refactor code structure for gnet

redis/server/gnet/server_test.go

@@ -0,0 +1,45 @@
+package gnet
+
+import (
+	"bufio"
+	"net"
+	"testing"
+
+	"github.com/hdt3213/godis/database"
+)
+
+func TestListenAndServe(t *testing.T) {
+	var err error
+	listener, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	addr := listener.Addr().String()
+	db := database.NewStandaloneServer()
+	server := NewGnetServer(db)
+	go server.Run(addr)
+
+	conn, err := net.Dial("tcp", addr)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	_, err = conn.Write([]byte("PING\r\n"))
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	bufReader := bufio.NewReader(conn)
+	line, _, err := bufReader.ReadLine()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if string(line) != "+PONG" {
+		t.Error("get wrong response")
+		return
+	}
+	conn.Close()
+	server.Close()
+}