Testing abstract classes without creating child object

public function __construct($name){
    $this->name = $name;
}
 
abstract protected function getTitle();
 
public function getTitleAndName()
{
    return $this->getTitle() . ' '. $this->name;
}

class Doctor extends Person
{
    protected function getTitle(){
        return 'Dr.';
    }
}

public function testTitleAndNameOutput(){
    $doctor = new Doctor('Danijel');
    $this->assertEquals('Dr. Danijel', $doctor->getTitleAndName());
}

public function testTitleAndNameOutput(){
 
    $mock = $this->getMockBuilder(Person::class)
                 ->setConstructorArgs(['Danijel'])
                 ->getMockForAbstractClass();
 
    $mock->method('getTitle')
         ->willReturn('Dr.');
 
    $this->assertEquals('Dr. Danijel', $mock->getTitleAndName());
}

Tags: testing · phpUnit · abstract class test · testing class