From 58be73fcf779359c2848cc1185e368f012639f24 Mon Sep 17 00:00:00 2001
From: "Edward Z. Yang" <edwardzyang@thewritingpot.com>
Date: Sun, 1 Oct 2006 18:39:48 +0000
Subject: [PATCH] [1.2.0] Added exists() method to HTMLPurifier_Context.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@483 48356398-32a2-884e-a903-53898d9a118a
---
 library/HTMLPurifier/Context.php   | 8 ++++++++
 tests/HTMLPurifier/ContextTest.php | 6 +++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/library/HTMLPurifier/Context.php b/library/HTMLPurifier/Context.php
index 1f58671e..93942ada 100644
--- a/library/HTMLPurifier/Context.php
+++ b/library/HTMLPurifier/Context.php
@@ -52,6 +52,14 @@ class HTMLPurifier_Context
         unset($this->_storage[$name]);
     }
     
+    /**
+     * Checks whether or not the variable exists.
+     * @param $name String name
+     */
+    function exists($name) {
+        return isset($this->_storage[$name]);
+    }
+    
 }
 
 ?>
\ No newline at end of file
diff --git a/tests/HTMLPurifier/ContextTest.php b/tests/HTMLPurifier/ContextTest.php
index b8f5014f..caf8e367 100644
--- a/tests/HTMLPurifier/ContextTest.php
+++ b/tests/HTMLPurifier/ContextTest.php
@@ -18,13 +18,17 @@ class HTMLPurifier_ContextTest extends UnitTestCase
         
         generate_mock_once('HTMLPurifier_IDAccumulator');
         
+        $this->assertFalse($this->context->exists('IDAccumulator'));
+        
         $accumulator =& new HTMLPurifier_IDAccumulatorMock($this);
         $this->context->register('IDAccumulator', $accumulator);
-        // ...
+        $this->assertTrue($this->context->exists('IDAccumulator'));
+        
         $accumulator_2 =& $this->context->get('IDAccumulator');
         $this->assertReference($accumulator, $accumulator_2);
         
         $this->context->destroy('IDAccumulator');
+        $this->assertFalse($this->context->exists('IDAccumulator'));
         $accumulator_3 =& $this->context->get('IDAccumulator');
         $this->assertError('Attempted to retrieve non-existent variable');
         $this->assertNull($accumulator_3);