/fixtures/pkg/kubectl/cmd/apply/rc.yaml

 apiVersion: v1
 kind: ReplicationController
 metadata:
+  finalizers:
+  - b/b
   name: test-rc
   labels:
     name: test-rc