PreferPHPUnitSelfCallRector

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Changes PHPUnit calls from $this->assert*() to self::assert*()

 use PHPUnit\Framework\TestCase;

 final class SomeClass extends TestCase
 {
     public function run()
     {
-        $this->assertEquals('expected', $result);
+        self::assertEquals('expected', $result);
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\CodeQuality\Rector\Class_\PreferPHPUnitSelfCallRector;

return RectorConfig::configure()
    ->withRules([
        PreferPHPUnitSelfCallRector::class,
    ]);