diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..d1509b3
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"biukop/sfm/loan"
+	"encoding/gob"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+type ABC struct {
+	TEST string
+	ABC  int
+	AB   []byte
+}
+
+func TestSession_SaveOtherType(t *testing.T) {
+	gob.Register(ABC{})
+
+	se := loan.Session{}
+	se.FakeNew()
+	e := se.Write()
+	assert.Equal(t, e, nil, "dbWrite should be ok")
+
+	se1 := loan.Session{}
+	e = se1.Read(se.Id)
+	assert.Equal(t, e, nil, "dbRead should success")
+	assert.Equal(t, se, se1, "two structure should be equal")
+
+	//random struct
+	p := ABC{}
+	p.TEST = "this is TEST"
+	p.ABC = 123
+	p.AB = []byte("000111222333444555666777888999")
+
+	//save to db
+	se.Add("people", p)
+	e = se.Write()
+	assert.Equal(t, e, nil, "dbWrite Bin struct")
+
+	//read it back
+	e = se1.Read(se.Id)
+	assert.Equal(t, e, nil, "dbRead read Bin")
+
+	//unpack Bin
+	p1 := se1.Get("people")
+	assert.Equal(t, e, nil, "UnMarshal bin")
+
+	//the Bin should be the same
+	assert.Equal(t, p, p1, "two structure should be the same")
+
+}