Add Name() to ClusterManager (#626)

Signed-off-by: Tamal Saha <[email protected]>

Author: tamalsaha

api/v1/cluster.go

@@ -21,6 +21,7 @@ import (
 	"crypto/sha256"
 	"encoding/base64"
 	"fmt"
+	"math/bits"
 	"strings"
 )
 
@@ -177,6 +178,18 @@ func (cm ClusterManager) Strings() []string {
 	return out
 }
 
+func isPowerOfTwo(n int) bool {
+	return n > 0 && (n&(n-1)) == 0
+}
+
+func (cm ClusterManager) Name() string {
+	if !isPowerOfTwo(int(cm)) {
+		return cm.String()
+	}
+	idx := bits.TrailingZeros(uint(cm))
+	return _ClusterManagerNames[idx]
+}
+
 func (cm ClusterManager) String() string {
 	return strings.Join(cm.Strings(), ",")
 }

api/v1/cluster_test.go

@@ -0,0 +1,41 @@
+/*
+Copyright AppsCode Inc. and Contributors
+
+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 v1
+
+import "testing"
+
+func TestClusterManager_Name(t *testing.T) {
+	tests := []struct {
+		name string
+		cm   ClusterManager
+		want string
+	}{
+		{
+			name: "ClusterManagerOpenShift",
+			cm:   ClusterManagerOpenShift,
+			want: "OpenShift",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := tt.cm.Name()
+			if got != tt.want {
+				t.Errorf("Name() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}