test.json

[
  {
    "invoice": "12345",
    "date": "2019-01-01",
    "customer": "John Doe",
    "items": [
      {
        "product": "apple",
        "price": 1.00,
        "quantity": 10
      },
      {
        "product": "banana",
        "price": 0.50,
        "quantity": 20
      },
      {
        "product": "cherry",
        "price": 0.25,
        "quantity": 30
      }
    ]
  }
]