Fix compile errors on macOS and add some tests

tests/cmd_test.go

@@ -0,0 +1,27 @@
+package tests
+
+import (
+	"hk4e/protocol/cmd"
+	"hk4e/protocol/proto"
+
+	"reflect"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCmd(t *testing.T) {
+	t.Log("TestCmd")
+	pbm := cmd.NewCmdProtoMap()
+	ping_req1 := pbm.GetProtoObjByCmdId(cmd.PingReq)
+	t1 := reflect.TypeOf(ping_req1)
+	t.Log(t1, t1.Elem(), t1.Elem().Name())
+	ping_req2 := new(proto.PingReq)
+	t2 := reflect.TypeOf(ping_req2)
+	t.Log(t2, t2.Elem(), t2.Elem().Name())
+	assert.Equal(t, t1.Elem().Name(), t2.Elem().Name())
+	assert.Equal(t, pbm.GetCmdNameByCmdId(cmd.PingReq), "PingReq")
+	assert.Equal(t, int(pbm.GetCmdIdByCmdName("PingReq")), cmd.PingReq)
+	assert.Equal(t, int(pbm.GetCmdIdByProtoObj(ping_req1)), cmd.PingReq)
+	assert.Equal(t, int(pbm.GetCmdIdByProtoObj(ping_req2)), cmd.PingReq)
+}