public function testEncryptionWithDecryption()
 {
     $filter = new Zend_Filter_File_Encrypt();
     $filter->setFilename(dirname(__FILE__) . '/../_files/newencryption.txt');
     $filter->setVector('testvect');
     $this->assertEquals(dirname(__FILE__) . '/../_files/newencryption.txt', $filter->filter(dirname(__FILE__) . '/../_files/encryption.txt'));
     $this->assertNotEquals('Encryption', file_get_contents(dirname(__FILE__) . '/../_files/newencryption.txt'));
     $filter = new Zend_Filter_File_Decrypt();
     $filter->setVector('testvect');
     $input = $filter->filter(dirname(__FILE__) . '/../_files/newencryption.txt');
     $this->assertEquals(dirname(__FILE__) . '/../_files/newencryption.txt', $input);
     $this->assertEquals('Encryption', trim(file_get_contents(dirname(__FILE__) . '/../_files/newencryption.txt')));
 }