From 563bc7a399b473631b644cc35e63202fd61987ac Mon Sep 17 00:00:00 2001
From: Tom Kaminski <ttkaminski@gmail.com>
Date: Mon, 18 Feb 2019 12:22:34 -0600
Subject: [PATCH] Prepending self node fix

---
 Tests/HtmlPageCrawlerTest.php | 4 ++++
 src/HtmlPageCrawler.php       | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Tests/HtmlPageCrawlerTest.php b/Tests/HtmlPageCrawlerTest.php
index aebdefa..e9510e0 100644
--- a/Tests/HtmlPageCrawlerTest.php
+++ b/Tests/HtmlPageCrawlerTest.php
@@ -260,6 +260,10 @@ public function testPrepend()
         $c = new HtmlPageCrawler('<div id="content"></div>');
         $c->filter('#content')->prepend(new HtmlPageCrawler('<p>Text before h1</p><p>and more text before</p>'));
         $this->assertEquals('<div id="content"><p>Text before h1</p><p>and more text before</p></div>', $c->saveHTML());
+
+        $c = new HtmlPageCrawler('<div id="content"><span>Prepend Self</span></div>');
+        $c->filter('#content')->prepend($c->filter('span'));
+        $this->assertEquals('<div id="content"><span>Prepend Self</span></div>', $c->saveHTML());
     }
 
     /**
diff --git a/src/HtmlPageCrawler.php b/src/HtmlPageCrawler.php
index e91cefc..e59c3e5 100644
--- a/src/HtmlPageCrawler.php
+++ b/src/HtmlPageCrawler.php
@@ -483,7 +483,7 @@ public function prepend($content)
                 $newnode = static::importNewnode($newnode, $node, $i);
                 if ($refnode === null) {
                     $node->appendChild($newnode);
-                } else {
+                } else if ($refnode !== $newnode) {
                     $node->insertBefore($newnode, $refnode);
                 }
                 $newnodes[] = $newnode;