Fix integration tests to pass with Kube 1.27/1.28 pre-release builds

Fix test failures that occurred in the k8s-main integration test CI job
when using Kube 1.27 and 1.28 pre-release builds.

test/integration/kube_api_discovery_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
+// Copyright 2020-2023 the Pinniped contributors. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
 package integration
@@ -458,10 +458,19 @@ func TestGetAPIResourceList(t *testing.T) { //nolint:gocyclo // each t.Run is pr
 				}
 				require.NotNilf(t, actualResourceList, "could not find groupVersion %s", groupVersion)
 
-				// Because its hard to predict the storage version hash (e.g. "t/+v41y+3e4="), we just don't
-				// worry about comparing that field.
 				for i := range actualResourceList.APIResources {
+					// Because its hard to predict the storage version hash (e.g. "t/+v41y+3e4="), we just don't
+					// worry about comparing that field.
 					actualResourceList.APIResources[i].StorageVersionHash = ""
+
+					// These fields were empty for a long time but started to be non-empty at some Kubernetes version.
+					// The filled-in fields were first noticed when CI tested against a 1.27 pre-release.
+					// To make this test pass on all versions of Kube, just ignore these fields for now.
+					actualResourceList.APIResources[i].Group = ""
+					actualResourceList.APIResources[i].Version = ""
+					if strings.HasSuffix(actualResourceList.APIResources[i].Name, "/status") {
+						actualResourceList.APIResources[i].SingularName = ""
+					}
 				}
 				require.ElementsMatch(t, expectedResources, actualResourceList.APIResources, "unexpected API resources")
 			}

test/integration/rbac_test.go

@@ -1,4 +1,4 @@
-// Copyright 2020-2021 the Pinniped contributors. All Rights Reserved.
+// Copyright 2020-2023 the Pinniped contributors. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
 package integration
@@ -47,9 +47,6 @@ func TestServiceAccountPermissions(t *testing.T) {
 	// the impersonation proxy SA has the same permissions for all checks because it should only be authorized via cluster role bindings
 
 	expectedResourceRules := []authorizationv1.ResourceRule{
-		// system:basic-user is bound to system:authenticated by default
-		{Verbs: []string{"create"}, APIGroups: []string{"authorization.k8s.io"}, Resources: []string{"selfsubjectaccessreviews", "selfsubjectrulesreviews"}},
-
 		// the expected impersonation permissions
 		{Verbs: []string{"impersonate"}, APIGroups: []string{""}, Resources: []string{"users", "groups", "serviceaccounts"}},
 		{Verbs: []string{"impersonate"}, APIGroups: []string{"authentication.k8s.io"}, Resources: []string{"*"}},
@@ -59,6 +56,23 @@ func TestServiceAccountPermissions(t *testing.T) {
 		{Verbs: []string{"create", "list"}, APIGroups: []string{"identity.concierge." + env.APIGroupSuffix}, Resources: []string{"whoamirequests"}},
 	}
 
+	// system:basic-user is bound to system:authenticated by default, so the SA gets these permissions too.
+	// See https://kubernetes.io/docs/reference/access-authn-authz/rbac/#discovery-roles.
+	// Note that this list previously only included "selfsubjectaccessreviews" and "selfsubjectrulesreviews",
+	// but later was updated in Kubernetes to also include "selfsubjectreviews".
+	// Rather than explicitly listing them all as expectations, dynamically append them here, so this test
+	// can pass against all versions of Kubernetes.
+	basicUserClusterRole, err := testlib.NewKubernetesClientset(t).RbacV1().ClusterRoles().Get(ctx, "system:basic-user", metav1.GetOptions{})
+	require.NoError(t, err)
+	for _, policyRule := range basicUserClusterRole.Rules {
+		expectedResourceRules = append(expectedResourceRules, authorizationv1.ResourceRule{
+			Verbs:         policyRule.Verbs,
+			APIGroups:     policyRule.APIGroups,
+			Resources:     policyRule.Resources,
+			ResourceNames: policyRule.ResourceNames,
+		})
+	}
+
 	if otherPinnipedGroupSuffix := getOtherPinnipedGroupSuffix(t); len(otherPinnipedGroupSuffix) > 0 {
 		expectedResourceRules = append(expectedResourceRules,
 			// we bind these to system:authenticated in the other instance of pinniped