/*
   Copyright 2014 CoreOS, Inc.

   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 store

import (
	"testing"
	"time"

	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/stretchr/testify/assert"
)

// Ensure that a successful Get is recorded in the stats.
func TestStoreStatsGetSuccess(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.Get("/foo", false, false)
	assert.Equal(t, uint64(1), s.Stats.GetSuccess, "")
}

// Ensure that a failed Get is recorded in the stats.
func TestStoreStatsGetFail(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.Get("/no_such_key", false, false)
	assert.Equal(t, uint64(1), s.Stats.GetFail, "")
}

// Ensure that a successful Create is recorded in the stats.
func TestStoreStatsCreateSuccess(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	assert.Equal(t, uint64(1), s.Stats.CreateSuccess, "")
}

// Ensure that a failed Create is recorded in the stats.
func TestStoreStatsCreateFail(t *testing.T) {
	s := newStore()
	s.Create("/foo", true, "", false, Permanent)
	s.Create("/foo", false, "bar", false, Permanent)
	assert.Equal(t, uint64(1), s.Stats.CreateFail, "")
}

// Ensure that a successful Update is recorded in the stats.
func TestStoreStatsUpdateSuccess(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.Update("/foo", "baz", Permanent)
	assert.Equal(t, uint64(1), s.Stats.UpdateSuccess, "")
}

// Ensure that a failed Update is recorded in the stats.
func TestStoreStatsUpdateFail(t *testing.T) {
	s := newStore()
	s.Update("/foo", "bar", Permanent)
	assert.Equal(t, uint64(1), s.Stats.UpdateFail, "")
}

// Ensure that a successful CAS is recorded in the stats.
func TestStoreStatsCompareAndSwapSuccess(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.CompareAndSwap("/foo", "bar", 0, "baz", Permanent)
	assert.Equal(t, uint64(1), s.Stats.CompareAndSwapSuccess, "")
}

// Ensure that a failed CAS is recorded in the stats.
func TestStoreStatsCompareAndSwapFail(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.CompareAndSwap("/foo", "wrong_value", 0, "baz", Permanent)
	assert.Equal(t, uint64(1), s.Stats.CompareAndSwapFail, "")
}

// Ensure that a successful Delete is recorded in the stats.
func TestStoreStatsDeleteSuccess(t *testing.T) {
	s := newStore()
	s.Create("/foo", false, "bar", false, Permanent)
	s.Delete("/foo", false, false)
	assert.Equal(t, uint64(1), s.Stats.DeleteSuccess, "")
}

// Ensure that a failed Delete is recorded in the stats.
func TestStoreStatsDeleteFail(t *testing.T) {
	s := newStore()
	s.Delete("/foo", false, false)
	assert.Equal(t, uint64(1), s.Stats.DeleteFail, "")
}

//Ensure that the number of expirations is recorded in the stats.
func TestStoreStatsExpireCount(t *testing.T) {
	s := newStore()
	fc := newFakeClock()
	s.clock = fc

	s.Create("/foo", false, "bar", false, fc.Now().Add(500*time.Millisecond))
	assert.Equal(t, uint64(0), s.Stats.ExpireCount, "")
	fc.Advance(600 * time.Millisecond)
	s.DeleteExpiredKeys(fc.Now())
	assert.Equal(t, uint64(1), s.Stats.ExpireCount, "")
}