var assert = require('assert');

var snabbdom = require('../snabbdom');
var h = require('../h').default;
var patch = snabbdom.init([
  require('../modules/attributes').default
]);

describe('svg', function () {
 var elm, vnode0;
 beforeEach(function() {
   elm = document.createElement('svg');
   vnode0 = elm;
 });

 it('removes child svg elements', function(){
   var a = h('svg', {}, [
    h('g'),
    h('g')
   ]);
   var b = h('svg', {}, [
    h('g')
   ]);
   var result = patch(patch(vnode0, a), b).elm;
   assert.equal(result.childNodes.length, 1); 
 });

 it('adds correctly xlink namespaced attribute', function(){
   var xlinkNS = 'http://www.w3.org/1999/xlink';
   var testUrl = '/test';
   var a = h('svg', {}, [
     h('use', {
       attrs: { 'xlink:href': testUrl }
     }, [])
   ]);

   var result = patch(vnode0, a).elm;
   assert.equal(result.childNodes.length, 1);
   assert.equal(result.childNodes[0].getAttribute('xlink:href'), testUrl); 
   assert.equal(result.childNodes[0].getAttributeNS(xlinkNS,'href'), testUrl);

 });

 it('adds correctly xml namespaced attribute', function(){
   var xmlNS = 'http://www.w3.org/XML/1998/namespace';
   var testAttrValue = 'und';
   var a = h('svg', { attrs: { 'xml:lang': testAttrValue } }, []);

   var result = patch(vnode0, a).elm;
   assert.equal(result.getAttributeNS(xmlNS, 'lang'), testAttrValue);
   assert.equal(result.getAttribute('xml:lang'), testAttrValue); 
 });
})