github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/logtail/service/waterline_test.go (about) 1 // Copyright 2021 Matrix Origin 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package service 16 17 import ( 18 "testing" 19 "time" 20 21 "github.com/matrixorigin/matrixone/pkg/pb/timestamp" 22 "github.com/matrixorigin/matrixone/pkg/txn/clock" 23 "github.com/stretchr/testify/require" 24 ) 25 26 func TestWaterliner(t *testing.T) { 27 current := mockTimestamp(100, 100) 28 clock := mockPermanentClock(current) 29 30 w := NewWaterliner(clock) 31 32 /* ---- advance on uninitialized instance ---- */ 33 require.Panics(t, func() { 34 w.Advance(current) 35 }) 36 37 /* ---- initialized on its first call ---- */ 38 waterline := w.Waterline() 39 require.Equal(t, current, waterline) 40 41 /* ---- advance with a backward ts ---- */ 42 require.Panics(t, func() { 43 prev := current.Prev() 44 w.Advance(prev) 45 }) 46 47 /* ---- advance with a monotonous ts ---- */ 48 next := current.Next() 49 w.Advance(next) 50 waterline = w.Waterline() 51 require.Equal(t, next, waterline) 52 } 53 54 type permanentClock struct { 55 ts timestamp.Timestamp 56 } 57 58 func mockPermanentClock(ts timestamp.Timestamp) clock.Clock { 59 return &permanentClock{ 60 ts: ts, 61 } 62 } 63 64 func (m *permanentClock) Now() (timestamp.Timestamp, timestamp.Timestamp) { 65 return m.ts, timestamp.Timestamp{} 66 } 67 68 func (m *permanentClock) Update(ts timestamp.Timestamp) { 69 m.ts = ts 70 } 71 72 func (m *permanentClock) HasNetworkLatency() bool { 73 return false 74 } 75 76 func (m *permanentClock) MaxOffset() time.Duration { 77 return 0 78 } 79 80 func (m *permanentClock) SetNodeID(id uint16) { 81 82 }