From 0406e1151312cf41dcb479d56989a2daf651baa3 Mon Sep 17 00:00:00 2001
From: Andrew Nacin <nacin@git.wordpress.org>
Date: Mon, 27 Jan 2014 03:15:29 +0000
Subject: [PATCH] Basic unit tests and additional documentation for
 wp_strip_all_tags().

props joehoyle.
fixes #25507.


git-svn-id: https://develop.svn.wordpress.org/trunk@27042 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/formatting.php                |  4 +++
 .../tests/formatting/WPStripAllTags.php       | 33 +++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 tests/phpunit/tests/formatting/WPStripAllTags.php

diff --git a/src/wp-includes/formatting.php b/src/wp-includes/formatting.php
index ed87b2b8ad..71f1794c52 100644
--- a/src/wp-includes/formatting.php
+++ b/src/wp-includes/formatting.php
@@ -3568,6 +3568,10 @@ function normalize_whitespace( $str ) {
 
 /**
  * Properly strip all HTML tags including script and style
+ * 
+ * This differs from strip_tags() because it removes the contents of 
+ * the <script> and <style> tags. E.g. strip_tags( '<script>something</script>' )
+ * will return 'something'. wp_strip_all_tags will return ''
  *
  * @since 2.9.0
  *
diff --git a/tests/phpunit/tests/formatting/WPStripAllTags.php b/tests/phpunit/tests/formatting/WPStripAllTags.php
new file mode 100644
index 0000000000..3af07b5709
--- /dev/null
+++ b/tests/phpunit/tests/formatting/WPStripAllTags.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Test wp_strip_all_tags()
+ *
+ * @group formatting
+ */
+class Tests_Formatting_WPStripAllTags extends WP_UnitTestCase {
+
+	function test_wp_strip_all_tags() {
+
+		$text = 'lorem<br />ipsum';
+		$this->assertEquals( 'loremipsum', wp_strip_all_tags( $text ) );
+
+		$text = "lorem<br />\nipsum";
+		$this->assertEquals( "lorem\nipsum", wp_strip_all_tags( $text ) );
+
+		// test removing breaks is working
+		$text = "lorem<br />ipsum";
+		$this->assertEquals( "loremipsum", wp_strip_all_tags( $text, true ) );
+
+		// test script / style tag's contents is removed
+		$text = "lorem<script>alert(document.cookie)</script>ipsum";
+		$this->assertEquals( "loremipsum", wp_strip_all_tags( $text ) );
+
+		$text = "lorem<style>* { display: 'none' }</style>ipsum";
+		$this->assertEquals( "loremipsum", wp_strip_all_tags( $text ) );
+
+		// test "marlformed" markup of contents
+		$text = "lorem<style>* { display: 'none' }<script>alert( document.cookie )</script></style>ipsum";
+		$this->assertEquals( "loremipsum", wp_strip_all_tags( $text ) );
+	}
+}
+