// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 metrics

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
)

func TestThreadWatcher(t *testing.T) {
	watcher := NewThreadWatcher()

	watcher.Start()

	ch := make(chan struct{})
	go func() {
		defer close(ch)
		watcher.Stop()
	}()
	select {
	case <-ch:
	case <-time.After(time.Second * 5):
		assert.FailNow(t, "watcher failed to close after 5 seconds")
	}
}