json-assert

JSON Assert

This program checks that a javascript object matches another. The main use case is for use in testing a JSON API.

The difference between this and _.isEqual is that json-assert accepts a function which will run that can perform addition checks. See the examples below.

The difference between this and JSON schema is that json-assert is less verbose, but it is also less flexible.

Installation

npm install json-assert --save

Tests

npm test

Usage

var ja = require('json-assert');

// basic things must match
ja.isEqual({ a: 3}, { b: 4}); // false
ja.isEqual({ a: 3}, { a: 3}); // true

// we don't care what the value is as long as it exists.
ja.isEqual({ a: ja.dontCare }, { a: 3}); // true

// it must exist and match the type (typeof)
ja.isEqual({ a: ja.matchType('string') }, { a: 4}); // false
ja.isEqual({ a: ja.matchType('string') }, { a: "4"}); // true

// we don't care if it exists or not
ja.isEqual({ a: ja.optional }, { a: 4 }); // true
ja.isEqual({ a: ja.optional }, { }); // true

Here is a more realistic example.

var ja = require('json-assert');
var request = require('request');

function testAjax(url, expected) {
  request(url, function (error, response, body) {
    assert(!error);
    assert.equal(response.statusCode, 200);
    assert(ja.isEqual(expected, JSON.parse(body)));
  });
}

testAjax('http://api.test.com', {
  name: "bob",
  age: 45,
  lastLogin: ja.matchType('string')
});

Contributing

Make sure your code:

• has been run through js beautifier
• passes js hint
• has tests written for all new code
• that all tests pass

Then submit a pull request.