/**
 * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */

/* globals window */

import XmlDataProcessor from '../../src/dataprocessor/xmldataprocessor';
import xssTemplates from '../../tests/dataprocessor/_utils/xsstemplates';
import ViewDocumentFragment from '../../src/view/documentfragment';
import ViewDocument from '../../src/view/document';
import { stringify, parse } from '../../src/dev-utils/view';
import { StylesProcessor } from '../../src/view/stylesmap';

describe( 'XmlDataProcessor', () => {
	let dataProcessor, viewDocument;

	beforeEach( () => {
		viewDocument = new ViewDocument( new StylesProcessor() );
		dataProcessor = new XmlDataProcessor( viewDocument );
	} );

	describe( 'toView', () => {
		it( 'should return empty DocumentFragment when empty string is passed', () => {
			const fragment = dataProcessor.toView( '' );
			expect( fragment ).to.be.an.instanceOf( ViewDocumentFragment );
			expect( fragment.childCount ).to.equal( 0 );
		} );

		it( 'should convert XML to DocumentFragment with single text node', () => {
			const fragment = dataProcessor.toView( 'foo bar' );

			expect( stringify( fragment ) ).to.equal( 'foo bar' );
		} );

		it( 'should convert HTML to DocumentFragment with multiple child nodes', () => {
			const fragment = dataProcessor.toView( '<p>foo</p><p>bar</p>' );

			expect( stringify( fragment ) ).to.equal( '<p>foo</p><p>bar</p>' );
		} );

		it( 'should not add any additional nodes', () => {
			const fragment = dataProcessor.toView( 'foo <b>bar</b> text' );

			expect( stringify( fragment ) ).to.equal( 'foo <b>bar</b> text' );
		} );

		it( 'should allow to use registered namespaces', () => {
			dataProcessor = new XmlDataProcessor( viewDocument, {
				namespaces: [ 'foo', 'bar' ]
			} );

			const fragment = dataProcessor.toView( '<foo:a><bar:b></bar:b></foo:a><bar:b><foo:a></foo:a></bar:b>' );

			expect( stringify( fragment ) ).to.equal( '<foo:a><bar:b></bar:b></foo:a><bar:b><foo:a></foo:a></bar:b>' );
		} );

		it( 'should throw an error when use not registered namespaces', () => {
			expect( () => {
				dataProcessor.toView( '<foo:a></foo:a>' );
			} ).to.throw( Error, /Parse error/ );
		} );

		it( 'should thrown an error when markup is invalid', () => {
			expect( () => {
				dataProcessor.toView( '<b>missing closing tag' );
			} ).to.throw( Error, /Parse error/ );
		} );

		// Test against XSS attacks.
		for ( const name in xssTemplates ) {
			const input = xssTemplates[ name ].replace( /%xss%/g, 'testXss()' );

			it( 'should prevent XSS attacks: ' + name, done => {
				window.testXss = sinon.spy();
				dataProcessor.toView( input );

				window.setTimeout( () => {
					sinon.assert.notCalled( window.testXss );
					done();
				}, 10 );
			} );
		}
	} );

	describe( 'toData', () => {
		it( 'should return empty string when empty DocumentFragment is passed', () => {
			const fragment = new ViewDocumentFragment( viewDocument );

			expect( dataProcessor.toData( fragment ) ).to.equal( '' );
		} );

		it( 'should return text if document fragment with single text node is passed', () => {
			const fragment = new ViewDocumentFragment( viewDocument );
			fragment._appendChild( parse( 'foo bar' ) );

			expect( dataProcessor.toData( fragment ) ).to.equal( 'foo bar' );
		} );

		it( 'should convert HTML to DocumentFragment with multiple child nodes', () => {
			const fragment = parse( '<p>foo</p><p>bar</p>' );

			expect( dataProcessor.toData( fragment ) ).to.equal( '<p>foo</p><p>bar</p>' );
		} );
	} );
} );
