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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace SubjectivePHPTest\Csv;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SplFileObject;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SubjectivePHP\Csv\DeriveHeaderStrategy;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use PHPUnit\Framework\TestCase;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @coversDefaultClass \SubjectivePHP\Csv\DeriveHeaderStrategy  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                final class DeriveHeaderStrategyTest extends TestCase  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @test  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @covers ::getHeaders  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function getHeaders()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $strategy = new DeriveHeaderStrategy();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $fileObject = $this->getFileObject();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $headers = $strategy->getHeaders($fileObject);  | 
            
                            
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                        $this->assertSame(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            ['id', 'author', 'title', 'genre', 'price', 'publish_date', 'description'],  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $strategy->getHeaders($fileObject)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @test  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @covers ::isHeaderRow  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
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                View Code Duplication | 
                    public function rowIsHeaderRow()  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $strategy = new DeriveHeaderStrategy();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fileObject = $this->getFileObject();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $headers = $strategy->getHeaders($fileObject);  | 
            
                            
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                        $this->assertTrue($strategy->isHeaderRow($fileObject->fgetcsv()));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @test  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @covers ::isHeaderRow  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
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                View Code Duplication | 
                    public function rowNotIsHeaderRow()  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $strategy = new DeriveHeaderStrategy();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fileObject = $this->getFileObject();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $headers = $strategy->getHeaders($fileObject);  | 
            
                            
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                        $fileObject->fgetcsv();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->assertFalse($strategy->isHeaderRow($fileObject->fgetcsv()));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                View Code Duplication | 
                    private function getFileObject() : SplFileObject  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fileObject = new SplFileObject(__DIR__ . '/_files/pipe_delimited.txt');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fileObject->setFlags(SplFileObject::READ_CSV);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $fileObject->setCsvControl('|'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $fileObject;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.