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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| 14 | final class RedisCacheTest extends \PHPUnit\Framework\TestCase  | 
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| 15 | { | 
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| 16 | /**  | 
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| 17 | * @var Client  | 
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| 18 | */  | 
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| 19 | private $predis;  | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * @var RedisCache  | 
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| 23 | */  | 
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| 24 | private $cache;  | 
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| 25 | |||
| 26 | /**  | 
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| 27 | * @return void  | 
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| 28 | */  | 
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| 29 | public function setUp()  | 
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| 35 | |||
| 36 | /**  | 
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| 37 | * @test  | 
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| 38 | * @covers ::get  | 
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| 39 | *  | 
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| 40 | * @return void  | 
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| 41 | */  | 
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| 42 | public function get()  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * @test  | 
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| 51 | * @covers ::get  | 
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| 52 | *  | 
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| 53 | * @return void  | 
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| 54 | */  | 
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| 55 | public function getKeyNotFound()  | 
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| 60 | |||
| 61 | /**  | 
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| 62 | * @test  | 
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| 63 | * @covers ::getMultiple  | 
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| 64 | *  | 
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| 65 | * @return void  | 
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| 66 | */  | 
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| 67 | public function getMultple()  | 
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| 79 | |||
| 80 | /**  | 
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| 81 | * @test  | 
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| 82 | * @covers ::set  | 
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| 83 | *  | 
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| 84 | * @return void  | 
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| 85 | */  | 
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| 86 | public function set()  | 
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| 95 | |||
| 96 | /**  | 
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| 97 | * @test  | 
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| 98 | * @covers ::set  | 
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| 99 | *  | 
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| 100 | * @return void  | 
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| 101 | */  | 
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| 102 | public function setFails()  | 
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| 109 | |||
| 110 | /**  | 
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| 111 | * @test  | 
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| 112 | * @covers ::setMultiple  | 
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| 113 | *  | 
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| 114 | * @return void  | 
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| 115 | */  | 
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| 116 | public function setMultple()  | 
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| 124 | |||
| 125 | /**  | 
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| 126 | * @test  | 
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| 127 | * @covers ::setMultiple  | 
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| 128 | *  | 
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| 129 | * @return void  | 
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| 130 | */  | 
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| 131 | public function setMultpleFails()  | 
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| 150 | |||
| 151 | /**  | 
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| 152 | * @test  | 
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| 153 | * @covers ::delete  | 
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| 154 | *  | 
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| 155 | * @return void  | 
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| 156 | */  | 
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| 157 | public function delete()  | 
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| 164 | |||
| 165 | /**  | 
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| 166 | * @test  | 
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| 167 | * @covers ::deleteMultiple  | 
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| 168 | *  | 
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| 169 | * @return void  | 
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| 170 | */  | 
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| 171 | View Code Duplication | public function deleteMultiple()  | 
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| 182 | |||
| 183 | /**  | 
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| 184 | * @test  | 
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| 185 | * @covers ::clear  | 
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| 186 | *  | 
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| 187 | * @return void  | 
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| 188 | */  | 
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| 189 | View Code Duplication | public function clear()  | 
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| 200 | |||
| 201 | /**  | 
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| 202 | * @test  | 
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| 203 | * @covers ::has  | 
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| 204 | *  | 
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| 205 | * @return void  | 
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| 206 | */  | 
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| 207 | public function has()  | 
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| 213 | }  | 
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| 214 | 
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: