// Copyright 2016 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.

package prometheus

import (
	"testing"

	dto "github.com/prometheus/client_model/go"
)

func TestTimerObserve(t *testing.T) {
	his := NewHistogram(
		HistogramOpts{
			Name: "test_histogram",
		},
	)

	timer := NewTimer().With(his)
	timer.ObserveDuration()
	m := &dto.Metric{}
	his.Write(m)

	for _, b := range m.Histogram.Bucket {
		if int(b.GetCumulativeCount()) > 0 {
			return
		}
	}

	t.Fatalf("no counts recorded")
}