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                <?php  | 
            
                            
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                namespace SilverStripe\VersionedAdmin\Tests\Behat\Context;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Behat\Mink\Element\NodeElement;  | 
            
                            
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                use SilverStripe\BehatExtension\Context\SilverStripeContext;  | 
            
                            
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                if (!class_exists(SilverStripeContext::class)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                class FeatureContext extends SilverStripeContext  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see a list of versions  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function iShouldSeeAListOfVersions()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $page = $this->getSession()->getPage();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $versionsTable = $page->find('css', '.history-viewer .table'); | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        assertNotNull($versionsTable, 'I should see a list of versions');  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see a list of versions in descending order  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function iShouldSeeAListOfVersionsInDescendingOrder() { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $page = $this->getSession()->getPage();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $versions = $page->findAll('css', '.history-viewer .table tbody tr td:nth-of-type(1)'); | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $previous = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        foreach ($versions as $version) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            /** @var NodeElement $version */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if ($previous) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                assert($version->getValue() < $previous);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            $previous = $version->getValue();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @When I click on the first version  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function iClickOnTheFirstVersion()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        assertNotNull($this->getFirstVersion(), 'I should see a list of versions');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $firstVersion->click();  | 
            
                            
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                        // Wait for the form builder to load  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        $this->getSession()->wait(3000);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see the :arg1 badge  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function iShouldSeeTheBadge($arg1)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->assertElementContains('.history-viewer .badge', $arg1); | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    protected function getFirstVersion()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $page = $this->getSession()->getPage();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        return $page->find('css', '.history-viewer .table tbody tr'); | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    protected function getSpecificVersion($versionNumber)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $versionColumns = $this->getSession()->getPage()->findAll('css', '.history-viewer tbody tr'); | 
            
            
                                                                        
                            
            
                                    
            
            
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                        foreach($versionColumns as $version) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if (strpos($version->getText(), $versionNumber) !== false) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                return $version;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see :text in the author column in version :versionNumber  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function iShouldSeeInTheAuthorColumn($text, $versionNumber)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $version = $this->getSpecificVersion($versionNumber);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $authorColumn = $version->find('css', 'td:nth-of-type(3)'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $exists = strpos($authorColumn->getText(), $text) !== false;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        assertTrue($exists, 'Author column contains ' . $text);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see :text in the record column in version :versionNumber  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function iShouldSeeInTheRecordColumn($text, $versionNumber)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $version = $this->getSpecificVersion($versionNumber);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $recordColumn = $version->find('css', 'td:nth-of-type(2)'); | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $exists = strpos($recordColumn->getText(), $text) !== false;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        assertTrue($exists, 'Record column contains ' . $text);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @Then I should see :text in the version column in version :versionNumber  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function iShouldSeeInTheVersionColumn($text, $versionNumber)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $version = $this->getSpecificVersion($versionNumber);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $versionColumn = $version->find('css', 'td'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $exists = strpos($versionColumn->getText(), $text) !== false;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                        assertTrue($exists, 'Version column contains ' . $text);    }  | 
            
            
                                                                        
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                                        
                                                                
            
                                    
            
            
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.