Golang api.NewContext函数代码示例

// TestValidNamespace validates that namespace rules are enforced on a resource prior to create or update
func TestValidNamespace(t *testing.T) {
	ctx := api.NewDefaultContext()
	namespace, _ := api.NamespaceFrom(ctx)
	resource := api.ReplicationController{}
	if !api.ValidNamespace(ctx, &resource.ObjectMeta) {
		t.Errorf("expected success")
	}
	if namespace != resource.Namespace {
		t.Errorf("expected resource to have the default namespace assigned during validation")
	}
	resource = api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: "other"}}
	if api.ValidNamespace(ctx, &resource.ObjectMeta) {
		t.Errorf("Expected error that resource and context errors do not match because resource has different namespace")
	}
	ctx = api.NewContext()
	if api.ValidNamespace(ctx, &resource.ObjectMeta) {
		t.Errorf("Expected error that resource and context errors do not match since context has no namespace")
	}

	ctx = api.NewContext()
	ns := api.NamespaceValue(ctx)
	if ns != "" {
		t.Errorf("Expected the empty string")
	}
}

func TestEtcdDelete(t *testing.T) {
	podA := &api.Pod{
		ObjectMeta: api.ObjectMeta{Name: "foo", ResourceVersion: "1"},
		Spec:       api.PodSpec{NodeName: "machine"},
	}

	nodeWithPodA := tools.EtcdResponseWithError{
		R: &etcd.Response{
			Node: &etcd.Node{
				Value:         runtime.EncodeOrDie(testapi.Default.Codec(), podA),
				ModifiedIndex: 1,
				CreatedIndex:  1,
			},
		},
		E: nil,
	}

	emptyNode := tools.EtcdResponseWithError{
		R: &etcd.Response{},
		E: tools.EtcdErrorNotFound,
	}

	testContext := api.WithNamespace(api.NewContext(), "test")

	key := "foo"

	table := map[string]struct {
		existing tools.EtcdResponseWithError
		expect   tools.EtcdResponseWithError
		errOK    func(error) bool
	}{
		"normal": {
			existing: nodeWithPodA,
			expect:   emptyNode,
			errOK:    func(err error) bool { return err == nil },
		},
		"notExisting": {
			existing: emptyNode,
			expect:   emptyNode,
			errOK:    func(err error) bool { return errors.IsNotFound(err) },
		},
	}

	for name, item := range table {
		fakeClient, registry := NewTestGenericEtcdRegistry(t)
		path := etcdtest.AddPrefix("pods/foo")
		fakeClient.Data[path] = item.existing
		obj, err := registry.Delete(testContext, key, nil)
		if !item.errOK(err) {
			t.Errorf("%v: unexpected error: %v (%#v)", name, err, obj)
		}

		if item.expect.E != nil {
			item.expect.E.(*etcd.EtcdError).Index = fakeClient.ChangeIndex
		}
		if e, a := item.expect, fakeClient.Data[path]; !api.Semantic.DeepDerivative(e, a) {
			t.Errorf("%v:\n%s", name, util.ObjectDiff(e, a))
		}
	}
}

func TestScaleUpdate(t *testing.T) {
	storage, fakeClient := newStorage(t)

	ctx := api.WithNamespace(api.NewContext(), namespace)
	key := etcdtest.AddPrefix("/deployments/" + namespace + "/" + name)
	if _, err := fakeClient.Set(key, runtime.EncodeOrDie(testapi.Extensions.Codec(), &validDeployment), 0); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	replicas := 12
	update := extensions.Scale{
		ObjectMeta: api.ObjectMeta{Name: name, Namespace: namespace},
		Spec: extensions.ScaleSpec{
			Replicas: replicas,
		},
	}

	if _, _, err := storage.Scale.Update(ctx, &update); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	response, err := fakeClient.Get(key, false, false)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	var deployment extensions.Deployment
	testapi.Extensions.Codec().DecodeInto([]byte(response.Node.Value), &deployment)
	if deployment.Spec.Replicas != replicas {
		t.Errorf("wrong replicas count expected: %d got: %d", replicas, deployment.Spec.Replicas)
	}
}

// Bind just does a POST binding RPC.
func (b *binder) Bind(binding *api.Binding) error {
	glog.V(2).Infof("Attempting to bind %v to %v", binding.Name, binding.Target.Name)
	ctx := api.WithNamespace(api.NewContext(), binding.Namespace)
	return b.Post().Namespace(api.NamespaceValue(ctx)).Resource("bindings").Body(binding).Do().Error()
	// TODO: use Pods interface for binding once clusters are upgraded
	// return b.Pods(binding.Namespace).Bind(binding)
}

func TestUpdate(t *testing.T) {
	storage, fakeClient := newStorage(t)

	ctx := api.WithNamespace(api.NewContext(), "test")
	key := etcdtest.AddPrefix("/controllers/test/foo")
	if _, err := fakeClient.Set(key, runtime.EncodeOrDie(testapi.Default.Codec(), &validController), 0); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	replicas := 12
	update := extensions.Scale{
		ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "test"},
		Spec: extensions.ScaleSpec{
			Replicas: replicas,
		},
	}

	if _, _, err := storage.Update(ctx, &update); err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	response, err := fakeClient.Get(key, false, false)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	var controller api.ReplicationController
	testapi.Extensions.Codec().DecodeInto([]byte(response.Node.Value), &controller)
	if controller.Spec.Replicas != replicas {
		t.Errorf("wrong replicas count expected: %d got: %d", replicas, controller.Spec.Replicas)
	}
}

// testGetDifferentNamespace ensures same-name objects in different namespaces do not clash
func (t *Tester) testGetDifferentNamespace(obj runtime.Object) {
	if t.clusterScope {
		t.Fatalf("the test does not work in in cluster-scope")
	}

	objMeta := t.getObjectMetaOrFail(obj)
	objMeta.Name = "foo5"

	ctx1 := api.WithNamespace(api.NewContext(), "bar3")
	objMeta.Namespace = api.NamespaceValue(ctx1)
	_, err := t.storage.(rest.Creater).Create(ctx1, obj)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	ctx2 := api.WithNamespace(api.NewContext(), "bar4")
	objMeta.Namespace = api.NamespaceValue(ctx2)
	_, err = t.storage.(rest.Creater).Create(ctx2, obj)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	got1, err := t.storage.(rest.Getter).Get(ctx1, objMeta.Name)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	got1Meta := t.getObjectMetaOrFail(got1)
	if got1Meta.Name != objMeta.Name {
		t.Errorf("unexpected name of object: %#v, expected: %s", got1, objMeta.Name)
	}
	if got1Meta.Namespace != api.NamespaceValue(ctx1) {
		t.Errorf("unexpected namespace of object: %#v, expected: %s", got1, api.NamespaceValue(ctx1))
	}

	got2, err := t.storage.(rest.Getter).Get(ctx2, objMeta.Name)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	got2Meta := t.getObjectMetaOrFail(got2)
	if got2Meta.Name != objMeta.Name {
		t.Errorf("unexpected name of object: %#v, expected: %s", got2, objMeta.Name)
	}
	if got2Meta.Namespace != api.NamespaceValue(ctx2) {
		t.Errorf("unexpected namespace of object: %#v, expected: %s", got2, api.NamespaceValue(ctx2))
	}
}

// createController is a helper function that returns a controller with the updated resource version.
func createController(storage *REST, rc api.ReplicationController, t *testing.T) (api.ReplicationController, error) {
	ctx := api.WithNamespace(api.NewContext(), rc.Namespace)
	obj, err := storage.Create(ctx, &rc)
	if err != nil {
		t.Errorf("Failed to create controller, %v", err)
	}
	newRc := obj.(*api.ReplicationController)
	return *newRc, nil
}

func TestGet_BadName(t *testing.T) {
	r := NewTestREST(testResponse{code: 200, data: "ok"})
	_, err := r.Get(api.NewContext(), "invalidname")
	if err == nil {
		t.Fatalf("Expected error, but did not get one")
	}
	if !strings.Contains(err.Error(), "Component not found: invalidname") {
		t.Fatalf("Got unexpected error: %v", err)
	}
}

func TestEtcdCreateFailsWithoutNamespace(t *testing.T) {
	storage, _, _, fakeClient := newStorage(t)
	fakeClient.TestIndex = true
	pod := validNewPod()
	pod.Namespace = ""
	_, err := storage.Create(api.NewContext(), pod)
	// Accept "namespace" or "Namespace".
	if err == nil || !strings.Contains(err.Error(), "amespace") {
		t.Fatalf("expected error that namespace was missing from context, got: %v", err)
	}
}

func TestGet_NoError(t *testing.T) {
	r := NewTestREST(testResponse{code: 200, data: "ok"})
	got, err := r.Get(api.NewContext(), "test1")
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	expect := createTestStatus("test1", api.ConditionTrue, "ok", "nil")
	if e, a := expect, got; !reflect.DeepEqual(e, a) {
		t.Errorf("Got unexpected object. Diff: %s", util.ObjectDiff(e, a))
	}
}

func (t *Tester) testGetMimatchedNamespace(obj runtime.Object) {
	ctx1 := api.WithNamespace(api.NewContext(), "bar1")
	ctx2 := api.WithNamespace(api.NewContext(), "bar2")
	objMeta := t.getObjectMetaOrFail(obj)
	objMeta.Name = "foo4"
	objMeta.Namespace = api.NamespaceValue(ctx1)
	_, err := t.storage.(rest.Creater).Create(ctx1, obj)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	_, err = t.storage.(rest.Getter).Get(ctx2, "foo4")
	if t.clusterScope {
		if err != nil {
			t.Errorf("unexpected error: %v", err)
		}
	} else {
		if !errors.IsNotFound(err) {
			t.Errorf("unexpected error returned: %#v", err)
		}
	}
}

func TestList_NoError(t *testing.T) {
	r := NewTestREST(testResponse{code: 200, data: "ok"})
	got, err := r.List(api.NewContext(), labels.Everything(), fields.Everything())
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	expect := &api.ComponentStatusList{
		Items: []api.ComponentStatus{*(createTestStatus("test1", api.ConditionTrue, "ok", "nil"))},
	}
	if e, a := expect, got; !reflect.DeepEqual(e, a) {
		t.Errorf("Got unexpected object. Diff: %s", util.ObjectDiff(e, a))
	}
}

func (t *Tester) testCreateIgnoresContextNamespace(valid runtime.Object) {
	// Ignore non-empty namespace in context
	ctx := api.WithNamespace(api.NewContext(), "not-default2")

	// Ideally, we'd get an error back here, but at least verify the namespace wasn't persisted
	created, err := t.storage.(rest.Creater).Create(ctx, copyOrDie(valid))
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	createdObjectMeta := t.getObjectMetaOrFail(created)
	if createdObjectMeta.Namespace != api.NamespaceNone {
		t.Errorf("Expected empty namespace on created object, got '%v'", createdObjectMeta.Namespace)
	}
}

func TestList_UnknownError(t *testing.T) {
	r := NewTestREST(testResponse{code: 500, data: "", err: fmt.Errorf("fizzbuzz error")})
	got, err := r.List(api.NewContext(), labels.Everything(), fields.Everything())
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	expect := &api.ComponentStatusList{
		Items: []api.ComponentStatus{
			*(createTestStatus("test1", api.ConditionUnknown, "", "Get http://testserver1:8000/healthz: fizzbuzz error"))},
	}
	if e, a := expect, got; !reflect.DeepEqual(e, a) {
		t.Errorf("Got unexpected object. Diff: %s", util.ObjectDiff(e, a))
	}
}

// TestNamespaceContext validates that a namespace can be get/set on a context object
func TestNamespaceContext(t *testing.T) {
	ctx := api.NewDefaultContext()
	result, ok := api.NamespaceFrom(ctx)
	if !ok {
		t.Errorf("Error getting namespace")
	}
	if api.NamespaceDefault != result {
		t.Errorf("Expected: %v, Actual: %v", api.NamespaceDefault, result)
	}

	ctx = api.NewContext()
	result, ok = api.NamespaceFrom(ctx)
	if ok {
		t.Errorf("Should not be ok because there is no namespace on the context")
	}
}