Chai plugin for XML validation using libxml-xsd

Chai plugin to allow XML Schemas (XSD) to be used with expect.
This is currently a stub and is under heavy development.
All contributions are welcome.

##Installation

To install plugin simply run:
npm install chai-xsd-schema

Then add the following to your unit tests under your chai definition:

``javascript
chai.use(require('chai-xsd-schema'))
`


##Usage
This plugin adds validWithSchema to the expect validation methods.
`javascript
expect('xmldocstring').to.be.validXML(['xsdschemastring1','xsdschemastring2']);
expect('xmldocstring').to.be.validXML('xsdschemastring');
`

##Simple Example
`javascript
import chai from 'chai';
import fs from 'fs';

chai.use(require('chai-xsd-schema'))

const expect = chai.expect;

describe('Test XML', () => {
it('Fails with invalid input and valid schema', () => {
const schema = fs.readFileSync(${__dirname}/schemas/dhl.xsd, {
encoding: 'utf8',
});

const xml = fs.readFileSync(${__dirname}/vectors/invalidData.xml, {
encoding: 'utf8',
});

expect(xml).to.not.be.validXML(schema);
});

it('Passes with valid input and valid schema', () => {
const schema = fs.readFileSync(${__dirname}/schemas/dhl.xsd, {
encoding: 'utf8',
});

const xml = fs.readFileSync(${__dirname}/vectors/validData.xml, {
encoding: 'utf8',
});

expect(xml).to.be.validXML(schema);
});
});

``