Feat: UDP 框架

cmd/internal/peer/udp_client_test.go

@@ -0,0 +1,211 @@
+package peer
+
+import (
+	"net"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"omnisocketgo/cmd/internal/protocol"
+	"omnisocketgo/cmd/internal/server"
+	"omnisocketgo/cmd/internal/transport"
+)
+
+// TestUDPDialAndSendText 验证 UDP 客户端可以成功连接、注册并发送文本消息。
+func TestUDPDialAndSendText(t *testing.T) {
+	hubAddr := startUDPTestHub(t)
+
+	clientA, err := DialUDP(hubAddr.String(), "peer-a")
+	if err != nil {
+		t.Fatalf("DialUDP(peer-a) error = %v", err)
+	}
+	defer clientA.Close()
+
+	clientB, err := DialUDP(hubAddr.String(), "peer-b")
+	if err != nil {
+		t.Fatalf("DialUDP(peer-b) error = %v", err)
+	}
+	defer clientB.Close()
+
+	// 等待注册被处理
+	time.Sleep(50 * time.Millisecond)
+
+	// peer-a 发送文本给 peer-b
+	if err := clientA.SendText("peer-b", "hello from udp"); err != nil {
+		t.Fatalf("SendText() error = %v", err)
+	}
+
+	// peer-b 接收
+	msg := receiveUDPClientMessage(t, clientB)
+	if msg.Type != protocol.MessageTypeText {
+		t.Fatalf("message type = %s, want text", msg.Type)
+	}
+	if string(msg.Body) != "hello from udp" {
+		t.Fatalf("message body = %q, want %q", string(msg.Body), "hello from udp")
+	}
+}
+
+// TestUDPClientID 验证 ID() 返回正确的 peer 标识。
+func TestUDPClientID(t *testing.T) {
+	hubAddr := startUDPTestHub(t)
+
+	client, err := DialUDP(hubAddr.String(), "my-peer-id")
+	if err != nil {
+		t.Fatalf("DialUDP() error = %v", err)
+	}
+	defer client.Close()
+
+	if got := client.ID(); got != "my-peer-id" {
+		t.Fatalf("ID() = %q, want %q", got, "my-peer-id")
+	}
+}
+
+// TestUDPClientPersistMessage 验证 UDP 客户端可以将消息持久化到磁盘。
+func TestUDPClientPersistMessage(t *testing.T) {
+	hubAddr := startUDPTestHub(t)
+
+	client, err := DialUDP(hubAddr.String(), "peer-persist")
+	if err != nil {
+		t.Fatalf("DialUDP() error = %v", err)
+	}
+	defer client.Close()
+
+	inboxDir := t.TempDir()
+
+	// 持久化文本消息
+	textMsg := protocol.Message{
+		Type: protocol.MessageTypeText,
+		ID:   1,
+		From: "sender",
+		To:   "peer-persist",
+		Body: []byte("persisted text"),
+	}
+
+	path, err := client.PersistMessage(textMsg, inboxDir)
+	if err != nil {
+		t.Fatalf("PersistMessage(text) error = %v", err)
+	}
+	if !filepath.IsAbs(path) && path == "" {
+		t.Fatalf("PersistMessage(text) returned empty path")
+	}
+
+	// 持久化文件消息
+	fileMsg := protocol.Message{
+		Type:     protocol.MessageTypeFile,
+		ID:       2,
+		From:     "sender",
+		To:       "peer-persist",
+		FileName: "test.bin",
+		Body:     []byte{0x01, 0x02, 0x03},
+	}
+
+	filePath, err := client.PersistMessage(fileMsg, inboxDir)
+	if err != nil {
+		t.Fatalf("PersistMessage(file) error = %v", err)
+	}
+
+	content, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("ReadFile(%s) error = %v", filePath, err)
+	}
+	if len(content) != 3 || content[0] != 0x01 {
+		t.Fatalf("file content mismatch: got %v", content)
+	}
+}
+
+// TestUDPClientSendFile 验证 UDP 客户端可以发送文件消息。
+func TestUDPClientSendFile(t *testing.T) {
+	hubAddr := startUDPTestHub(t)
+
+	clientA, err := DialUDP(hubAddr.String(), "peer-a")
+	if err != nil {
+		t.Fatalf("DialUDP(peer-a) error = %v", err)
+	}
+	defer clientA.Close()
+
+	clientB, err := DialUDP(hubAddr.String(), "peer-b")
+	if err != nil {
+		t.Fatalf("DialUDP(peer-b) error = %v", err)
+	}
+	defer clientB.Close()
+
+	time.Sleep(50 * time.Millisecond)
+
+	fileBody := []byte{0xDE, 0xAD, 0xBE, 0xEF}
+	if err := clientA.SendFile("peer-b", "test.bin", fileBody); err != nil {
+		t.Fatalf("SendFile() error = %v", err)
+	}
+
+	msg := receiveUDPClientMessage(t, clientB)
+	if msg.Type != protocol.MessageTypeFile {
+		t.Fatalf("message type = %s, want file", msg.Type)
+	}
+	if msg.FileName != "test.bin" {
+		t.Fatalf("file name = %q, want %q", msg.FileName, "test.bin")
+	}
+	if len(msg.Body) != 4 {
+		t.Fatalf("body length = %d, want 4", len(msg.Body))
+	}
+}
+
+// startUDPTestHub 创建并启动一个测试用 UDPHub。
+func startUDPTestHub(t *testing.T) *net.UDPAddr {
+	t.Helper()
+
+	addr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("ResolveUDPAddr() error = %v", err)
+	}
+
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		t.Fatalf("ListenUDP() error = %v", err)
+	}
+
+	hub, err := server.NewUDPHub(conn)
+	if err != nil {
+		_ = conn.Close()
+		t.Fatalf("NewUDPHub() error = %v", err)
+	}
+
+	go func() {
+		_ = hub.Serve()
+	}()
+
+	t.Cleanup(func() {
+		_ = hub.Close()
+	})
+
+	return conn.LocalAddr().(*net.UDPAddr)
+}
+
+// receiveUDPClientMessage 从 UDP 客户端接收一条消息，带超时。
+func receiveUDPClientMessage(t *testing.T, client *UDPClient) protocol.Message {
+	t.Helper()
+
+	type result struct {
+		msg protocol.Message
+		err error
+	}
+
+	ch := make(chan result, 1)
+	go func() {
+		msg, err := client.Receive()
+		ch <- result{msg: msg, err: err}
+	}()
+
+	select {
+	case r := <-ch:
+		if r.err != nil {
+			t.Fatalf("Receive() error = %v", r.err)
+		}
+		return r.msg
+	case <-time.After(2 * time.Second):
+		t.Fatal("Receive() timed out after 2s")
+		return protocol.Message{}
+	}
+}
+
+// Ensure transport package is used (needed for WithTXTimestampDebugLogger option).
+var _ transport.TXTimestampDebugLogger = nil