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// Copyright 2015 The etcd 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 idutil
import (
"testing"
"time"
)
func TestNewGenerator(t *testing.T) {
g := NewGenerator(0x12, time.Unix(0, 0).Add(0x3456*time.Millisecond))
id := g.Next()
wid := uint64(0x12000000345601)
if id != wid {
t.Errorf("id = %x, want %x", id, wid)
}
}
func TestNewGeneratorUnique(t *testing.T) {
g := NewGenerator(0, time.Time{})
id := g.Next()
// different server generates different ID
g1 := NewGenerator(1, time.Time{})
if gid := g1.Next(); id == gid {
t.Errorf("generate the same id %x using different server ID", id)
}
// restarted server generates different ID
g2 := NewGenerator(0, time.Now())
if gid := g2.Next(); id == gid {
t.Errorf("generate the same id %x after restart", id)
}
}
func TestNext(t *testing.T) {
g := NewGenerator(0x12, time.Unix(0, 0).Add(0x3456*time.Millisecond))
wid := uint64(0x12000000345601)
for i := 0; i < 1000; i++ {
id := g.Next()
if id != wid+uint64(i) {
t.Errorf("id = %x, want %x", id, wid+uint64(i))
}
}
}
func BenchmarkNext(b *testing.B) {
g := NewGenerator(0x12, time.Now())
b.ResetTimer()
for i := 0; i < b.N; i++ {
g.Next()
}
}
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