add some unittests and bug fix

redis/server/server_test.go

@@ -0,0 +1,42 @@
+package server
+
+import (
+	"bufio"
+	"github.com/hdt3213/godis/tcp"
+	"net"
+	"testing"
+)
+
+func TestListenAndServe(t *testing.T) {
+	var err error
+	closeChan := make(chan struct{})
+	listener, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	addr := listener.Addr().String()
+	go tcp.ListenAndServe(listener, MakeHandler(), closeChan)
+
+	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
+	}
+	closeChan <- struct{}{}
+}