``` @Test fun testCategories(){ val parent...

# tornadofx

[ron]

@Test fun testCategories(){
        val parent = PhotoCategory("top");
        parent.children.add(PhotoCategory("child 1"))
        parent.children[0].children.add(PhotoCategory("child 1.1"))
        parent.children.add(PhotoCategory("child 2"))

        println(parent)

        val builder = JsonBuilder()
        parent.toJSON(builder)
        println(builder.build().toPrettyString())
    }