{
  "tests": [
    {
      "input": {
        "cart": {
          "items": [
            {
              "name": "Apple",
              "price": 0.5,
              "quantity": 3
            },
            {
              "name": "Banana",
              "price": 0.3,
              "quantity": 5
            },
            {
              "name": "Orange",
              "price": 0.7,
              "quantity": 2
            }
          ],
          "customerId": "CUST-001"
        }
      },
      "output": {
        "cart": {
          "items": [
            {
              "name": "Apple",
              "price": 0.5,
              "quantity": 3,
              "totalPrice": 1.5
            },
            {
              "name": "Banana",
              "price": 0.3,
              "quantity": 5,
              "totalPrice": 1.5
            },
            {
              "name": "Orange",
              "price": 0.7,
              "quantity": 2,
              "totalPrice": 1.4
            }
          ],
          "customerId": "CUST-001"
        }
      }
    }
  ],
  "nodes": [
    {
      "type": "inputNode",
      "id": "input-node",
      "name": "request",
      "position": {
        "x": 100,
        "y": 100
      }
    },
    {
      "type": "expressionNode",
      "id": "expression-node-1",
      "name": "calculateItemTotal",
      "position": {
        "x": 300,
        "y": 100
      },
      "content": {
        "inputField": "cart.items",
        "outputPath": "cart.items",
        "executionMode": "loop",
        "expressions": [
          {
            "id": "total-price-exp",
            "key": "totalPrice",
            "value": "price * quantity"
          }
        ],
        "passThrough": true
      }
    }
  ],
  "edges": [
    {
      "id": "edge-1",
      "sourceId": "input-node",
      "targetId": "expression-node-1",
      "type": "edge"
    }
  ]
}