--- a/include/DebugLog.class.php
+++ b/include/DebugLog.class.php
@@ -180,6 +180,14 @@
 	}
 
 	/**
+	 * Clears the log
+	 */
+	public function Clear()
+	{
+		$this->entries = array();
+	}
+
+	/**
 	 * Notify that observable object changed
 	 *
 	 * @param GitPHP_Observable_Interface $object object

--- /dev/null
+++ b/test/DebugLogTest.php
@@ -1,1 +1,66 @@
+<?php
+/**
+ * DebugLog test class
+ *
+ * @author Christopher Han <xiphux@gmail.com>
+ * @copyright Copyright (c) 2012 Christopher Han
+ * @package GitPHP
+ * @subpackage Test
+ */
+class GitPHP_DebugLogTest extends PHPUnit_Framework_TestCase
+{
+	protected $log;
 
+	protected function setUp()
+	{
+		$this->log = new GitPHP_DebugLog();
+	}
+
+	public function testLog()
+	{
+		$this->assertFalse($this->log->GetEnabled());
+		$this->log->Log('Test log message');
+		$this->log->ObjectChanged(null, GitPHP_Observer_Interface::LoggableChange, array('Test log message'));
+		$this->assertCount(0, $this->log->GetEntries());
+
+		$this->log->SetEnabled(true);
+		$this->assertTrue($this->log->GetEnabled());
+
+		$this->log->Log('Test log message');
+		$this->log->ObjectChanged(null, GitPHP_Observer_Interface::LoggableChange, array('Test log message 2'));
+		$data = $this->log->GetEntries();
+		$this->assertCount(2, $data);
+		$this->assertEquals('DEBUG: Test log message', $data[0]);
+		$this->assertEquals('DEBUG: Test log message 2', $data[1]);
+		
+		$this->log->Clear();
+		$this->assertCount(0, $this->log->GetEntries());
+
+		$this->log->SetEnabled(false);
+		$this->assertFalse($this->log->GetEnabled());
+	}
+
+	public function testBenchmark()
+	{
+		$this->log->SetEnabled(true);
+		$this->assertFalse($this->log->GetBenchmark());
+		$this->log->SetBenchmark(true);
+		$this->assertTrue($this->log->GetBenchmark());
+
+		$this->log->Log('Test log message');
+
+		$data = $this->log->GetEntries();
+
+		$this->assertCount(3, $data);
+		$this->assertRegExp('/^DEBUG: \[[0-9]+(\.[0-9]+)?\] \[[0-9]+ bytes\] Start$/', $data[0]);
+		$this->assertRegExp('/^DEBUG: \[[0-9]+(\.[0-9]+)?\] \[[0-9]+(\.[0-9]+)?(E-[0-9]+)? sec since start\] \[[0-9]+(\.[0-9]+)?(E-[0-9]+)? sec since last\] \[[0-9]+ bytes\] \[[0-9]+ bytes since start\] \[[0-9]+ bytes since last\] Test log message$/', $data[1]);
+		$this->assertRegExp('/^DEBUG: \[[0-9]+(\.[0-9]+)?\] \[[0-9]+(\.[0-9]+)?(E-[0-9]+)? sec since start\] \[[0-9]+(\.[0-9]+)?(E-[0-9]+)? sec since last\] \[[0-9]+ bytes\] \[[0-9]+ bytes since start\] \[[0-9]+ bytes since last\] End$/', $data[2]);
+
+		$this->log->Clear();
+		$this->log->SetBenchmark(false);
+		$this->assertFalse($this->log->GetBenchmark());
+		$this->log->SetEnabled(false);
+	}
+
+}
+