test: strengthen concurrent seed coverage

backend/internal/seed/demo_postgres_test.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"os"
 	"sync"
-	"sync/atomic"
 	"testing"
 	"time"
 
@@ -17,6 +16,15 @@ import (
 	"senlinai-agent/backend/internal/models"
 )
 
+type demoSeedRunContextKey struct{}
+
+type demoSeedRunMarker string
+
+const (
+	firstDemoSeedRun  demoSeedRunMarker = "first"
+	secondDemoSeedRun demoSeedRunMarker = "second"
+)
+
 func TestPostgresDemoSeedSerializesConcurrentRunsForSameOwner(t *testing.T) {
 	dsn := os.Getenv("DATABASE_URL")
 	if dsn == "" {
@@ -50,71 +58,83 @@ func TestPostgresDemoSeedSerializesConcurrentRunsForSameOwner(t *testing.T) {
 		ProjectID: projects[0].ID, CreatedBy: user.ID, TagID: &uiTag.ID,
 		Title: "智能报表导出功能", Status: "open",
 	}).Error)
+	t.Cleanup(func() { cleanupPostgresDemoSeed(database, user.ID) })
 
-	var ownerLockObserved atomic.Bool
+	firstAtChildQuery := make(chan struct{}, 1)
-	var tagMisses atomic.Int32
+	secondOwnerQueryAttempted := make(chan struct{}, 1)
-	releaseTagMisses := make(chan struct{})
+	secondEnteredChildQuery := make(chan struct{}, 1)
+	releaseFirst := make(chan struct{})
+	var firstChildOnce sync.Once
 	var releaseOnce sync.Once
+	releaseFirstRun := func() { releaseOnce.Do(func() { close(releaseFirst) }) }
 	callbackName := "test:coordinate_concurrent_seed_" + suffix
-	require.NoError(t, database.Callback().Query().After("gorm:query").Register(callbackName, func(tx *gorm.DB) {
+	require.NoError(t, database.Callback().Query().Before("gorm:query").Register(callbackName, func(tx *gorm.DB) {
 		if tx.Statement.Schema == nil {
 			return
 		}
+		marker, ok := tx.Statement.Context.Value(demoSeedRunContextKey{}).(demoSeedRunMarker)
+		if !ok {
+			return
+		}
 		if tx.Statement.Schema.Table == (models.SenlinAgentUser{}).TableName() {
-			if _, ok := tx.Statement.Clauses["FOR"]; ok {
+			if _, locking := tx.Statement.Clauses["FOR"]; locking && marker == secondDemoSeedRun {
-				ownerLockObserved.Store(true)
+				signalDemoSeedStage(secondOwnerQueryAttempted)
 			}
 			return
 		}
-		if ownerLockObserved.Load() || tx.Statement.Schema.Table != (models.SenlinAgentTag{}).TableName() || tx.RowsAffected != 0 {
+		switch marker {
-			return
+		case firstDemoSeedRun:
-		}
+			firstChildOnce.Do(func() {
-		if tagMisses.Add(1) >= 2 {
+				signalDemoSeedStage(firstAtChildQuery)
-			releaseOnce.Do(func() { close(releaseTagMisses) })
+				<-releaseFirst
-		}
+			})
-		select {
+		case secondDemoSeedRun:
-		case <-releaseTagMisses:
+			signalDemoSeedStage(secondEnteredChildQuery)
-		case <-time.After(5 * time.Second):
-			tx.AddError(fmt.Errorf("timed out coordinating concurrent tag misses"))
 		}
 	}))
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	var wait sync.WaitGroup
+	firstResult := make(chan error, 1)
+	secondResult := make(chan error, 1)
 	t.Cleanup(func() {
+		cancel()
+		releaseFirstRun()
+		wait.Wait()
 		database.Callback().Query().Remove(callbackName)
-		cleanupPostgresDemoSeed(database, user.ID)
 	})
 
-	start := make(chan struct{})
-	results := make(chan error, 2)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-	var wait sync.WaitGroup
-	for range 2 {
 	wait.Add(1)
 	go func() {
 		defer wait.Done()
-			<-start
+		firstContext := context.WithValue(ctx, demoSeedRunContextKey{}, firstDemoSeedRun)
-			_, err := Demo(database.WithContext(ctx), DemoOptions{Email: email, DisplayName: "不应覆盖", Password: "new-password"})
+		_, err := Demo(database.WithContext(firstContext), DemoOptions{Email: email, DisplayName: "不应覆盖", Password: "new-password"})
-			results <- err
+		firstResult <- err
 	}()
-	}
+	waitForDemoSeedStage(t, ctx, firstAtChildQuery, "first Demo to hold the owner lock and reach its first child query")
-	close(start)
+
-	done := make(chan struct{})
+	wait.Add(1)
-	go func() {
+	go func() {
-		wait.Wait()
+		defer wait.Done()
-		close(done)
+		secondContext := context.WithValue(ctx, demoSeedRunContextKey{}, secondDemoSeedRun)
-	}()
+		_, err := Demo(database.WithContext(secondContext), DemoOptions{Email: email, DisplayName: "不应覆盖", Password: "new-password"})
-	select {
+		secondResult <- err
-	case <-done:
+	}()
-	case <-ctx.Done():
+	waitForDemoSeedStage(t, ctx, secondOwnerQueryAttempted, "second Demo to attempt the owner FOR UPDATE query")
-		<-done
+
-		t.Fatal("timed out waiting for concurrent Demo calls")
+	select {
-	}
+	case <-secondEnteredChildQuery:
-	close(results)
+		t.Fatal("second Demo entered a child query before the first released the owner lock")
-	for err := range results {
+	case err := <-secondResult:
-		require.NoError(t, err)
+		t.Fatalf("second Demo returned before the first released the owner lock: %v", err)
-	}
+	case <-time.After(200 * time.Millisecond):
+	case <-ctx.Done():
+		t.Fatal("timed out while proving the second Demo is blocked on the owner lock")
+	}
+	releaseFirstRun()
+	require.NoError(t, waitForDemoSeedResult(t, ctx, firstResult, "first Demo result"))
+	require.NoError(t, waitForDemoSeedResult(t, ctx, secondResult, "second Demo result"))
 
-	require.True(t, ownerLockObserved.Load(), "seed must lock the owner user row before creating child objects")
 	var storedUser models.SenlinAgentUser
 	require.NoError(t, database.Where("email = ?", email).First(&storedUser).Error)
 	require.Equal(t, "保留用户名称", storedUser.DisplayName)
@@ -133,6 +153,33 @@ func TestPostgresDemoSeedSerializesConcurrentRunsForSameOwner(t *testing.T) {
 	assertPostgresDemoCount(t, database, &models.SenlinAgentProjectChannel{}, "project_id = ?", []any{projects[0].ID}, 2)
 }
 
+func signalDemoSeedStage(stage chan<- struct{}) {
+	select {
+	case stage <- struct{}{}:
+	default:
+	}
+}
+
+func waitForDemoSeedStage(t *testing.T, ctx context.Context, stage <-chan struct{}, description string) {
+	t.Helper()
+	select {
+	case <-stage:
+	case <-ctx.Done():
+		t.Fatalf("timed out waiting for %s", description)
+	}
+}
+
+func waitForDemoSeedResult(t *testing.T, ctx context.Context, result <-chan error, description string) error {
+	t.Helper()
+	select {
+	case err := <-result:
+		return err
+	case <-ctx.Done():
+		t.Fatalf("timed out waiting for %s", description)
+		return ctx.Err()
+	}
+}
+
 func assertPostgresDemoCount(t *testing.T, database *gorm.DB, model any, where string, args []any, expected int64) {
 	t.Helper()
 	var count int64

backend/internal/seed/demo_test.go

@@ -2,6 +2,7 @@ package seed
 
 import (
 	"fmt"
+	"strings"
 	"sync/atomic"
 	"testing"
 	"time"
@@ -134,27 +135,65 @@ func TestDemoSeedAcceptsAConcurrentWinnerWithoutOverwritingUser(t *testing.T) {
 }
 
 func TestDemoSeedRetriesSerializationFailureOutsideTheTransaction(t *testing.T) {
+	for _, sqlState := range []string{"40001", "40P01"} {
+		t.Run(sqlState, func(t *testing.T) {
 			database := newTestDB(t)
-	var failures atomic.Int32
+			email := "retry-" + strings.ToLower(sqlState) + "@senlin.ai"
-	callbackName := "test:fail_first_seed_user_create"
+			var injected atomic.Bool
-	require.NoError(t, database.Callback().Create().Before("gorm:create").Register(callbackName, func(tx *gorm.DB) {
+			var sawProjectWrite atomic.Bool
-		if tx.Statement.Schema == nil || tx.Statement.Schema.Table != (models.SenlinAgentUser{}).TableName() {
+			var failedOwnerIdentity string
+			var failedProjectIdentity string
+			callbackName := "test:fail_first_seed_project_" + sqlState
+			require.NoError(t, database.Callback().Create().After("gorm:create").Register(callbackName, func(tx *gorm.DB) {
+				if tx.Error != nil || tx.Statement.Schema == nil || tx.Statement.Schema.Table != (models.SenlinAgentProject{}).TableName() {
 					return
 				}
-		if failures.Add(1) == 1 {
+				if !injected.CompareAndSwap(false, true) {
-			tx.AddError(testSQLStateError{state: "40001"})
+					return
 				}
+				project, ok := tx.Statement.Dest.(*models.SenlinAgentProject)
+				if !ok {
+					tx.AddError(fmt.Errorf("unexpected project create destination %T", tx.Statement.Dest))
+					return
+				}
+				if tx.RowsAffected == 1 && project.ID != 0 && project.Identity != "" && project.OwnerIdentity != "" {
+					sawProjectWrite.Store(true)
+					failedOwnerIdentity = project.OwnerIdentity
+					failedProjectIdentity = project.Identity
+				}
+				tx.AddError(testSQLStateError{state: sqlState})
 			}))
 			t.Cleanup(func() { database.Callback().Create().Remove(callbackName) })
 
-	result, err := Demo(database, DemoOptions{Email: "retry@senlin.ai", DisplayName: "重试用户", Password: "password123"})
+			result, err := Demo(database, DemoOptions{Email: email, DisplayName: "重试用户", Password: "password123"})
 
 			require.NoError(t, err)
-	require.Equal(t, int32(2), failures.Load())
+			require.True(t, injected.Load())
-	require.Equal(t, "retry@senlin.ai", result.User.Email)
+			require.True(t, sawProjectWrite.Load(), "failed transaction must contain the first inserted project")
-	var userCount int64
+			require.NotEqual(t, failedOwnerIdentity, result.User.Identity, "retry must recreate the rolled-back user")
-	require.NoError(t, database.Model(&models.SenlinAgentUser{}).Where("email = ?", result.User.Email).Count(&userCount).Error)
+			require.NotEqual(t, failedProjectIdentity, result.Projects[0].Identity, "retry must recreate the rolled-back project")
-	require.Equal(t, int64(1), userCount)
+			require.Equal(t, email, result.User.Email)
+			require.Len(t, result.Projects, 4)
+			projectIDs := []uint{result.Projects[0].ID, result.Projects[1].ID, result.Projects[2].ID, result.Projects[3].ID}
+			requireDemoModelCount(t, database, &models.SenlinAgentUser{}, "email = ?", []any{email}, 1)
+			requireDemoModelCount(t, database, &models.SenlinAgentProject{}, "owner_id = ?", []any{result.User.ID}, 4)
+			requireDemoModelCount(t, database, &models.SenlinAgentTag{}, "project_id = ?", []any{result.Projects[0].ID}, 4)
+			requireDemoModelCount(t, database, &models.SenlinAgentTask{}, "project_id IN ?", []any{projectIDs}, 6)
+			requireDemoModelCount(t, database, &models.SenlinAgentInboxItem{}, "project_id IN ?", []any{projectIDs}, 7)
+			requireDemoModelCount(t, database, &models.SenlinAgentAISession{}, "project_id = ?", []any{result.Projects[0].ID}, 4)
+			requireDemoModelCount(t, database, &models.SenlinAgentNote{}, "project_id = ?", []any{result.Projects[0].ID}, 2)
+			requireDemoModelCount(t, database, &models.SenlinAgentSource{}, "project_id = ?", []any{result.Projects[0].ID}, 2)
+			requireDemoModelCount(t, database, &models.SenlinAgentCronPlan{}, "project_id = ?", []any{result.Projects[0].ID}, 3)
+			requireDemoModelCount(t, database, &models.SenlinAgentProjectChannel{}, "project_id = ?", []any{result.Projects[0].ID}, 2)
+		})
+	}
+}
+
+func requireDemoModelCount(t *testing.T, database *gorm.DB, model any, where string, args []any, expected int64) {
+	t.Helper()
+	var count int64
+	require.NoError(t, database.Model(model).Where(where, args...).Count(&count).Error)
+	require.Equal(t, expected, count)
 }
 
 type testSQLStateError struct {