// Copyright 2021 The Prometheus 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.

//go:build go1.17
// +build go1.17

package collectors

import (
	"encoding/json"
	"testing"

	"github.com/prometheus/client_golang/prometheus"
)

func TestGoCollectorMarshalling(t *testing.T) {
	reg := prometheus.NewRegistry()
	reg.MustRegister(NewGoCollector(
		WithGoCollections(GoRuntimeMemStatsCollection | GoRuntimeMetricsCollection),
	))
	result, err := reg.Gather()
	if err != nil {
		t.Fatal(err)
	}

	if _, err := json.Marshal(result); err != nil {
		t.Errorf("json marshalling shoud not fail, %v", err)
	}
}