How can schema validation be performed on a multi-level nested array for Karate?

edit

To perform schema validation on a multi-level nested array in Karate, you can use the match keyword along with the JSON schema. Here is an example:

* def data =
"""
[
  {
    "id": 1,
    "name": "John",
    "grades": [
      {
        "subject": "Math",
        "score": 90
      },
      {
        "subject": "Science",
        "score": 80
      }
    ]
  },
  {
    "id": 2,
    "name": "Alice",
    "grades": [
      {
        "subject": "Math",
        "score": 85
      },
      {
        "subject": "Science",
        "score": 95
      }
    ]
  }
]
"""

* def schema =
"""
{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "array",
  "items": {
    "type": "object",
    "properties": {
      "id": {"type": "integer"},
      "name": {"type": "string"},
      "grades": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "subject": {"type": "string"},
            "score": {"type": "integer"}
          },
          "required": ["subject", "score"]
        }
      }
    },
    "required": ["id", "name", "grades"]
  }
}
"""

* match data == schema

In this example, we have a multi-level nested array of students and their grades. The data is saved in the data variable and the JSON schema is saved in the schema variable. We then use the match keyword to compare data with schema, which performs the schema validation on the multi-level nested array.