feat(tests): add TestTransportLeak to check for goroutine leaks in transport instances

pkg/transport/leak_test.go

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: 0BSD
+// Copyright (c) 2024-2026 Sudo-Ivan / Quad4.io
+package transport
+
+import (
+	"runtime"
+	"testing"
+	"time"
+
+	"git.quad4.io/Networks/Reticulum-Go/pkg/common"
+)
+
+func TestTransportLeak(t *testing.T) {
+	// Baseline goroutine count
+	runtime.GC()
+	baseline := runtime.NumGoroutine()
+
+	cfg := &common.ReticulumConfig{}
+	
+	// Create and close many transport instances
+	for i := 0; i < 100; i++ {
+		tr := NewTransport(cfg)
+		// Give it a tiny bit of time to start the goroutine
+		time.Sleep(1 * time.Millisecond)
+		tr.Close()
+	}
+
+	// Wait for goroutines to finish
+	time.Sleep(100 * time.Millisecond)
+	runtime.GC()
+	
+	final := runtime.NumGoroutine()
+	
+	// We allow a small margin for other system goroutines, 
+	// but 100 leaks would be very obvious.
+	if final > baseline+5 {
+		t.Errorf("Potential goroutine leak: baseline %d, final %d", baseline, final)
+	}
+}
+