Abstracted the Node class as it should have been done in the first place

Author: paquettg

src/PHPHtmlParser/Dom/MockNode.php

@@ -0,0 +1,20 @@
+<?php
+namespace PHPHtmlParser\Dom;
+
+/**
+ * This mock object is used solely for testing the abstract
+ * class Node with out any potential side effects caused
+ * by testing a supperclass of Node.
+ *
+ * This object is not to be used for any other reason.
+ */
+class MockNode extends Node {
+
+	public function innerHtml() {}
+
+	public function outerHtml() {}
+
+	public function text() {}
+
+	protected function clear() {}
+}

src/PHPHtmlParser/Dom/Node.php

@@ -7,7 +7,7 @@
 /**
  * Dom node object.
  */
-class Node {
+abstract class Node {
 
 	/**
 	 * Contains the tag name/type
@@ -621,9 +621,33 @@ public function get_display_size()
         return $result;
     }
 
+	/**
+	 * Gets the inner html of this node.
+	 *
+	 * @return string
+	 */
+    abstract public function innerHtml();
+
+	/**
+	 * Gets the html of this node, including it's own
+	 * tag.
+	 *
+	 * @return string
+	 */
+    abstract public function outerHtml();
+
+	/**
+	 * Gets the text of this node (if there is any text).
+	 *
+	 * @return string
+	 */
+    abstract public function text();
+
 	/**
 	 * Call this when something in the node tree has changed. Like a child has been added
 	 * or a parent has been changed.
+	 *
+	 * @return void
 	 */
-    protected function clear() {}
+    abstract protected function clear();
 }

src/PHPHtmlParser/Dom/TextNode.php

@@ -1,8 +1,6 @@
 <?php
 namespace PHPHtmlParser\Dom;
 
-use PHPHtmlParser\Dom;
-
 class TextNode extends Node {
 
 	/**
@@ -69,6 +67,28 @@ public function text()
 		}
 	}
 
+	/**
+	 * This node has no html, just return the text.
+	 *
+	 * @return string
+	 * @uses $this->text()
+	 */
+	public function innerHtml()
+	{
+		return $this->text();
+	}
+
+	/**
+	 * This node has no html, just return the text.
+	 *
+	 * @return string
+	 * @uses $this->text()
+	 */
+	public function outerHtml()
+	{
+		return $this->text();
+	}
+
 	/**
 	 * Call this when something in the node tree has changed. Like a child has been added
 	 * or a parent has been changed.

tests/Node/ChildrenTest.php

@@ -1,6 +1,6 @@
 <?php
 
-use PHPHtmlParser\Dom\Node;
+use PHPHtmlParser\Dom\MockNode as Node;
 
 class NodeChildTest extends PHPUnit_Framework_TestCase {
 

tests/Node/ParentTest.php

@@ -1,6 +1,6 @@
 <?php
 
-use PHPHtmlParser\Dom\Node;
+use PHPHtmlParser\Dom\MockNode as Node;
 
 class NodeParentTest extends PHPUnit_Framework_TestCase {