Drupal 9 compatibility

Drupal 9 compatibility report by Upgrade Status module

LeadBoxer, --
Scanned on Thu, 05/21/2020 - 10:31

FILE: modules/d9/leadboxer/leadboxer.module

STATUS         LINE                           MESSAGE                           
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Check manually 137  Call to deprecated method strtolower() of class             
                    Drupal\Component\Utility\Unicode. Deprecated in drupal:8.6.0
                    and is removed from drupal:9.0.0. Use mb_strtolower()       
                    instead.                                                    
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Check manually 141  Call to deprecated method strtolower() of class             
                    Drupal\Component\Utility\Unicode. Deprecated in drupal:8.6.0
                    and is removed from drupal:9.0.0. Use mb_strtolower()       
                    instead.                                                    
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FILE: modules/d9/leadboxer/src/Tests/LeadBoxerBasicTest.php

STATUS         LINE                           MESSAGE                           
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Fix now        14   Class Drupal\leadboxer\Tests\LeadBoxerBasicTest extends     
                    deprecated class Drupal\simpletest\WebTestBase. Deprecated  
                    in drupal:8.8.0 and is removed from drupal:9.0.0. Instead,  
                    use Drupal\Tests\BrowserTestBase. See                       
                    https://www.drupal.org/node/3030340. Replacement available  
                    from drupal:8.6.0.                                          
--------------------------------------------------------------------------------
Fix now        27   Call to method setUp() of deprecated class                  
                    Drupal\simpletest\WebTestBase. Deprecated in drupal:8.8.0   
                    and is removed from drupal:9.0.0. Instead, use              
                    Drupal\Tests\BrowserTestBase. See                           
                    https://www.drupal.org/node/3030340. Replacement available  
                    from drupal:8.6.0.                                          
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FILE: modules/d9/leadboxer/src/Tests/LeadBoxerRolesTest.php

STATUS         LINE                           MESSAGE                           
--------------------------------------------------------------------------------
Fix now        13   Class Drupal\leadboxer\Tests\LeadBoxerRolesTest extends     
                    deprecated class Drupal\simpletest\WebTestBase. Deprecated  
                    in drupal:8.8.0 and is removed from drupal:9.0.0. Instead,  
                    use Drupal\Tests\BrowserTestBase. See                       
                    https://www.drupal.org/node/3030340. Replacement available  
                    from drupal:8.6.0.                                          
--------------------------------------------------------------------------------
Fix now        26   Call to method setUp() of deprecated class                  
                    Drupal\simpletest\WebTestBase. Deprecated in drupal:8.8.0   
                    and is removed from drupal:9.0.0. Instead, use              
                    Drupal\Tests\BrowserTestBase. See                           
                    https://www.drupal.org/node/3030340. Replacement available  
                    from drupal:8.6.0.                                          
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FILE: modules/d9/leadboxer/leadboxer.info.yml

STATUS         LINE                           MESSAGE                           
--------------------------------------------------------------------------------
Check manually 0    Add core_version_requirement: ^8 || ^9 to      
                    leadboxer.info.yml to designate that the module is          
                    compatible with Drupal 9. See                               
                    https://drupal.org/node/3070687.                            
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