add test for the registered feature gates

hack/verify-test-featuregates.sh

@@ -53,4 +53,19 @@ if [[ -n "${missing_defers}" ]]; then
   rc=1
 fi
 
+
+# ensure all generic features are added in alphabetic order
+lines=$(git grep 'genericfeatures[.].*:' -- pkg/features/kube_features.go)
+sorted_lines=$(echo "$lines" | sort -f)
+if [[ "$lines" != "$sorted_lines" ]]; then
+  echo "Generic features in pkg/features/kube_features.go not sorted" >&2
+  echo >&2
+  echo "Expected:" >&2
+  echo "$sorted_lines" >&2
+  echo >&2
+  echo "Got:" >&2
+  echo "$lines" >&2
+  rc=1
+fi
+
 exit $rc

pkg/features/kube_features.go

@@ -1157,28 +1157,46 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	genericfeatures.APIResponseCompression: {Default: true, PreRelease: featuregate.Beta},
 
+	genericfeatures.APIServerIdentity: {Default: true, PreRelease: featuregate.Beta},
+
+	genericfeatures.APIServerTracing: {Default: true, PreRelease: featuregate.Beta},
+
+	genericfeatures.ConsistentListFromCache: {Default: false, PreRelease: featuregate.Alpha},
+
+	genericfeatures.CustomResourceValidationExpressions: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
+
+	genericfeatures.EfficientWatchResumption: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
+
 	genericfeatures.KMSv1: {Default: false, PreRelease: featuregate.Deprecated},
 
 	genericfeatures.KMSv2: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
 
 	genericfeatures.KMSv2KDF: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
 
-	genericfeatures.ValidatingAdmissionPolicy: {Default: false, PreRelease: featuregate.Beta},
-
-	genericfeatures.CustomResourceValidationExpressions: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
-
 	genericfeatures.OpenAPIEnums: {Default: true, PreRelease: featuregate.Beta},
 
+	genericfeatures.RemainingItemCount: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
+
 	genericfeatures.ServerSideApply: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.29
 
 	genericfeatures.ServerSideFieldValidation: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.29
 
+	genericfeatures.StorageVersionAPI: {Default: false, PreRelease: featuregate.Alpha},
+
+	genericfeatures.StorageVersionHash: {Default: true, PreRelease: featuregate.Beta},
+
 	genericfeatures.StructuredAuthenticationConfiguration: {Default: false, PreRelease: featuregate.Alpha},
 
 	genericfeatures.StructuredAuthorizationConfiguration: {Default: false, PreRelease: featuregate.Alpha},
 
 	genericfeatures.UnauthenticatedHTTP2DOSMitigation: {Default: true, PreRelease: featuregate.Beta},
 
+	genericfeatures.ValidatingAdmissionPolicy: {Default: false, PreRelease: featuregate.Beta},
+
+	genericfeatures.WatchBookmark: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
+
+	genericfeatures.WatchList: {Default: false, PreRelease: featuregate.Alpha},
+
 	genericfeatures.ZeroLimitedNominalConcurrencyShares: {Default: false, PreRelease: featuregate.Beta},
 
 	// inherited features from apiextensions-apiserver, relisted here to get a conflict if it is changed

pkg/features/kube_features_test.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2024 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 features
+
+import (
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"testing"
+)
+
+func TestKubeFeatures(t *testing.T) {
+	features := utilfeature.DefaultFeatureGate.DeepCopy().GetAll()
+
+	for i := range features {
+		featureName := string(i)
+
+		if featureName == "AllAlpha" || featureName == "AllBeta" {
+			continue
+		}
+
+		if _, ok := defaultKubernetesFeatureGates[i]; !ok {
+			t.Errorf("The feature gate %q is not registered", featureName)
+		}
+	}
+}