Checking single properties

Given the sample data set below, we want to check if the price of the book with the title The Lord of the Rings is greater than 10.

{
  "store": {
    "book": [
      {
        "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95,
        "tags": ["book", "Rees", "reference", "Sayings"]
      },
      {
        "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99,
        "tags": ["book", "Waugh", "fiction", "Sword"]
      },
      {
        "category": "fiction",
        "author": "Herman Melville",
        "title": "Moby Dick",
        "isbn": "0-553-21311-3",
        "price": 8.99,
        "tags": ["book", "Melville", "fiction", "Moby"]
      },
      {
        "category": "fiction",
        "author": "J. R. R. Tolkien",
        "title": "The Lord of the Rings",
        "isbn": "0-395-19395-8",
        "price": 22.99,
        "tags": []
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 19.95
    }
  }
}

Steps:

1. Define a ref that returns the object you are interested in. In this case we want to check the price of the book with the title The Lord of the Rings, so we can use $.store.book[?(@.title == 'The Lord of the Rings')] as ref.

   Note

   You can use the jsonPath online evaluator to check your jsonPath syntax.

2. Define a condition that checks the price of the book. In this case we can use $.price > 10 as condition.

   Note

   Of course you can also use other operators like ===, !==, <, <= or >=.

Your config file then looks like this:

checks:
  - name: lotr_price_greater_than_10
    ref: $.store.book[?(@.title == 'The Lord of the Rings')]
    condition: $.price > 10

For the example data set above, the result of this check would be: GREEN.