remove the top-level folders for versions

remove scripts

testing/actions.go

@@ -0,0 +1,487 @@
+/*
+Copyright 2015 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 testing
+
+import (
+	"path"
+	"strings"
+
+	"k8s.io/client-go/1.5/pkg/api"
+	"k8s.io/client-go/1.5/pkg/api/unversioned"
+	"k8s.io/client-go/1.5/pkg/fields"
+	"k8s.io/client-go/1.5/pkg/labels"
+	"k8s.io/client-go/1.5/pkg/runtime"
+)
+
+func NewRootGetAction(resource unversioned.GroupVersionResource, name string) GetActionImpl {
+	action := GetActionImpl{}
+	action.Verb = "get"
+	action.Resource = resource
+	action.Name = name
+
+	return action
+}
+
+func NewGetAction(resource unversioned.GroupVersionResource, namespace, name string) GetActionImpl {
+	action := GetActionImpl{}
+	action.Verb = "get"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Name = name
+
+	return action
+}
+
+func NewRootListAction(resource unversioned.GroupVersionResource, opts api.ListOptions) ListActionImpl {
+	action := ListActionImpl{}
+	action.Verb = "list"
+	action.Resource = resource
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.ListRestrictions = ListRestrictions{labelSelector, fieldSelector}
+
+	return action
+}
+
+func NewListAction(resource unversioned.GroupVersionResource, namespace string, opts api.ListOptions) ListActionImpl {
+	action := ListActionImpl{}
+	action.Verb = "list"
+	action.Resource = resource
+	action.Namespace = namespace
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.ListRestrictions = ListRestrictions{labelSelector, fieldSelector}
+
+	return action
+}
+
+func NewRootCreateAction(resource unversioned.GroupVersionResource, object runtime.Object) CreateActionImpl {
+	action := CreateActionImpl{}
+	action.Verb = "create"
+	action.Resource = resource
+	action.Object = object
+
+	return action
+}
+
+func NewCreateAction(resource unversioned.GroupVersionResource, namespace string, object runtime.Object) CreateActionImpl {
+	action := CreateActionImpl{}
+	action.Verb = "create"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Object = object
+
+	return action
+}
+
+func NewRootUpdateAction(resource unversioned.GroupVersionResource, object runtime.Object) UpdateActionImpl {
+	action := UpdateActionImpl{}
+	action.Verb = "update"
+	action.Resource = resource
+	action.Object = object
+
+	return action
+}
+
+func NewUpdateAction(resource unversioned.GroupVersionResource, namespace string, object runtime.Object) UpdateActionImpl {
+	action := UpdateActionImpl{}
+	action.Verb = "update"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Object = object
+
+	return action
+}
+
+func NewRootPatchAction(resource unversioned.GroupVersionResource, name string, patch []byte) PatchActionImpl {
+	action := PatchActionImpl{}
+	action.Verb = "patch"
+	action.Resource = resource
+	action.Name = name
+	action.Patch = patch
+
+	return action
+}
+
+func NewPatchAction(resource unversioned.GroupVersionResource, namespace string, name string, patch []byte) PatchActionImpl {
+	action := PatchActionImpl{}
+	action.Verb = "patch"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Name = name
+	action.Patch = patch
+
+	return action
+}
+
+func NewRootPatchSubresourceAction(resource unversioned.GroupVersionResource, name string, patch []byte, subresources ...string) PatchActionImpl {
+	action := PatchActionImpl{}
+	action.Verb = "patch"
+	action.Resource = resource
+	action.Subresource = path.Join(subresources...)
+	action.Name = name
+	action.Patch = patch
+
+	return action
+}
+
+func NewPatchSubresourceAction(resource unversioned.GroupVersionResource, namespace, name string, patch []byte, subresources ...string) PatchActionImpl {
+	action := PatchActionImpl{}
+	action.Verb = "patch"
+	action.Resource = resource
+	action.Subresource = path.Join(subresources...)
+	action.Namespace = namespace
+	action.Name = name
+	action.Patch = patch
+
+	return action
+}
+
+func NewRootUpdateSubresourceAction(resource unversioned.GroupVersionResource, subresource string, object runtime.Object) UpdateActionImpl {
+	action := UpdateActionImpl{}
+	action.Verb = "update"
+	action.Resource = resource
+	action.Subresource = subresource
+	action.Object = object
+
+	return action
+}
+func NewUpdateSubresourceAction(resource unversioned.GroupVersionResource, subresource string, namespace string, object runtime.Object) UpdateActionImpl {
+	action := UpdateActionImpl{}
+	action.Verb = "update"
+	action.Resource = resource
+	action.Subresource = subresource
+	action.Namespace = namespace
+	action.Object = object
+
+	return action
+}
+
+func NewRootDeleteAction(resource unversioned.GroupVersionResource, name string) DeleteActionImpl {
+	action := DeleteActionImpl{}
+	action.Verb = "delete"
+	action.Resource = resource
+	action.Name = name
+
+	return action
+}
+
+func NewDeleteAction(resource unversioned.GroupVersionResource, namespace, name string) DeleteActionImpl {
+	action := DeleteActionImpl{}
+	action.Verb = "delete"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Name = name
+
+	return action
+}
+
+func NewRootDeleteCollectionAction(resource unversioned.GroupVersionResource, opts api.ListOptions) DeleteCollectionActionImpl {
+	action := DeleteCollectionActionImpl{}
+	action.Verb = "delete-collection"
+	action.Resource = resource
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.ListRestrictions = ListRestrictions{labelSelector, fieldSelector}
+
+	return action
+}
+
+func NewDeleteCollectionAction(resource unversioned.GroupVersionResource, namespace string, opts api.ListOptions) DeleteCollectionActionImpl {
+	action := DeleteCollectionActionImpl{}
+	action.Verb = "delete-collection"
+	action.Resource = resource
+	action.Namespace = namespace
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.ListRestrictions = ListRestrictions{labelSelector, fieldSelector}
+
+	return action
+}
+
+func NewRootWatchAction(resource unversioned.GroupVersionResource, opts api.ListOptions) WatchActionImpl {
+	action := WatchActionImpl{}
+	action.Verb = "watch"
+	action.Resource = resource
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.WatchRestrictions = WatchRestrictions{labelSelector, fieldSelector, opts.ResourceVersion}
+
+	return action
+}
+
+func NewWatchAction(resource unversioned.GroupVersionResource, namespace string, opts api.ListOptions) WatchActionImpl {
+	action := WatchActionImpl{}
+	action.Verb = "watch"
+	action.Resource = resource
+	action.Namespace = namespace
+	labelSelector := opts.LabelSelector
+	if labelSelector == nil {
+		labelSelector = labels.Everything()
+	}
+	fieldSelector := opts.FieldSelector
+	if fieldSelector == nil {
+		fieldSelector = fields.Everything()
+	}
+	action.WatchRestrictions = WatchRestrictions{labelSelector, fieldSelector, opts.ResourceVersion}
+
+	return action
+}
+
+func NewProxyGetAction(resource unversioned.GroupVersionResource, namespace, scheme, name, port, path string, params map[string]string) ProxyGetActionImpl {
+	action := ProxyGetActionImpl{}
+	action.Verb = "get"
+	action.Resource = resource
+	action.Namespace = namespace
+	action.Scheme = scheme
+	action.Name = name
+	action.Port = port
+	action.Path = path
+	action.Params = params
+	return action
+}
+
+type ListRestrictions struct {
+	Labels labels.Selector
+	Fields fields.Selector
+}
+type WatchRestrictions struct {
+	Labels          labels.Selector
+	Fields          fields.Selector
+	ResourceVersion string
+}
+
+type Action interface {
+	GetNamespace() string
+	GetVerb() string
+	GetResource() unversioned.GroupVersionResource
+	GetSubresource() string
+	Matches(verb, resource string) bool
+}
+
+type GenericAction interface {
+	Action
+	GetValue() interface{}
+}
+
+type GetAction interface {
+	Action
+	GetName() string
+}
+
+type ListAction interface {
+	Action
+	GetListRestrictions() ListRestrictions
+}
+
+type CreateAction interface {
+	Action
+	GetObject() runtime.Object
+}
+
+type UpdateAction interface {
+	Action
+	GetObject() runtime.Object
+}
+
+type DeleteAction interface {
+	Action
+	GetName() string
+}
+
+type WatchAction interface {
+	Action
+	GetWatchRestrictions() WatchRestrictions
+}
+
+type ProxyGetAction interface {
+	Action
+	GetScheme() string
+	GetName() string
+	GetPort() string
+	GetPath() string
+	GetParams() map[string]string
+}
+
+type ActionImpl struct {
+	Namespace   string
+	Verb        string
+	Resource    unversioned.GroupVersionResource
+	Subresource string
+}
+
+func (a ActionImpl) GetNamespace() string {
+	return a.Namespace
+}
+func (a ActionImpl) GetVerb() string {
+	return a.Verb
+}
+func (a ActionImpl) GetResource() unversioned.GroupVersionResource {
+	return a.Resource
+}
+func (a ActionImpl) GetSubresource() string {
+	return a.Subresource
+}
+func (a ActionImpl) Matches(verb, resource string) bool {
+	return strings.ToLower(verb) == strings.ToLower(a.Verb) &&
+		strings.ToLower(resource) == strings.ToLower(a.Resource.Resource)
+}
+
+type GenericActionImpl struct {
+	ActionImpl
+	Value interface{}
+}
+
+func (a GenericActionImpl) GetValue() interface{} {
+	return a.Value
+}
+
+type GetActionImpl struct {
+	ActionImpl
+	Name string
+}
+
+func (a GetActionImpl) GetName() string {
+	return a.Name
+}
+
+type ListActionImpl struct {
+	ActionImpl
+	ListRestrictions ListRestrictions
+}
+
+func (a ListActionImpl) GetListRestrictions() ListRestrictions {
+	return a.ListRestrictions
+}
+
+type CreateActionImpl struct {
+	ActionImpl
+	Object runtime.Object
+}
+
+func (a CreateActionImpl) GetObject() runtime.Object {
+	return a.Object
+}
+
+type UpdateActionImpl struct {
+	ActionImpl
+	Object runtime.Object
+}
+
+func (a UpdateActionImpl) GetObject() runtime.Object {
+	return a.Object
+}
+
+type PatchActionImpl struct {
+	ActionImpl
+	Name  string
+	Patch []byte
+}
+
+func (a PatchActionImpl) GetName() string {
+	return a.Name
+}
+
+func (a PatchActionImpl) GetPatch() []byte {
+	return a.Patch
+}
+
+type DeleteActionImpl struct {
+	ActionImpl
+	Name string
+}
+
+func (a DeleteActionImpl) GetName() string {
+	return a.Name
+}
+
+type DeleteCollectionActionImpl struct {
+	ActionImpl
+	ListRestrictions ListRestrictions
+}
+
+func (a DeleteCollectionActionImpl) GetListRestrictions() ListRestrictions {
+	return a.ListRestrictions
+}
+
+type WatchActionImpl struct {
+	ActionImpl
+	WatchRestrictions WatchRestrictions
+}
+
+func (a WatchActionImpl) GetWatchRestrictions() WatchRestrictions {
+	return a.WatchRestrictions
+}
+
+type ProxyGetActionImpl struct {
+	ActionImpl
+	Scheme string
+	Name   string
+	Port   string
+	Path   string
+	Params map[string]string
+}
+
+func (a ProxyGetActionImpl) GetScheme() string {
+	return a.Scheme
+}
+
+func (a ProxyGetActionImpl) GetName() string {
+	return a.Name
+}
+
+func (a ProxyGetActionImpl) GetPort() string {
+	return a.Port
+}
+
+func (a ProxyGetActionImpl) GetPath() string {
+	return a.Path
+}
+
+func (a ProxyGetActionImpl) GetParams() map[string]string {
+	return a.Params
+}

testing/fake.go

@@ -0,0 +1,251 @@
+/*
+Copyright 2016 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 testing
+
+import (
+	"fmt"
+	"sync"
+
+	"k8s.io/client-go/1.5/pkg/api/unversioned"
+	"k8s.io/client-go/1.5/pkg/runtime"
+	"k8s.io/client-go/1.5/pkg/version"
+	"k8s.io/client-go/1.5/pkg/watch"
+	"k8s.io/client-go/1.5/rest"
+)
+
+// Fake implements client.Interface. Meant to be embedded into a struct to get
+// a default implementation. This makes faking out just the method you want to
+// test easier.
+type Fake struct {
+	sync.RWMutex
+	actions []Action // these may be castable to other types, but "Action" is the minimum
+
+	// ReactionChain is the list of reactors that will be attempted for every
+	// request in the order they are tried.
+	ReactionChain []Reactor
+	// WatchReactionChain is the list of watch reactors that will be attempted
+	// for every request in the order they are tried.
+	WatchReactionChain []WatchReactor
+	// ProxyReactionChain is the list of proxy reactors that will be attempted
+	// for every request in the order they are tried.
+	ProxyReactionChain []ProxyReactor
+
+	Resources map[string]*unversioned.APIResourceList
+}
+
+// Reactor is an interface to allow the composition of reaction functions.
+type Reactor interface {
+	// Handles indicates whether or not this Reactor deals with a given
+	// action.
+	Handles(action Action) bool
+	// React handles the action and returns results.  It may choose to
+	// delegate by indicated handled=false.
+	React(action Action) (handled bool, ret runtime.Object, err error)
+}
+
+// WatchReactor is an interface to allow the composition of watch functions.
+type WatchReactor interface {
+	// Handles indicates whether or not this Reactor deals with a given
+	// action.
+	Handles(action Action) bool
+	// React handles a watch action and returns results.  It may choose to
+	// delegate by indicating handled=false.
+	React(action Action) (handled bool, ret watch.Interface, err error)
+}
+
+// ProxyReactor is an interface to allow the composition of proxy get
+// functions.
+type ProxyReactor interface {
+	// Handles indicates whether or not this Reactor deals with a given
+	// action.
+	Handles(action Action) bool
+	// React handles a watch action and returns results.  It may choose to
+	// delegate by indicating handled=false.
+	React(action Action) (handled bool, ret rest.ResponseWrapper, err error)
+}
+
+// ReactionFunc is a function that returns an object or error for a given
+// Action.  If "handled" is false, then the test client will ignore the
+// results and continue to the next ReactionFunc.  A ReactionFunc can describe
+// reactions on subresources by testing the result of the action's
+// GetSubresource() method.
+type ReactionFunc func(action Action) (handled bool, ret runtime.Object, err error)
+
+// WatchReactionFunc is a function that returns a watch interface.  If
+// "handled" is false, then the test client will ignore the results and
+// continue to the next ReactionFunc.
+type WatchReactionFunc func(action Action) (handled bool, ret watch.Interface, err error)
+
+// ProxyReactionFunc is a function that returns a ResponseWrapper interface
+// for a given Action.  If "handled" is false, then the test client will
+// ignore the results and continue to the next ProxyReactionFunc.
+type ProxyReactionFunc func(action Action) (handled bool, ret rest.ResponseWrapper, err error)
+
+// AddReactor appends a reactor to the end of the chain.
+func (c *Fake) AddReactor(verb, resource string, reaction ReactionFunc) {
+	c.ReactionChain = append(c.ReactionChain, &SimpleReactor{verb, resource, reaction})
+}
+
+// PrependReactor adds a reactor to the beginning of the chain.
+func (c *Fake) PrependReactor(verb, resource string, reaction ReactionFunc) {
+	c.ReactionChain = append([]Reactor{&SimpleReactor{verb, resource, reaction}}, c.ReactionChain...)
+}
+
+// AddWatchReactor appends a reactor to the end of the chain.
+func (c *Fake) AddWatchReactor(resource string, reaction WatchReactionFunc) {
+	c.WatchReactionChain = append(c.WatchReactionChain, &SimpleWatchReactor{resource, reaction})
+}
+
+// PrependWatchReactor adds a reactor to the beginning of the chain.
+func (c *Fake) PrependWatchReactor(resource string, reaction WatchReactionFunc) {
+	c.WatchReactionChain = append([]WatchReactor{&SimpleWatchReactor{resource, reaction}}, c.WatchReactionChain...)
+}
+
+// AddProxyReactor appends a reactor to the end of the chain.
+func (c *Fake) AddProxyReactor(resource string, reaction ProxyReactionFunc) {
+	c.ProxyReactionChain = append(c.ProxyReactionChain, &SimpleProxyReactor{resource, reaction})
+}
+
+// PrependProxyReactor adds a reactor to the beginning of the chain.
+func (c *Fake) PrependProxyReactor(resource string, reaction ProxyReactionFunc) {
+	c.ProxyReactionChain = append([]ProxyReactor{&SimpleProxyReactor{resource, reaction}}, c.ProxyReactionChain...)
+}
+
+// Invokes records the provided Action and then invokes the ReactionFunc that
+// handles the action if one exists. defaultReturnObj is expected to be of the
+// same type a normal call would return.
+func (c *Fake) Invokes(action Action, defaultReturnObj runtime.Object) (runtime.Object, error) {
+	c.Lock()
+	defer c.Unlock()
+
+	c.actions = append(c.actions, action)
+	for _, reactor := range c.ReactionChain {
+		if !reactor.Handles(action) {
+			continue
+		}
+
+		handled, ret, err := reactor.React(action)
+		if !handled {
+			continue
+		}
+
+		return ret, err
+	}
+
+	return defaultReturnObj, nil
+}
+
+// InvokesWatch records the provided Action and then invokes the ReactionFunc
+// that handles the action if one exists.
+func (c *Fake) InvokesWatch(action Action) (watch.Interface, error) {
+	c.Lock()
+	defer c.Unlock()
+
+	c.actions = append(c.actions, action)
+	for _, reactor := range c.WatchReactionChain {
+		if !reactor.Handles(action) {
+			continue
+		}
+
+		handled, ret, err := reactor.React(action)
+		if !handled {
+			continue
+		}
+
+		return ret, err
+	}
+
+	return nil, fmt.Errorf("unhandled watch: %#v", action)
+}
+
+// InvokesProxy records the provided Action and then invokes the ReactionFunc
+// that handles the action if one exists.
+func (c *Fake) InvokesProxy(action Action) rest.ResponseWrapper {
+	c.Lock()
+	defer c.Unlock()
+
+	c.actions = append(c.actions, action)
+	for _, reactor := range c.ProxyReactionChain {
+		if !reactor.Handles(action) {
+			continue
+		}
+
+		handled, ret, err := reactor.React(action)
+		if !handled || err != nil {
+			continue
+		}
+
+		return ret
+	}
+
+	return nil
+}
+
+// ClearActions clears the history of actions called on the fake client.
+func (c *Fake) ClearActions() {
+	c.Lock()
+	defer c.Unlock()
+
+	c.actions = make([]Action, 0)
+}
+
+// Actions returns a chronologically ordered slice fake actions called on the
+// fake client.
+func (c *Fake) Actions() []Action {
+	c.RLock()
+	defer c.RUnlock()
+	fa := make([]Action, len(c.actions))
+	copy(fa, c.actions)
+	return fa
+}
+
+// TODO: this probably should be moved to somewhere else.
+type FakeDiscovery struct {
+	*Fake
+}
+
+func (c *FakeDiscovery) ServerResourcesForGroupVersion(groupVersion string) (*unversioned.APIResourceList, error) {
+	action := ActionImpl{
+		Verb:     "get",
+		Resource: unversioned.GroupVersionResource{Resource: "resource"},
+	}
+	c.Invokes(action, nil)
+	return c.Resources[groupVersion], nil
+}
+
+func (c *FakeDiscovery) ServerResources() (map[string]*unversioned.APIResourceList, error) {
+	action := ActionImpl{
+		Verb:     "get",
+		Resource: unversioned.GroupVersionResource{Resource: "resource"},
+	}
+	c.Invokes(action, nil)
+	return c.Resources, nil
+}
+
+func (c *FakeDiscovery) ServerGroups() (*unversioned.APIGroupList, error) {
+	return nil, nil
+}
+
+func (c *FakeDiscovery) ServerVersion() (*version.Info, error) {
+	action := ActionImpl{}
+	action.Verb = "get"
+	action.Resource = unversioned.GroupVersionResource{Resource: "version"}
+
+	c.Invokes(action, nil)
+	versionInfo := version.Get()
+	return &versionInfo, nil
+}

testing/fixture.go

@@ -0,0 +1,490 @@
+/*
+Copyright 2015 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 testing
+
+import (
+	"fmt"
+	"sync"
+
+	"k8s.io/client-go/1.5/pkg/api/errors"
+	"k8s.io/client-go/1.5/pkg/api/meta"
+	"k8s.io/client-go/1.5/pkg/api/unversioned"
+	"k8s.io/client-go/1.5/pkg/apimachinery/registered"
+	"k8s.io/client-go/1.5/pkg/runtime"
+	"k8s.io/client-go/1.5/pkg/watch"
+	"k8s.io/client-go/1.5/rest"
+)
+
+// ObjectTracker keeps track of objects. It is intended to be used to
+// fake calls to a server by returning objects based on their kind,
+// namespace and name.
+type ObjectTracker interface {
+	// Add adds an object to the tracker. If object being added
+	// is a list, its items are added separately.
+	Add(obj runtime.Object) error
+
+	// Get retrieves the object by its kind, namespace and name.
+	Get(gvk unversioned.GroupVersionKind, ns, name string) (runtime.Object, error)
+
+	// Update updates an existing object in the tracker.
+	Update(obj runtime.Object) error
+
+	// List retrieves all objects of a given kind in the given
+	// namespace. Only non-List kinds are accepted.
+	List(gvk unversioned.GroupVersionKind, ns string) (runtime.Object, error)
+
+	// Delete deletes an existing object from the tracker. If object
+	// didn't exist in the tracker prior to deletion, Delete returns
+	// no error.
+	Delete(gvk unversioned.GroupVersionKind, ns, name string) error
+}
+
+// ObjectScheme abstracts the implementation of common operations on objects.
+type ObjectScheme interface {
+	runtime.ObjectCreater
+	runtime.ObjectCopier
+	runtime.ObjectTyper
+}
+
+// ObjectReaction returns a ReactionFunc that applies core.Action to
+// the given tracker.
+func ObjectReaction(tracker ObjectTracker, mapper meta.RESTMapper) ReactionFunc {
+	return func(action Action) (bool, runtime.Object, error) {
+		ns := action.GetNamespace()
+		gvr := action.GetResource()
+
+		gvk, err := mapper.KindFor(gvr)
+		if err != nil {
+			return false, nil, fmt.Errorf("error getting kind for resource %q: %s", gvr, err)
+		}
+
+		// This is a temporary fix. Because there is no internal resource, so
+		// the caller has no way to express that it expects to get an internal
+		// kind back. A more proper fix will be directly specify the Kind when
+		// build the action.
+		gvk.Version = gvr.Version
+		if len(gvk.Version) == 0 {
+			gvk.Version = runtime.APIVersionInternal
+		}
+
+		// Here and below we need to switch on implementation types,
+		// not on interfaces, as some interfaces are identical
+		// (e.g. UpdateAction and CreateAction), so if we use them,
+		// updates and creates end up matching the same case branch.
+		switch action := action.(type) {
+
+		case ListActionImpl:
+			obj, err := tracker.List(gvk, ns)
+			return true, obj, err
+
+		case GetActionImpl:
+			obj, err := tracker.Get(gvk, ns, action.GetName())
+			return true, obj, err
+
+		case CreateActionImpl:
+			objMeta, err := meta.Accessor(action.GetObject())
+			if err != nil {
+				return true, nil, err
+			}
+			if action.GetSubresource() == "" {
+				err = tracker.Add(action.GetObject())
+			} else {
+				// TODO: Currently we're handling subresource creation as an update
+				// on the enclosing resource. This works for some subresources but
+				// might not be generic enough.
+				err = tracker.Update(action.GetObject())
+			}
+			if err != nil {
+				return true, nil, err
+			}
+			obj, err := tracker.Get(gvk, ns, objMeta.GetName())
+			return true, obj, err
+
+		case UpdateActionImpl:
+			objMeta, err := meta.Accessor(action.GetObject())
+			if err != nil {
+				return true, nil, err
+			}
+			err = tracker.Update(action.GetObject())
+			if err != nil {
+				return true, nil, err
+			}
+			obj, err := tracker.Get(gvk, ns, objMeta.GetName())
+			return true, obj, err
+
+		case DeleteActionImpl:
+			err := tracker.Delete(gvk, ns, action.GetName())
+			if err != nil {
+				return true, nil, err
+			}
+			return true, nil, nil
+
+		default:
+			return false, nil, fmt.Errorf("no reaction implemented for %s", action)
+		}
+	}
+}
+
+type tracker struct {
+	scheme  ObjectScheme
+	decoder runtime.Decoder
+	lock    sync.RWMutex
+	objects map[unversioned.GroupVersionKind][]runtime.Object
+}
+
+var _ ObjectTracker = &tracker{}
+
+// NewObjectTracker returns an ObjectTracker that can be used to keep track
+// of objects for the fake clientset. Mostly useful for unit tests.
+func NewObjectTracker(scheme ObjectScheme, decoder runtime.Decoder) ObjectTracker {
+	return &tracker{
+		scheme:  scheme,
+		decoder: decoder,
+		objects: make(map[unversioned.GroupVersionKind][]runtime.Object),
+	}
+}
+
+func (t *tracker) List(gvk unversioned.GroupVersionKind, ns string) (runtime.Object, error) {
+	// Heuristic for list kind: original kind + List suffix. Might
+	// not always be true but this tracker has a pretty limited
+	// understanding of the actual API model.
+	listGVK := gvk
+	listGVK.Kind = listGVK.Kind + "List"
+
+	list, err := t.scheme.New(listGVK)
+	if err != nil {
+		return nil, err
+	}
+
+	if !meta.IsListType(list) {
+		return nil, fmt.Errorf("%q is not a list type", listGVK.Kind)
+	}
+
+	t.lock.RLock()
+	defer t.lock.RUnlock()
+
+	objs, ok := t.objects[gvk]
+	if !ok {
+		return list, nil
+	}
+
+	matchingObjs, err := filterByNamespaceAndName(objs, ns, "")
+	if err != nil {
+		return nil, err
+	}
+	if err := meta.SetList(list, matchingObjs); err != nil {
+		return nil, err
+	}
+	if list, err = t.scheme.Copy(list); err != nil {
+		return nil, err
+	}
+	return list, nil
+}
+
+func (t *tracker) Get(gvk unversioned.GroupVersionKind, ns, name string) (runtime.Object, error) {
+	if err := checkNamespace(gvk, ns); err != nil {
+		return nil, err
+	}
+
+	errNotFound := errors.NewNotFound(unversioned.GroupResource{Group: gvk.Group, Resource: gvk.Kind}, name)
+
+	t.lock.RLock()
+	defer t.lock.RUnlock()
+
+	objs, ok := t.objects[gvk]
+	if !ok {
+		return nil, errNotFound
+	}
+
+	matchingObjs, err := filterByNamespaceAndName(objs, ns, name)
+	if err != nil {
+		return nil, err
+	}
+	if len(matchingObjs) == 0 {
+		return nil, errNotFound
+	}
+	if len(matchingObjs) > 1 {
+		return nil, fmt.Errorf("more than one object matched gvk %s, ns: %q name: %q", gvk, ns, name)
+	}
+
+	// Only one object should match in the tracker if it works
+	// correctly, as Add/Update methods enforce kind/namespace/name
+	// uniqueness.
+	obj, err := t.scheme.Copy(matchingObjs[0])
+	if err != nil {
+		return nil, err
+	}
+
+	if status, ok := obj.(*unversioned.Status); ok {
+		if status.Details != nil {
+			status.Details.Kind = gvk.Kind
+		}
+		if status.Status != unversioned.StatusSuccess {
+			return nil, &errors.StatusError{ErrStatus: *status}
+		}
+	}
+
+	return obj, nil
+}
+
+func (t *tracker) Add(obj runtime.Object) error {
+	return t.add(obj, false)
+}
+
+func (t *tracker) Update(obj runtime.Object) error {
+	return t.add(obj, true)
+}
+
+func (t *tracker) add(obj runtime.Object, replaceExisting bool) error {
+	if meta.IsListType(obj) {
+		return t.addList(obj, replaceExisting)
+	}
+
+	gvks, _, err := t.scheme.ObjectKinds(obj)
+	if err != nil {
+		return err
+	}
+	if len(gvks) == 0 {
+		return fmt.Errorf("no registered kinds for %v", obj)
+	}
+
+	t.lock.Lock()
+	defer t.lock.Unlock()
+
+	for _, gvk := range gvks {
+		gr := unversioned.GroupResource{Group: gvk.Group, Resource: gvk.Kind}
+
+		// To avoid the object from being accidentally modified by caller
+		// after it's been added to the tracker, we always store the deep
+		// copy.
+		obj, err = t.scheme.Copy(obj)
+		if err != nil {
+			return err
+		}
+
+		if status, ok := obj.(*unversioned.Status); ok && status.Details != nil {
+			gvk.Kind = status.Details.Kind
+		}
+
+		newMeta, err := meta.Accessor(obj)
+		if err != nil {
+			return err
+		}
+
+		if err := checkNamespace(gvk, newMeta.GetNamespace()); err != nil {
+			return err
+		}
+
+		for i, existingObj := range t.objects[gvk] {
+			oldMeta, err := meta.Accessor(existingObj)
+			if err != nil {
+				return err
+			}
+			if oldMeta.GetNamespace() == newMeta.GetNamespace() && oldMeta.GetName() == newMeta.GetName() {
+				if replaceExisting {
+					t.objects[gvk][i] = obj
+					return nil
+				}
+				return errors.NewAlreadyExists(gr, newMeta.GetName())
+			}
+		}
+
+		if replaceExisting {
+			// Tried to update but no matching object was found.
+			return errors.NewNotFound(gr, newMeta.GetName())
+		}
+
+		t.objects[gvk] = append(t.objects[gvk], obj)
+	}
+
+	return nil
+}
+
+func (t *tracker) addList(obj runtime.Object, replaceExisting bool) error {
+	list, err := meta.ExtractList(obj)
+	if err != nil {
+		return err
+	}
+	errs := runtime.DecodeList(list, t.decoder)
+	if len(errs) > 0 {
+		return errs[0]
+	}
+	for _, obj := range list {
+		err := t.add(obj, replaceExisting)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *tracker) Delete(gvk unversioned.GroupVersionKind, ns, name string) error {
+	if err := checkNamespace(gvk, ns); err != nil {
+		return err
+	}
+
+	t.lock.Lock()
+	defer t.lock.Unlock()
+
+	found := false
+
+	for i, existingObj := range t.objects[gvk] {
+		objMeta, err := meta.Accessor(existingObj)
+		if err != nil {
+			return err
+		}
+		if objMeta.GetNamespace() == ns && objMeta.GetName() == name {
+			t.objects[gvk] = append(t.objects[gvk][:i], t.objects[gvk][i+1:]...)
+			found = true
+			break
+		}
+	}
+
+	if found {
+		return nil
+	}
+
+	return errors.NewNotFound(unversioned.GroupResource{Group: gvk.Group, Resource: gvk.Kind}, name)
+}
+
+// filterByNamespaceAndName returns all objects in the collection that
+// match provided namespace and name. Empty namespace matches
+// non-namespaced objects.
+func filterByNamespaceAndName(objs []runtime.Object, ns, name string) ([]runtime.Object, error) {
+	var res []runtime.Object
+
+	for _, obj := range objs {
+		acc, err := meta.Accessor(obj)
+		if err != nil {
+			return nil, err
+		}
+		if ns != "" && acc.GetNamespace() != ns {
+			continue
+		}
+		if name != "" && acc.GetName() != name {
+			continue
+		}
+		res = append(res, obj)
+	}
+
+	return res, nil
+}
+
+// checkNamespace makes sure that the scope of gvk matches ns. It
+// returns an error if namespace is empty but gvk is a namespaced
+// kind, or if ns is non-empty and gvk is a namespaced kind.
+func checkNamespace(gvk unversioned.GroupVersionKind, ns string) error {
+	group, err := registered.Group(gvk.Group)
+	if err != nil {
+		return err
+	}
+	mapping, err := group.RESTMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
+	if err != nil {
+		return err
+	}
+	switch mapping.Scope.Name() {
+	case meta.RESTScopeNameRoot:
+		if ns != "" {
+			return fmt.Errorf("namespace specified for a non-namespaced kind %s", gvk)
+		}
+	case meta.RESTScopeNameNamespace:
+		if ns == "" {
+			// Skipping this check for Events, since
+			// controllers emit events that have no namespace,
+			// even though Event is a namespaced resource.
+			if gvk.Kind != "Event" {
+				return fmt.Errorf("no namespace specified for a namespaced kind %s", gvk)
+			}
+		}
+	}
+
+	return nil
+}
+
+func DefaultWatchReactor(watchInterface watch.Interface, err error) WatchReactionFunc {
+	return func(action Action) (bool, watch.Interface, error) {
+		return true, watchInterface, err
+	}
+}
+
+// SimpleReactor is a Reactor.  Each reaction function is attached to a given verb,resource tuple.  "*" in either field matches everything for that value.
+// For instance, *,pods matches all verbs on pods.  This allows for easier composition of reaction functions
+type SimpleReactor struct {
+	Verb     string
+	Resource string
+
+	Reaction ReactionFunc
+}
+
+func (r *SimpleReactor) Handles(action Action) bool {
+	verbCovers := r.Verb == "*" || r.Verb == action.GetVerb()
+	if !verbCovers {
+		return false
+	}
+	resourceCovers := r.Resource == "*" || r.Resource == action.GetResource().Resource
+	if !resourceCovers {
+		return false
+	}
+
+	return true
+}
+
+func (r *SimpleReactor) React(action Action) (bool, runtime.Object, error) {
+	return r.Reaction(action)
+}
+
+// SimpleWatchReactor is a WatchReactor.  Each reaction function is attached to a given resource.  "*" matches everything for that value.
+// For instance, *,pods matches all verbs on pods.  This allows for easier composition of reaction functions
+type SimpleWatchReactor struct {
+	Resource string
+
+	Reaction WatchReactionFunc
+}
+
+func (r *SimpleWatchReactor) Handles(action Action) bool {
+	resourceCovers := r.Resource == "*" || r.Resource == action.GetResource().Resource
+	if !resourceCovers {
+		return false
+	}
+
+	return true
+}
+
+func (r *SimpleWatchReactor) React(action Action) (bool, watch.Interface, error) {
+	return r.Reaction(action)
+}
+
+// SimpleProxyReactor is a ProxyReactor.  Each reaction function is attached to a given resource.  "*" matches everything for that value.
+// For instance, *,pods matches all verbs on pods.  This allows for easier composition of reaction functions.
+type SimpleProxyReactor struct {
+	Resource string
+
+	Reaction ProxyReactionFunc
+}
+
+func (r *SimpleProxyReactor) Handles(action Action) bool {
+	resourceCovers := r.Resource == "*" || r.Resource == action.GetResource().Resource
+	if !resourceCovers {
+		return false
+	}
+
+	return true
+}
+
+func (r *SimpleProxyReactor) React(action Action) (bool, rest.ResponseWrapper, error) {
+	return r.Reaction(action)
+}