data-checker

Checks JSON data for required fields and data types. For REST and other data services testing. For example, model:

``
{
a: "number",
b: "string",
c: "boolean"
}
`

will return two errors for object below (incorrect type a and missing field c):

`
{
a: "I'm a string but should be a number!",
b: "whee"
}
`

Example

Better check tests/index.js for example.

`
var dataChecker = require( 'data-checker' ),
data = // get your data by HTTP request
model = require( './model' );

dataChecker.check( data, model, { callback: callback } );
`

Methods

$3

data: anything that your service returns. Example.

model {Object}: Object with required fields and types for data. Example.

options {Object}: Optional. Object with callback, assert and action methods.

#### options.callback( err, result ) {Function}

Called when data-checker finished the check.

err: null or {Array} with errors

result: {Object}. { total: {Number}, passed: {Number}, errors: {Array} }

#### options.assert( isSameType, errorMsg ) {Function}

Called in action if action is not overwritten, gets type check result and error message.

Example:

`
function assert( isSameType, errorMsg ) {
var assert = require( 'assert' );

assert.ok( isSameType, errorMsg );
}
``

#### options.action( fieldFromData, typeFromModel, options ) {Function}

Called when types check is required.