Patch test sample data to try

/* Copy-paste this to PATCH */
[
    [
        { "op": "test", "path": "/foo", "inverse" : true },
        { "op": "add", "path": "/foo", "value": [] }
    ],
    [
        { "op": "push", "path": "/food", "value": [ 4, 5, 6 ] }
    ]
]

/* And this to SOURCE DATA */
{
    "foo": [ 1, 2, 3 ]
}