feat(channels/qq_obv11): OneBot v11 渠道插件（正/反 WS 双模式 + CQ 媒体 + 限频，stdlib 自研 WS）

plugins/channels/qq_obv11/ratelimit_test.go

@@ -0,0 +1,67 @@
+package qq_obv11
+
+import (
+	"errors"
+	"testing"
+	"time"
+)
+
+func TestRateLimiterAllowWithinWindow(t *testing.T) {
+	t.Parallel()
+
+	rl := newRateLimiter(3, 10*time.Second)
+	now := time.Now()
+	for i := 0; i < 3; i++ {
+		if !rl.allow(now) {
+			t.Fatalf("allow #%d denied, want allowed", i)
+		}
+	}
+	if rl.allow(now) {
+		t.Error("4th allow in window accepted, want denied")
+	}
+}
+
+func TestRateLimiterDeniedOverWindow(t *testing.T) {
+	t.Parallel()
+
+	rl := newRateLimiter(2, 10*time.Second)
+	base := time.Now()
+	if !rl.allow(base) || !rl.allow(base) {
+		t.Fatal("first two sends should be allowed")
+	}
+	if rl.allow(base) {
+		t.Error("third send within window allowed, want denied")
+	}
+	// After the window elapses, the budget frees up.
+	if !rl.allow(base.Add(11 * time.Second)) {
+		t.Error("send after window elapsed denied, want allowed")
+	}
+}
+
+func TestRateLimiterDisabledAllowsAll(t *testing.T) {
+	t.Parallel()
+
+	rl := newRateLimiter(0, 10*time.Second)
+	for i := 0; i < 100; i++ {
+		if !rl.allow(time.Now()) {
+			t.Fatalf("disabled limiter denied send #%d", i)
+		}
+	}
+}
+
+func TestRateLimiterNilAllows(t *testing.T) {
+	t.Parallel()
+
+	var rl *rateLimiter
+	if !rl.allow(time.Now()) {
+		t.Error("nil limiter denied send, want allowed")
+	}
+}
+
+func TestErrRateLimitedSentinel(t *testing.T) {
+	t.Parallel()
+
+	if !errors.Is(ErrRateLimited, ErrRateLimited) {
+		t.Error("ErrRateLimited should be its own sentinel")
+	}
+}