Fixed a problem with handeling the unknown child exception

Author: paquettg

src/PHPHtmlParser/Dom/HtmlNode.php

@@ -1,7 +1,7 @@
 <?php
 namespace PHPHtmlParser\Dom;
 
-use PHPHtmlParser\Exceptions\UnkownChildTypeException;
+use PHPHtmlParser\Exceptions\UnknownChildTypeException;
 use PHPHtmlParser\Exceptions\ChildNotFoundException;
 
 class HtmlNode extends AbstractNode {

src/PHPHtmlParser/Exceptions/UnknownChildTypeException.php

@@ -1,4 +1,4 @@
 <?php
 namespace PHPHtmlParser\Exceptions;
 
-final class UnkownChildTypeException extends \Exception {}
+final class UnknownChildTypeException extends \Exception {}

tests/Node/HtmlTest.php

@@ -2,6 +2,7 @@
 
 use PHPHtmlParser\Dom\HtmlNode;
 use PHPHtmlParser\Dom\TextNode;
+use PHPHtmlParser\Dom\MockNode;
 use PHPHtmlParser\Dom\Tag;
 
 class NodeHtmlTest extends PHPUnit_Framework_TestCase {
@@ -65,6 +66,39 @@ public function testInnerHtmlTwice()
 		$this->assertEquals($inner, $parent->innerHtml());
 	}
 
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\UnknownChildTypeException
+	 */
+	public function testInnerHtmlUnkownChild()
+	{
+		$div = new Tag('div');
+		$div->setAttributes([
+			'class' => [
+				'value'       => 'all',
+				'doubleQuote' => true,
+			],
+		]);
+		$a = new Tag('a');
+		$a->setAttributes([
+			'href' => [
+				'value'       => 'http://google.com',
+				'doubleQuote' => false,
+			],
+		]);
+		$br = new Tag('br');
+		$br->selfClosing();
+
+		$parent  = new HtmlNode($div);
+		$childa  = new HtmlNode($a);
+		$childbr = new MockNode($br);
+		$parent->addChild($childa);
+		$parent->addChild($childbr);
+		$childa->addChild(new TextNode('link'));
+
+		$inner = $parent->innerHtml();
+		$this->assertEquals($inner, $parent->innerHtml());
+	}
+
 	public function testInnerHtmlMagic()
 	{
 		$parent  = new HtmlNode('div');