Added conversions to/from NamespacedName

Also renamed file to something more on-point.

Kubernetes-commit: 8d92cfb13163f596feddfe1b5e734fd1ba4f6323

tools/cache/object-names_test.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2023 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 cache
+
+import (
+	"math/rand"
+	"strings"
+	"testing"
+)
+
+func TestObjectNames(t *testing.T) {
+	chars := "abcdefghi/"
+	for count := 1; count <= 100; count++ {
+		var encodedB strings.Builder
+		for index := 0; index < 10; index++ {
+			encodedB.WriteByte(chars[rand.Intn(len(chars))])
+		}
+		encodedS := encodedB.String()
+		parts := strings.Split(encodedS, "/")
+		on, err := ParseObjectName(encodedS)
+		expectError := len(parts) > 2
+		if expectError != (err != nil) {
+			t.Errorf("Wrong error; expected=%v, got=%v", expectError, err)
+		}
+		if expectError || err != nil {
+			continue
+		}
+		var expectedObjectName ObjectName
+		if len(parts) == 2 {
+			expectedObjectName = ObjectName{Namespace: parts[0], Name: parts[1]}
+		} else {
+			expectedObjectName = ObjectName{Name: encodedS}
+		}
+		if on != expectedObjectName {
+			t.Errorf("Parse failed, expected=%+v, got=%+v", expectedObjectName, on)
+		}
+		recoded := on.String()
+		if encodedS[0] == '/' {
+			recoded = "/" + recoded
+		}
+		if encodedS != recoded {
+			t.Errorf("Parse().String() was not identity, original=%q, final=%q", encodedS, recoded)
+		}
+	}
+}