// Copyright 2020 Google Inc. All Rights Reserved.
//
// 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 metrics

import (
	"testing"
	"time"
)

func TestEnd(t *testing.T) {
	startTime := time.Date(2020, time.July, 13, 13, 0, 0, 0, time.UTC)
	var dur time.Duration
	initialNow := _now
	_now = func() time.Time { return startTime.Add(dur) }
	defer func() { _now = initialNow }()

	event := newEvent(nil, "test", "test")

	dur = 10 * time.Nanosecond
	perf := event.perfInfo()

	if perf.GetRealTime() != uint64(dur.Nanoseconds()) {
		t.Errorf("got %d, want %d nanoseconds for event duration", perf.GetRealTime(), dur.Nanoseconds())
	}
}

func TestEndWithError(t *testing.T) {
	startTime := time.Date(2020, time.July, 13, 13, 0, 0, 0, time.UTC)
	var dur time.Duration
	initialNow := _now
	_now = func() time.Time { return startTime.Add(dur) }
	defer func() { _now = initialNow }()

	err := "foobar"
	event := newEvent(nil, "test", "test")
	event.SetFatalOrPanicMessage(err)

	dur = 10 * time.Nanosecond
	perf := event.perfInfo()

	if msg := perf.GetErrorMessage(); msg != err {
		t.Errorf("got %q, want %q for even error message", msg, err)
	}
}