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 |
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18 | class EZP22958SearchSubtreePathstringFormatTest extends BaseTest |
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19 | { |
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20 | protected function setUp() |
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24 | |||
25 | /** |
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26 | * Tests that invalid path string provided for subtree criterion result in exception. |
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27 | * |
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28 | * @dataProvider searchContentQueryWithInvalidDataProvider |
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29 | * @expectedException \InvalidArgumentException |
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30 | */ |
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31 | View Code Duplication | public function testSearchContentSubtreeShouldThrowException($pathString) |
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41 | |||
42 | /** |
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43 | * Tests that path string provided for subtree criterion is valid. |
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44 | * |
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45 | * @dataProvider searchContentQueryProvider |
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46 | */ |
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47 | View Code Duplication | public function testSearchContentSubtree($pathString) |
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57 | |||
58 | View Code Duplication | public function searchContentQueryProvider() |
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72 | |||
73 | View Code Duplication | public function searchContentQueryWithInvalidDataProvider() |
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87 | } |
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88 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.