feat: 初始化小米 IoT (MIoT) 智能家居 Go 库

- 实现 MIoT 客户端核心功能（MQTT 连接、设备管理、属性读写）
- 支持云端 API 调用与局域网设备发现（mDNS）
- 集成国际化（i18n）多语言支持
- 添加 MIoT 设备规约解析器（spec_parser）
- 包含单元测试与使用示例

miot/miot_network_test.go

@@ -0,0 +1,106 @@
+// Package miot provides white-box tests for miot_network.go network monitor.
+package miot
+
+import (
+	"testing"
+	"time"
+)
+
+func TestInterfaceStatus_String(t *testing.T) {
+	tests := []struct {
+		status InterfaceStatus
+		want   string
+	}{
+		{InterfaceAdd, "add"},
+		{InterfaceUpdate, "update"},
+		{InterfaceRemove, "remove"},
+		{InterfaceStatus(99), "unknown"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.want, func(t *testing.T) {
+			if got := tt.status.String(); got != tt.want {
+				t.Errorf("InterfaceStatus(%d).String() = %q, want %q", tt.status, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestNetworkInfo_String(t *testing.T) {
+	info := &NetworkInfo{
+		Name: "eth0", IP: "192.168.1.100",
+		Netmask: "255.255.255.0", NetSeg: "192.168.1.0",
+	}
+	s := info.String()
+	if s != "eth0: 192.168.1.100/255.255.255.0 (192.168.1.0)" {
+		t.Errorf("NetworkInfo.String() = %q", s)
+	}
+}
+
+func TestNewMIoTNetwork_Defaults(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	if n == nil {
+		t.Fatal("NewMIoTNetwork returned nil")
+	}
+}
+
+func TestNewMIoTNetwork_CustomInterval(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 15*time.Second)
+	if n == nil {
+		t.Fatal("NewMIoTNetwork returned nil")
+	}
+}
+
+func TestNewMIoTNetwork_CustomAddresses(t *testing.T) {
+	n := NewMIoTNetwork([]string{"1.1.1.1", "2.2.2.2"}, []string{"http://example.com"}, 60*time.Second)
+	if n == nil {
+		t.Fatal("NewMIoTNetwork returned nil")
+	}
+}
+
+func TestGetNetworkStatus_InitiallyFalse(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	if n.GetNetworkStatus() {
+		t.Error("network status should be false initially")
+	}
+}
+
+func TestGetNetworkInfo_InitiallyEmpty(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	info := n.GetNetworkInfo()
+	if info == nil {
+		t.Error("GetNetworkInfo should not return nil")
+	}
+}
+
+func TestSubUnsubNetworkStatus(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	called := false
+	n.SubNetworkStatus("test_key", func(status bool) { called = true })
+	n.UnsubNetworkStatus("test_key")
+	_ = called
+}
+
+func TestSubUnsubNetworkInfo(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	called := false
+	n.SubNetworkInfo("test_key", func(status InterfaceStatus, info *NetworkInfo) { called = true })
+	n.UnsubNetworkInfo("test_key")
+	_ = called
+}
+
+func TestUpdateAddrList(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	n.UpdateAddrList([]string{"1.1.1.1"}, []string{"http://test.com"})
+}
+
+func TestUpdateAddrList_Nil(t *testing.T) {
+	n := NewMIoTNetwork(nil, nil, 0)
+	n.UpdateAddrList(nil, nil)
+}
+
+func TestNetworkInfo_Fields(t *testing.T) {
+	info := &NetworkInfo{Name: "wlan0", IP: "10.0.0.1", Netmask: "255.0.0.0", NetSeg: "10.0.0.0"}
+	if info.Name != "wlan0" {
+		t.Errorf("Name = %q", info.Name)
+	}
+}