add test

d2graph/d2graph.go

@@ -574,6 +574,7 @@ func (obj *Object) newObject(id string) *Object {
 
 func (obj *Object) HasChild(ids []string) (*Object, bool) {
 	if len(ids) == 0 {
+		println("\033[1;31m--- DEBUG:", "=======================", "\033[m")
 		return obj, true
 	}
 	if len(ids) == 1 && ids[0] != "style" {

d2oracle/edit_test.go

@@ -3526,6 +3526,29 @@ func TestDelete(t *testing.T) {
 			key: `x`,
 
 			exp: `x.y.z -> y.b
+`,
+		},
+		{
+			name: "duplicate_generated",
+
+			text: `x
+x 2
+x 3: {
+  x 3
+  x 4
+}
+x 4
+y
+`,
+			key: `x 3`,
+			exp: `x
+x 2
+
+x 3
+x 5
+
+x 4
+y
 `,
 		},
 		{