custom resource De-Registration testcase

staging/src/k8s.io/kube-apiextensions-server/test/integration/BUILD

@@ -18,6 +18,7 @@ go_test(
         "integration",
     ],
     deps = [
+        "//vendor/k8s.io/apimachinery/pkg/api/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/api/meta:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",

staging/src/k8s.io/kube-apiextensions-server/test/integration/registration_test.go

@@ -21,6 +21,7 @@ import (
 	"testing"
 	"time"
 
+	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
@@ -242,5 +243,98 @@ func TestMultipleRegistration(t *testing.T) {
 	if e, a := createdNoxuInstance, gottenNoxuInstance2; !reflect.DeepEqual(e, a) {
 		t.Errorf("expected %v, got %v", e, a)
 	}
+}
+
+func TestDeRegistrationAndReRegistration(t *testing.T) {
+	stopCh, apiExtensionClient, clientPool, err := testserver.StartDefaultServer()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer close(stopCh)
+	noxuDefinition := testserver.NewNoxuCustomResourceDefinition()
+	ns := "not-the-default"
+	sameInstanceName := "foo"
+	func() {
+		noxuVersionClient, err := testserver.CreateNewCustomResourceDefinition(noxuDefinition, apiExtensionClient, clientPool)
+		if err != nil {
+			t.Fatal(err)
+		}
+		noxuNamespacedResourceClient := NewNamespacedCustomResourceClient(ns, noxuVersionClient, noxuDefinition)
+		if _, err := instantiateCustomResource(t, testserver.NewNoxuInstance(ns, sameInstanceName), noxuNamespacedResourceClient, noxuDefinition); err != nil {
+			t.Fatal(err)
+		}
+		// Remove sameInstanceName since at the moment there's no finalizers.
+		// TODO: as soon finalizers will be implemented Delete can be removed.
+		if err := noxuNamespacedResourceClient.Delete(sameInstanceName, nil); err != nil {
+			t.Fatal(err)
+		}
+		if err := testserver.DeleteCustomResourceDefinition(noxuDefinition, apiExtensionClient); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := testserver.GetCustomResourceDefinition(noxuDefinition, apiExtensionClient); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+		if _, err = noxuNamespacedResourceClient.List(metav1.ListOptions{}); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+		if _, err = noxuNamespacedResourceClient.Get("foo"); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+	}()
 
+	func() {
+		if _, err := testserver.GetCustomResourceDefinition(noxuDefinition, apiExtensionClient); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+		noxuVersionClient, err := testserver.CreateNewCustomResourceDefinition(noxuDefinition, apiExtensionClient, clientPool)
+		if err != nil {
+			t.Fatal(err)
+		}
+		noxuNamespacedResourceClient := NewNamespacedCustomResourceClient(ns, noxuVersionClient, noxuDefinition)
+		initialList, err := noxuNamespacedResourceClient.List(metav1.ListOptions{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if _, err = noxuNamespacedResourceClient.Get(sameInstanceName); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+		if e, a := 0, len(initialList.(*unstructured.UnstructuredList).Items); e != a {
+			t.Fatalf("expected %v, got %v", e, a)
+		}
+		createdNoxuInstance, err := instantiateCustomResource(t, testserver.NewNoxuInstance(ns, sameInstanceName), noxuNamespacedResourceClient, noxuDefinition)
+		if err != nil {
+			t.Fatal(err)
+		}
+		gottenNoxuInstance, err := noxuNamespacedResourceClient.Get(sameInstanceName)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if e, a := createdNoxuInstance, gottenNoxuInstance; !reflect.DeepEqual(e, a) {
+			t.Fatalf("expected %v, got %v", e, a)
+		}
+		listWithItem, err := noxuNamespacedResourceClient.List(metav1.ListOptions{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if e, a := 1, len(listWithItem.(*unstructured.UnstructuredList).Items); e != a {
+			t.Fatalf("expected %v, got %v", e, a)
+		}
+		if e, a := *createdNoxuInstance, listWithItem.(*unstructured.UnstructuredList).Items[0]; !reflect.DeepEqual(e, a) {
+			t.Fatalf("expected %v, got %v", e, a)
+		}
+
+		if err := noxuNamespacedResourceClient.Delete(sameInstanceName, nil); err != nil {
+			t.Fatal(err)
+		}
+		if _, err = noxuNamespacedResourceClient.Get(sameInstanceName); err == nil || !errors.IsNotFound(err) {
+			t.Fatalf("expected a NotFound error, got:%v", err)
+		}
+		listWithoutItem, err := noxuNamespacedResourceClient.List(metav1.ListOptions{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if e, a := 0, len(listWithoutItem.(*unstructured.UnstructuredList).Items); e != a {
+			t.Fatalf("expected %v, got %v", e, a)
+		}
+	}()
 }

staging/src/k8s.io/kube-apiextensions-server/test/integration/testserver/BUILD

@@ -16,6 +16,7 @@ go_library(
     tags = ["automanaged"],
     deps = [
         "//vendor/github.com/pborman/uuid:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",

staging/src/k8s.io/kube-apiextensions-server/test/integration/testserver/resources.go

@@ -19,6 +19,7 @@ package testserver
 import (
 	"time"
 
+	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime/schema"
@@ -123,3 +124,23 @@ func CreateNewCustomResourceDefinition(customResourceDefinition *apiextensionsv1
 	}
 	return dynamicClient, nil
 }
+
+func DeleteCustomResourceDefinition(customResource *apiextensionsv1alpha1.CustomResourceDefinition, apiExtensionsClient clientset.Interface) error {
+	if err := apiExtensionsClient.Apiextensions().CustomResourceDefinitions().Delete(customResource.Name, nil); err != nil {
+		return err
+	}
+	err := wait.PollImmediate(30*time.Millisecond, 30*time.Second, func() (bool, error) {
+		if _, err := apiExtensionsClient.Discovery().ServerResourcesForGroupVersion(customResource.Spec.Group + "/" + customResource.Spec.Version); err != nil {
+			if errors.IsNotFound(err) {
+				return true, nil
+			}
+			return false, err
+		}
+		return false, nil
+	})
+	return err
+}
+
+func GetCustomResourceDefinition(customResource *apiextensionsv1alpha1.CustomResourceDefinition, apiExtensionsClient clientset.Interface) (*apiextensionsv1alpha1.CustomResourceDefinition, error) {
+	return apiExtensionsClient.Apiextensions().CustomResourceDefinitions().Get(customResource.Name, metav1.GetOptions{})
+}