fix: 完成 broker 复审 B-03 至 B-12

每连接异步下发与背压、写出后断开、校验当前连接与订阅、生命周期串行、登录条件更新、闲置按在线计、认证超时并发与 Shutdown 0x8B。

internal/broker/b02_large_test.go

@@ -3,6 +3,7 @@ package broker
 import (
 	"bytes"
 	"context"
+	"errors"
 	"io"
 	"net"
 	"sync"
@@ -81,7 +82,16 @@ func TestLargeFrameQuotaReleasedOnDisconnect(t *testing.T) {
 		t.Fatal(err)
 	}
 	cancel()
-	if len(b.largeSem) == 0 {
+	held := false
+	deadline := time.Now().Add(2 * time.Second)
+	for time.Now().Before(deadline) {
+		if len(b.largeSem) > 0 {
+			held = true
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	if !held {
 		t.Fatal("expected a held large slot before disconnect")
 	}
 	_ = w.Close()
@@ -90,7 +100,7 @@ func TestLargeFrameQuotaReleasedOnDisconnect(t *testing.T) {
 	case <-time.After(3 * time.Second):
 		t.Fatal("client attach did not return")
 	}
-	deadline := time.Now().Add(2 * time.Second)
+	deadline = time.Now().Add(2 * time.Second)
 	for time.Now().Before(deadline) {
 		if len(b.largeSem) == 0 {
 			return
@@ -119,11 +129,11 @@ func TestLargeFrameQuotaReleasedWithoutSubscriber(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
 	err := b.PublishDown(ctx, "ep-large-nosub", "", payload, port.PublishOpts{QoS: 1})
 	cancel()
-	if err != nil {
-		t.Fatal(err)
+	if !errors.Is(err, ErrNotSubscribed) {
+		t.Fatalf("err=%v want ErrNotSubscribed", err)
 	}
-	if n := len(b.largeSem); n != 0 {
-		t.Fatalf("held slots without subscriber: %d", n)
+	if len(b.largeSem) != 0 {
+		t.Fatalf("held slots without subscriber: %d", len(b.largeSem))
 	}
 }