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icedfrisby-jsonrefchecks

v0.4.1

Published

IcedFrisby plugin to check referential integrity between different sections of an API response

Downloads

11

Readme

icedfrisby-jsonrefchecks

IcedFrisby plugin to check referential integrity between different sections of an API response

Usage

Pass two jsonpath specifications, a list of candidates (1) that must exist in the list of references (2)

.expectJSONRefDataExists(candidates, references, [options])

Purpose

Where a JSON response to an API request contains internal references, you may wish to validate them.

{
  "things": [
    {
      "id": "00fb60c7-520e-4228-96c7-13a1f7a82749",
      "name": "Thing 1",
      "url": "https://lolagons.com"
    },
    {
      "id": "709b85a3-98be-4c02-85a5-e3f007ce4bbf",
      "name": "Thing 2",
      "url": "https://lolfacts.com"
    },
    ...
  ],
  "layouts": {
    "sections": [
       {
          "id": "34f10988-bb3d-4c38-86ce-ed819cb6daee",
          "name": "Section 1",
          "content:" [
             {
               "id": "00fb60c7-520e-4228-96c7-13a1f7a82749" //This is a ref to Thing 1
             }
          ]
       },
       ...
     ]
  }
}

Here, things is the reference set, and content contains references to things. We need to validate that all content exists within things.

Example

For the above JSON:

const { mix } = require('mixwith')
const frisby = mix(require('icedfrisby')).with(require('icedfrisby-jsonrefchecks'))

frisby.create('Example Referential Integrity Check')
    .get('http://example.com/lol')
    .expectJSONRefDataExists('layouts.sections[*].content[*].id', 'things[*].id')
.toss();

This is a simple example containing only objects and arrays, but jsonpath supports lots of the features of XPath, and can query on a whole host of things, including data, existence of properties, those of parents/children, and combinations of all of them.

Options

Options is an object that contain any of these properties:

  • debug - When true, print the count of results from the candidate and reference jsonpath queries. Default: false.
  • failOnZeroCandidates - When true, fail the check if the candidate jsonpath query returns 0 results. This is useful for development and where data should exist, since 100% of 0 candidates will always appear in the references set. Default: false.

Further reading

jsonpath - https://www.npmjs.com/package/jsonpath