Add e2e tests

vendor/k8s.io/apimachinery/pkg/util/uuid/uuid.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2014 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 uuid
+
+import (
+	"sync"
+
+	"github.com/pborman/uuid"
+
+	"k8s.io/apimachinery/pkg/types"
+)
+
+var uuidLock sync.Mutex
+var lastUUID uuid.UUID
+
+func NewUUID() types.UID {
+	uuidLock.Lock()
+	defer uuidLock.Unlock()
+	result := uuid.NewUUID()
+	// The UUID package is naive and can generate identical UUIDs if the
+	// time interval is quick enough.
+	// The UUID uses 100 ns increments so it's short enough to actively
+	// wait for a new value.
+	for uuid.Equal(lastUUID, result) == true {
+		result = uuid.NewUUID()
+	}
+	lastUUID = result
+	return types.UID(result.String())
+}