kubeadm: add UT for ClusterConfiguration.EncryptionAlgorithmType()

cmd/kubeadm/app/apis/kubeadm/types_test.go

@@ -0,0 +1,71 @@
+/*
+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 kubeadm
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/cmd/kubeadm/app/features"
+)
+
+func TestClusterConfigurationEncryptionAlgorithmType(t *testing.T) {
+	tests := []struct {
+		name           string
+		cfg            *ClusterConfiguration
+		expectedResult EncryptionAlgorithmType
+	}{
+		{
+			name: "feature gate is set to true, return ECDSA-P256",
+			cfg: &ClusterConfiguration{
+				FeatureGates: map[string]bool{
+					features.PublicKeysECDSA: true,
+				},
+				EncryptionAlgorithm: EncryptionAlgorithmRSA4096,
+			},
+			expectedResult: EncryptionAlgorithmECDSAP256,
+		},
+		{
+			name: "feature gate is set to false, return the default RSA-2048",
+			cfg: &ClusterConfiguration{
+				FeatureGates: map[string]bool{
+					features.PublicKeysECDSA: false,
+				},
+			},
+			expectedResult: EncryptionAlgorithmRSA2048,
+		},
+		{
+			name: "feature gate is not set, return the field value",
+			cfg: &ClusterConfiguration{
+				EncryptionAlgorithm: EncryptionAlgorithmRSA4096,
+			},
+			expectedResult: EncryptionAlgorithmRSA4096,
+		},
+		{
+			name:           "feature gate and field are not set, return empty string",
+			cfg:            &ClusterConfiguration{},
+			expectedResult: "",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			if result := tc.cfg.EncryptionAlgorithmType(); result != tc.expectedResult {
+				t.Errorf("expected result: %s, got: %s", tc.expectedResult, result)
+			}
+		})
+	}
+}