| // 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)) |
| } |
| } |
| } |