.

go/zodb/persistent.go

@@ -432,8 +432,8 @@ func newGhost(class string, oid Oid, jar *Connection) IPersistent {
 	return base.instance
 }
 
-// Broken objects are used to represent ZODB objects with classes that were not
-// registered to zodb Go package.
+// Broken objects are used to represent loaded ZODB objects with classes that
+// were not registered to zodb Go package.
 //
 // See RegisterClass for details.
 type Broken struct {

go/zodb/persistent_test.go

@@ -23,8 +23,11 @@ import (
 	"fmt"
 	"reflect"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
+// test Persistent type.
 type MyObject struct {
 	Persistent
 
@@ -52,8 +55,47 @@ func init() {
 	RegisterClass("t.zodb.MyObject", t(MyObject{}), t(myObjectState{}))
 }
 
+func TestPersistent(t *testing.T) {
+	assert := require.New(t)
 
+	xobj := newGhost("t.zodb.MyObject", 11, nil)
 
-func TestPersistent(t *testing.T) {
-	// XXX
+	obj, ok := xobj.(*MyObject)
+	if !ok {
+		t.Fatalf("unknown -> %T;  want Broken", xobj)
+	}
+
+	// XXX .zclass ?
+	assert.Equal(obj.jar, nil)
+	assert.Equal(obj.oid, 11)
+	assert.Equal(obj.serial, 0)
+	assert.Equal(obj.state, GHOST)
+	assert.Equal(obj.refcnt, 0)
+	assert.Equal(obj.instance, obj)
+	assert.Equal(obj.loading, nil)
+}
+
+// XXX reenable
+func _TestBroken(t *testing.T) {
+	assert := require.New(t)
+
+	// unknown type -> Broken
+	xobj := newGhost("t.unknown", 11, nil)
+
+	obj, ok := xobj.(*Broken)
+	if !ok {
+		t.Fatalf("unknown -> %T;  want Broken", xobj)
+	}
+
+	// XXX .zclass ?
+	assert.Equal(obj.class, "t.unknown")
+	assert.Equal(obj.state, nil)
+
+	assert.Equal(obj.jar, nil)
+	assert.Equal(obj.oid, 11)
+	assert.Equal(obj.serial, 0)
+	assert.Equal(obj.state, GHOST)
+	assert.Equal(obj.refcnt, 0)
+	assert.Equal(obj.instance, obj)
+	assert.Equal(obj.loading, nil)
 }