AbstractEntityGetterSetterTester.php

<?php
use PHPUnit\Framework\TestCase;

abstract class AbstractEntityGetterSetterTester extends TestCase
{
    protected $entity;

    /**
     * @dataProvider getData
     */
    public function testSetterGetters($expectedValue,$property){
        call_user_func_array([$this->entity,'set'.ucfirst($property)],[$expectedValue]);
        $actualValue = call_user_func([$this->entity,'get'.ucfirst($property)]);
        $this->assertSame($expectedValue,$actualValue);
    }

    abstract  public function getData();
}

UserTest.php

<?php
use BlackScorp\ORM\Entity\User;


class UserTest extends AbstractEntityGetterSetterTester
{
    public function setUp(): void
    {
        $this->entity = new User();
    }
    public function getData(){
        return [
          'id'=>[1,'id'], //wert,methode
          'username'=>['testUser','username'],  //getUsername,setUsername
          'password'=>['testPassword','password'],//getPassword,setPassword
        ];
    }
}