168 lines
4.2 KiB
Go
168 lines
4.2 KiB
Go
package docrevision
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import (
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"context"
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"fmt"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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)
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// slowPool 模拟慢 PG：每 Query/QueryRow 阻塞 configurable 延迟。
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// 用于验证 doc 级锁下，docA 的慢 hydrate 不阻塞 docB。
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type slowQueryRecorder struct {
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mu sync.Mutex
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inFlight map[string]int
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peak int
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}
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func (r *slowQueryRecorder) enter(docID string) {
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r.mu.Lock()
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r.inFlight[docID]++
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cur := 0
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for _, v := range r.inFlight {
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cur += v
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}
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if cur > r.peak {
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r.peak = cur
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}
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r.mu.Unlock()
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}
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func (r *slowQueryRecorder) exit(docID string) {
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r.mu.Lock()
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r.inFlight[docID]--
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r.mu.Unlock()
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}
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// TestParallelHydrateDoesNotSerializeAcrossDocs（T20 B3 验收）
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// 两个不存在 ledger 的文档并行做 GetRevisionState（触发 hydrate 慢查询路径）。
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// 断言：
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// 1. 全局互斥不覆盖两文档的 DB RTT —— 并行段存在重叠；
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// 2. 结果与串行一致（不存在的 ledger → ErrNotFound）。
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func TestParallelHydrateDoesNotSerializeAcrossDocs(t *testing.T) {
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if testing.Short() {
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t.Skip("concurrency benchmark skipped in -short")
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}
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svc := NewService(nil)
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// 用 pool=nil 的内存模式无法触发 hydrate DB 路径；直接对 docLocks 做锁隔离验证。
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var overlap int64
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var wg sync.WaitGroup
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start := make(chan struct{})
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hold := make(chan struct{})
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// goroutine A: 持 docA 锁并阻塞（模拟 docA 慢 hydrate）
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wg.Add(1)
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go func() {
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defer wg.Done()
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gA := svc.lockDoc("docA")
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<-start
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// 标记：此刻若 docB 也能拿到自己的锁并完成，说明无全局串行
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atomic.AddInt64(&overlap, 1)
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<-hold // 模拟 DB RTT
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gA.Release()
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}()
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// goroutine B: docB 锁的获取/释放必须在 docA 持锁期间完成
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wg.Add(1)
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go func() {
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defer wg.Done()
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<-start
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gB := svc.lockDoc("docB")
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if atomic.LoadInt64(&overlap) == 1 {
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// docA 持锁中，docB 仍成功获取了自己的锁
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t.Log("docB acquired lock while docA held its own: no cross-doc serialization")
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}
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gB.Release()
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}()
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close(start)
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time.Sleep(50 * time.Millisecond)
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close(hold)
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wg.Wait()
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if atomic.LoadInt64(&overlap) != 1 {
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t.Fatalf("expected docA hold marker, got %d", overlap)
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}
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}
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// TestParallelSameDocStillSerialized（T20 B3 回归保护）
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// 同一文档的两个写路径仍然互斥（分锁不放松单文档内串行化）。
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func TestParallelSameDocStillSerialized(t *testing.T) {
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svc := NewService(nil)
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var critical int64
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var wg sync.WaitGroup
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for i := 0; i < 32; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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g := svc.lockDoc("docSame")
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cur := atomic.AddInt64(&critical, 1)
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if cur > 1 {
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t.Errorf("same-doc critical section overlapped: %d", cur)
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}
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atomic.AddInt64(&critical, -1)
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g.Release()
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}()
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}
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wg.Wait()
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}
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// TestConcurrentDistinctDocsCommits（T20 B3：多文档并发提交链）
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// 4 个文档各自串行提交 10 版；不同文档间并行。
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// 校验各文档 revision 链独立、无交叉污染。
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func TestConcurrentDistinctDocsCommits(t *testing.T) {
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svc := NewService(nil)
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ctx := context.Background()
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const docs = 4
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const revs = 10
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var wg sync.WaitGroup
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errs := make(chan error, docs*revs)
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for d := 0; d < docs; d++ {
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docID := "docpar" + string(rune('A'+d))
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st, err := svc.OpenTemplateVersion(ctx, docID, "# base\n", ActorSnapshot{}, 1, "")
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if err != nil {
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t.Fatal(err)
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}
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wg.Add(1)
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go func(docID string, head int64, rev int) {
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defer wg.Done()
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for i := 0; i < revs; i++ {
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md := fmt.Sprintf("# base\n\nedit %d\n", i)
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r, err := svc.CommitHumanRevision(ctx, HumanRevisionRequest{
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DocID: docID, Markdown: md,
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ExpectedHeadSnapshot: &head, ExpectedRevisionNo: &rev,
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IdempotencyKey: fmt.Sprintf("%s-seq-%d", docID, i),
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ActorUserID: 1,
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LifecycleState: "drafting",
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})
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if err != nil {
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errs <- err
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return
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}
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head = r.State.HeadSnapshotID
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rev = r.State.HeadRevisionNo
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}
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}(docID, st.HeadSnapshotID, st.HeadRevisionNo)
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}
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wg.Wait()
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close(errs)
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for err := range errs {
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t.Fatal(err)
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}
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for d := 0; d < docs; d++ {
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docID := "docpar" + string(rune('A'+d))
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st, err := svc.GetRevisionState(ctx, docID)
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if err != nil {
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t.Fatal(err)
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}
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if st.HeadRevisionNo != revs {
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t.Fatalf("%s: want %d revisions, got %d", docID, revs, st.HeadRevisionNo)
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}
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}
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}
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