value)->toBe('123'); }); it('can be casted to string', function (): void { // GIVEN / WHEN $id = new DummyEntityId('123'); // THEN expect((string) $id)->toBe('123'); }); it('can be compared for equality', function (): void { // GIVEN / WHEN $id1 = new DummyEntityId('123'); $id2 = new DummyEntityId('123'); // THEN expect($id1->equals($id2))->toBeTrue(); }); });