// 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"

	"github.com/prometheus/client_golang/prometheus"
	"github.com/stretchr/testify/assert"
	"golang.org/x/sync/errgroup"
)

func TestRegisterMetrics(t *testing.T) {
	assert.NotPanics(t, func() {
		r := prometheus.NewRegistry()
		// Make sure it doesn't panic.
		RegisterRootCoord(r)
		RegisterDataNode(r)
		RegisterDataCoord(r)
		RegisterIndexNode(r)
		RegisterProxy(r)
		RegisterQueryNode(r)
		RegisterQueryCoord(r)
		RegisterMetaMetrics(r)
		RegisterStorageMetrics(r)
		RegisterMsgStreamMetrics(r)
	})
}

func TestGetRegisterer(t *testing.T) {
	register := GetRegisterer()
	assert.NotNil(t, register)
	assert.Equal(t, prometheus.DefaultRegisterer, register)
	r := prometheus.NewRegistry()
	Register(r)
	register = GetRegisterer()
	assert.NotNil(t, register)
	assert.Equal(t, r, register)
}

func TestRegisterRuntimeInfo(t *testing.T) {
	g := &errgroup.Group{}
	g.Go(func() error {
		RegisterMetaType("etcd")
		return nil
	})
	g.Go(func() error {
		RegisterMQType("pulsar")
		return nil
	})
	g.Wait()

	infoMutex.Lock()
	defer infoMutex.Unlock()
	assert.Equal(t, "etcd", metaType)
	assert.Equal(t, "pulsar", mqType)
}