57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package idutil
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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)
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func TestNewGenerator(t *testing.T) {
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g := NewGenerator(0x12, time.Unix(0, 0).Add(0x3456*time.Millisecond))
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id := g.Next()
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wid := uint64(0x12000000345601)
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assert.Equalf(t, id, wid, "id = %x, want %x", id, wid)
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}
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func TestNewGeneratorUnique(t *testing.T) {
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g := NewGenerator(0, time.Time{})
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id := g.Next()
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// different server generates different ID
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assert.NotEqualf(t, id, NewGenerator(1, time.Time{}).Next(), "generate the same id %x using different server ID", id)
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// restarted server generates different ID
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assert.NotEqualf(t, id, NewGenerator(0, time.Now()).Next(), "generate the same id %x after restart", id)
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}
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func TestNext(t *testing.T) {
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g := NewGenerator(0x12, time.Unix(0, 0).Add(0x3456*time.Millisecond))
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wid := uint64(0x12000000345601)
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for i := 0; i < 1000; i++ {
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id := g.Next()
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assert.Equalf(t, id, wid+uint64(i), "id = %x, want %x", id, wid+uint64(i))
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}
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}
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func BenchmarkNext(b *testing.B) {
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g := NewGenerator(0x12, time.Now())
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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g.Next()
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}
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}
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