Updated the tests

tests/CollectionTest.php

@@ -3,6 +3,7 @@
 use PHPHtmlParser\Selector;
 use PHPHtmlParser\Dom\HtmlNode;
 use PHPHtmlParser\Dom\Tag;
+use PHPHtmlParser\Dom\Collection;
 
 class CollectionTest extends PHPUnit_Framework_TestCase {
 
@@ -27,6 +28,15 @@ public function testEach()
 		$this->assertEquals(2, $count);
 	}
 
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\EmptyCollectionException
+	 */
+	public function testCallNoNodes()
+	{
+		$collection = new Collection();
+		$collection->innerHtml();
+	}
+
 	public function testCallMagic()
 	{
 		$root   = new HtmlNode(new Tag('root'));
@@ -43,6 +53,47 @@ public function testCallMagic()
 		$this->assertEquals($child3->id(), $selector->find($root)->id());
 	}
 
+	public function testGetMagic()
+	{
+		$root   = new HtmlNode(new Tag('root'));
+		$parent = new HtmlNode(new Tag('div'));
+		$child1 = new HtmlNode(new Tag('a'));
+		$child2 = new HtmlNode(new Tag('p'));
+		$child3 = new HtmlNode(new Tag('a'));
+		$root->addChild($parent);
+		$parent->addChild($child1);
+		$parent->addChild($child2);
+		$child2->addChild($child3);
+
+		$selector = new Selector('div * a');
+		$this->assertEquals($child3->innerHtml, $selector->find($root)->innerHtml);
+	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\EmptyCollectionException
+	 */
+	public function testGetNoNodes()
+	{
+		$collection = new Collection();
+		$collection->innerHtml;
+	}
+
+	public function testToStringMagic()
+	{
+		$root   = new HtmlNode(new Tag('root'));
+		$parent = new HtmlNode(new Tag('div'));
+		$child1 = new HtmlNode(new Tag('a'));
+		$child2 = new HtmlNode(new Tag('p'));
+		$child3 = new HtmlNode(new Tag('a'));
+		$root->addChild($parent);
+		$parent->addChild($child1);
+		$parent->addChild($child2);
+		$child2->addChild($child3);
+
+		$selector = new Selector('div * a');
+		$this->assertEquals((string)$child3, (string)$selector->find($root));
+	}
+
 	public function testToArray()
 	{
 		$root   = new HtmlNode(new Tag('root'));

tests/Node/ChildrenTest.php

@@ -32,6 +32,26 @@ public function testNextSibling()
 		$this->assertEquals($child2->id(), $child->nextSibling()->id());
 	}
 
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\ChildNotFoundException
+	 */
+	public function testNextSiblingNotFound()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$child->setParent($parent);
+		$child->nextSibling();
+	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\ParentNotFoundException
+	 */
+	public function testNextSiblingNoParent()
+	{
+		$child = new Node;
+		$child->nextSibling();
+	}
+
 	public function testPreviousSibling()
 	{
 		$parent = new Node;
@@ -42,6 +62,26 @@ public function testPreviousSibling()
 		$this->assertEquals($child->id(), $child2->previousSibling()->id());
 	}
 
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\ChildNotFoundException
+	 */
+	public function testPreviousSiblingNotFound()
+	{
+		$parent = new Node;
+		$node = new Node;
+		$node->setParent($parent);
+		$node->previousSibling();
+	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\ParentNotFoundException
+	 */
+	public function testPreviousSiblingNoParent()
+	{
+		$child = new Node;
+		$child->previousSibling();
+	}
+
 	public function testGetChildren()
 	{
 		$parent = new Node;

tests/Node/HtmlTest.php

@@ -271,7 +271,7 @@ public function testTextNone()
 	{
 		$a    = new Tag('a');
 		$node = new HtmlNode($a);
-		
+
 		$this->assertEmpty($node->text());
 	}
 
@@ -431,4 +431,14 @@ public function testIterator()
 		}
 		$this->assertEquals(2, $children);
 	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\ParentNotFoundException
+	 */
+	public function testAncestorByTagFailure()
+	{
+		$a    = new Tag('a');
+		$node = new HtmlNode($a);
+		$node->ancestorByTag('div');
+	}
 }

tests/Node/ParentTest.php

@@ -54,6 +54,13 @@ public function testRemoveChild()
 		$this->assertFalse($parent->hasChildren());
 	}
 
+	public function testRemoveChildNotExists()
+	{
+		$parent = new Node;
+		$parent->removeChild(1);
+		$this->assertFalse($parent->hasChildren());
+	}
+
 	public function testNextChild()
 	{
 		$parent = new Node;
@@ -129,4 +136,71 @@ public function testLastChild()
 
 		$this->assertEquals($child3->id(), $parent->lastChild()->id());
 	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\CircularException
+	 */
+	public function testSetParentDescendantException()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$parent->addChild($child);
+		$parent->setParent($child);
+	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\CircularException
+	 */
+	public function testAddChildAncestorException()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$parent->addChild($child);
+		$child->addChild($parent);
+	}
+
+	/**
+	 * @expectedException PHPHtmlParser\Exceptions\CircularException
+	 */
+	public function testAddItselfAsChild()
+	{
+		$parent = new Node;
+		$parent->addChild($parent);
+	}
+
+
+	public function testIsAncestorParent()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$parent->addChild($child);
+		$this->assertTrue($child->isAncestor($parent->id()));
+	}
+
+	public function testGetAncestor()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$parent->addChild($child);
+		$ancestor = $child->getAncestor($parent->id());
+		$this->assertEquals($parent->id(), $ancestor->id());
+	}
+
+	public function testGetGreatAncestor()
+	{
+		$parent = new Node;
+		$child  = new Node;
+		$child2 = new Node;
+		$parent->addChild($child);
+		$child->addChild($child2);
+		$ancestor = $child2->getAncestor($parent->id());
+		$this->assertEquals($parent->id(), $ancestor->id());
+	}
+
+	public function testGetAncestorNotFound()
+	{
+		$parent = new Node;
+		$ancestor = $parent->getAncestor(1);
+		$this->assertNull($ancestor);
+	}
 }