mirror of https://github.com/tikv/client-go.git
113 lines
3.7 KiB
Go
113 lines
3.7 KiB
Go
// Copyright 2021 TiKV 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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// NOTE: The code in this file is based on code from the
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// TiDB project, licensed under the Apache License v 2.0
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//
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// https://github.com/pingcap/tidb/tree/cc5e161ac06827589c4966674597c137cc9e809c/store/tikv/retry/backoff_test.go
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//
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// Copyright 2019 PingCAP, Inc.
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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 retry
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import (
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"context"
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"errors"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestBackoffWithMax(t *testing.T) {
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b := NewBackofferWithVars(context.TODO(), 2000, nil)
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err := b.BackoffWithMaxSleepTxnLockFast(5, errors.New("test"))
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assert.Nil(t, err)
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assert.Equal(t, 5, b.totalSleep)
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}
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func TestBackoffErrorType(t *testing.T) {
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// the actual maxSleep is multiplied by weight, which is 1600ms
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b := NewBackofferWithVars(context.TODO(), 800, nil)
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err := b.Backoff(BoRegionMiss, errors.New("region miss")) // 2ms sleep
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assert.Nil(t, err)
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// 6ms sleep at most in total
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for i := 0; i < 2; i++ {
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err = b.Backoff(BoMaxDataNotReady, errors.New("data not ready"))
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assert.Nil(t, err)
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}
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// 100ms sleep at most in total
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err = b.Backoff(BoRegionRecoveryInProgress, errors.New("recovery in progress"))
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assert.Nil(t, err)
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// sleep from ServerIsBusy is not counted
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err = b.Backoff(BoTiKVServerBusy, errors.New("server is busy"))
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assert.Nil(t, err)
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// 1000ms sleep at most in total
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err = b.Backoff(BoIsWitness, errors.New("peer is witness"))
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assert.Nil(t, err)
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// wait it exceed max sleep
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for i := 0; i < 10; i++ {
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err = b.Backoff(BoTxnNotFound, errors.New("txn not found"))
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if err != nil {
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// Next backoff should return error of backoff that sleeps for longest time.
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assert.ErrorIs(t, err, BoTxnNotFound.err)
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return
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}
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}
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assert.Fail(t, "should not be here")
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}
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func TestBackoffDeepCopy(t *testing.T) {
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var err error
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b := NewBackofferWithVars(context.TODO(), 4, nil)
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// 700 ms sleep in total and the backoffer will return an error next time.
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for i := 0; i < 3; i++ {
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err = b.Backoff(BoMaxDataNotReady, errors.New("data not ready"))
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assert.Nil(t, err)
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}
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bForked, cancel := b.Fork()
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defer cancel()
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bCloned := b.Clone()
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for _, b := range []*Backoffer{bForked, bCloned} {
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err = b.Backoff(BoTiKVRPC, errors.New("tikv rpc"))
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assert.ErrorIs(t, err, BoMaxDataNotReady.err)
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}
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}
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func TestBackoffWithMaxExcludedExceed(t *testing.T) {
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setBackoffExcluded(BoTiKVServerBusy.name, 1)
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b := NewBackofferWithVars(context.TODO(), 1, nil)
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err := b.Backoff(BoTiKVServerBusy, errors.New("server is busy"))
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assert.Nil(t, err)
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// As the total excluded sleep is greater than the max limited value, error should be returned.
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err = b.Backoff(BoTiKVServerBusy, errors.New("server is busy"))
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assert.NotNil(t, err)
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assert.Greater(t, b.excludedSleep, b.maxSleep)
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}
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