_path = PATH . 'data' . DIRECTORY_SEPARATOR; $this->_dataDirCreated = !is_dir($this->_path); if($this->_dataDirCreated) mkdir($this->_path); $this->_file = $this->_path . 'vizhash.png'; } public function tearDown() { /* Tear Down Routine */ if($this->_dataDirCreated) { helper::rmdir($this->_path); } else { if(!@unlink($this->_file)) { throw new Exception('Error deleting file "' . $this->_file . '".'); } } } public function testVizhashGeneratesUniquePngsPerIp() { $vz = new vizhash16x16(); $pngdata = $vz->generate('127.0.0.1'); file_put_contents($this->_file, $pngdata); $finfo = new finfo(FILEINFO_MIME_TYPE); $this->assertEquals('image/png', $finfo->file($this->_file)); $this->assertNotEquals($pngdata, $vz->generate('2001:1620:2057:dead:beef::cafe:babe')); $this->assertEquals($pngdata, $vz->generate('127.0.0.1')); } }