mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
// Copyright 2021 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 backend_test
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import (
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"context"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"go.etcd.io/etcd/server/v3/mvcc/backend"
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betesting "go.etcd.io/etcd/server/v3/mvcc/backend/testing"
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)
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var (
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bucket = []byte("bucket")
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key = []byte("key")
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)
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func TestBackendPreCommitHook(t *testing.T) {
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be := newTestHooksBackend(t, backend.DefaultBackendConfig())
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tx := be.BatchTx()
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prepareBuckenAndKey(tx)
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tx.Commit()
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// Empty commit.
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tx.Commit()
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write(tx, []byte("foo"), []byte("bar"))
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assert.Equal(t, ">cc", getCommitsKey(t, be), "expected 2 explict commits")
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tx.Commit()
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assert.Equal(t, ">ccc", getCommitsKey(t, be), "expected 3 explict commits")
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}
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func TestBackendAutoCommitLimitHook(t *testing.T) {
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cfg := backend.DefaultBackendConfig()
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cfg.BatchLimit = 3
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be := newTestHooksBackend(t, cfg)
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tx := be.BatchTx()
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prepareBuckenAndKey(tx) // writes 2 entries.
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for i := 3; i <= 9; i++ {
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write(tx, []byte("i"), []byte{byte(i)})
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}
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assert.Equal(t, ">ccc", getCommitsKey(t, be))
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}
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func write(tx backend.BatchTx, k, v []byte) {
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tx.Lock()
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defer tx.Unlock()
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tx.UnsafePut(bucket, k, v)
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}
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func TestBackendAutoCommitBatchIntervalHook(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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cfg := backend.DefaultBackendConfig()
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cfg.BatchInterval = 10 * time.Millisecond
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be := newTestHooksBackend(t, cfg)
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tx := be.BatchTx()
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prepareBuckenAndKey(tx)
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// Edits trigger an auto-commit
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waitUntil(ctx, t, func() bool { return getCommitsKey(t, be) == ">c" })
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time.Sleep(time.Second)
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// No additional auto-commits, as there were no more edits
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assert.Equal(t, ">c", getCommitsKey(t, be))
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write(tx, []byte("foo"), []byte("bar1"))
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waitUntil(ctx, t, func() bool { return getCommitsKey(t, be) == ">cc" })
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write(tx, []byte("foo"), []byte("bar1"))
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waitUntil(ctx, t, func() bool { return getCommitsKey(t, be) == ">ccc" })
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}
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func waitUntil(ctx context.Context, t testing.TB, f func() bool) {
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for !f() {
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select {
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case <-ctx.Done():
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t.Fatalf("Context cancelled/timedout without condition met: %v", ctx.Err())
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default:
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}
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time.Sleep(10 * time.Millisecond)
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}
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}
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func prepareBuckenAndKey(tx backend.BatchTx) {
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tx.Lock()
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defer tx.Unlock()
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tx.UnsafeCreateBucket(bucket)
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tx.UnsafePut(bucket, key, []byte(">"))
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}
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func newTestHooksBackend(t testing.TB, baseConfig backend.BackendConfig) backend.Backend {
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cfg := baseConfig
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cfg.Hooks = backend.NewHooks(func(tx backend.BatchTx) {
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k, v := tx.UnsafeRange(bucket, key, nil, 1)
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t.Logf("OnPreCommit executed: %v %v", string(k[0]), string(v[0]))
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assert.Len(t, k, 1)
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assert.Len(t, v, 1)
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tx.UnsafePut(bucket, key, append(v[0], byte('c')))
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})
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be, _ := betesting.NewTmpBackendFromCfg(t, cfg)
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t.Cleanup(func() {
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betesting.Close(t, be)
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})
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return be
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}
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func getCommitsKey(t testing.TB, be backend.Backend) string {
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rtx := be.BatchTx()
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rtx.Lock()
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defer rtx.Unlock()
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_, v := rtx.UnsafeRange(bucket, key, nil, 1)
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assert.Len(t, v, 1)
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return string(v[0])
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}
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