Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php | ||
| 17 | class CompletePurchaseRequestTest extends TestCase | ||
| 18 | { | ||
| 19 | private $request; | ||
| 20 | |||
| 21 | private $purse = 'ec12345'; | ||
| 22 | private $secret = '22SAD#-78G8sdf$88'; | ||
| 23 | private $hash = '1d4d18e1eea386654e1af89e89f1a104'; // d41d8cd98f00b204e9800998ecf8427e 954f1176a05a5921118f49285beea2bb | ||
| 24 | private $description = 'Test Transaction long description'; | ||
| 25 | private $transactionId = '1SD672345A890sd'; | ||
| 26 | private $transactionReference = 'sdfa1SD672345A8'; | ||
| 27 | private $timestamp = '1454331086'; | ||
|  | |||
| 28 | private $amount = '1465.01'; | ||
| 29 | private $currency = 'USD'; | ||
| 30 | private $testMode = true; | ||
| 31 | |||
| 32 | public function setUp() | ||
| 53 | |||
| 54 | View Code Duplication | public function testGetData() | |
| 64 | |||
| 65 | public function testSendData() | ||
| 71 | } | ||
| 72 | 
This check marks private properties in classes that are never used. Those properties can be removed.