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 |
||
19 | class Test_Domain_Only_Admin_Menu extends WP_UnitTestCase { |
||
20 | |||
21 | /** |
||
22 | * Menu data fixture. |
||
23 | * |
||
24 | * @var array |
||
25 | */ |
||
26 | public static $menu_data; |
||
27 | |||
28 | /** |
||
29 | * Test domain. |
||
30 | * |
||
31 | * @var string |
||
32 | */ |
||
33 | public static $domain; |
||
34 | |||
35 | /** |
||
36 | * Admin menu instance. |
||
37 | * |
||
38 | * @var Domain_Only_Admin_Menu |
||
39 | */ |
||
40 | public static $admin_menu; |
||
41 | |||
42 | /** |
||
43 | * Mock user ID. |
||
44 | * |
||
45 | * @var int |
||
46 | */ |
||
47 | private static $user_id = 0; |
||
48 | |||
49 | /** |
||
50 | * Create shared fixtures. |
||
51 | * |
||
52 | * @param WP_UnitTest_Factory $factory Fixture factory. |
||
53 | */ |
||
54 | public static function wpSetUpBeforeClass( $factory ) { |
||
59 | |||
60 | /** |
||
61 | * Set up data. |
||
62 | */ |
||
63 | View Code Duplication | public function setUp() { |
|
74 | |||
75 | /** |
||
76 | * Tests reregister_menu_items. |
||
77 | * |
||
78 | * @covers ::reregister_menu_items |
||
79 | */ |
||
80 | public function test_reregister_menu_items() { |
||
88 | } |
||
89 |
Let’s assume you have a class which uses late-static binding:
The code above will run fine in your PHP runtime. However, if you now create a sub-class and call the
getSomeVariable()
on that sub-class, you will receive a runtime error:In the case above, it makes sense to update
SomeClass
to useself
instead: