fix(server):add test file

go.mod

@@ -17,6 +17,7 @@ require (
 	github.com/sirupsen/logrus v1.4.2
 	github.com/spf13/pflag v1.0.3
 	github.com/spf13/viper v1.7.1
+	github.com/stretchr/testify v1.6.1
 	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a
 	gorm.io/driver/mysql v1.0.3
 	gorm.io/driver/sqlite v1.1.4

server/utils/util_test.go

@@ -0,0 +1,28 @@
+package utils_test
+
+import (
+	"net"
+	"testing"
+
+	"next-terminal/server/utils"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTcping(t *testing.T) {
+	localhost4 := "127.0.0.1"
+	localhost6 := "::1"
+	conn, err := net.Listen("tcp", ":9999")
+	assert.NoError(t, err)
+	ip4resfalse := utils.Tcping(localhost4, 22)
+	assert.Equal(t, false, ip4resfalse)
+
+	ip4res := utils.Tcping(localhost4, 9999)
+	assert.Equal(t, true, ip4res)
+
+	ip6res := utils.Tcping(localhost6, 9999)
+	assert.Equal(t, true, ip6res)
+	defer func() {
+		conn.Close()
+	}()
+}