如何在PHP中用phpunit测试抽象类的静态方法

Question

I need to mock static method of class. But in phpunit:4 and later versions mocking static method is impossible (I get exception with message 'Static method "findBy" cannot be invoked on mock object'). How i need configure mock to get successful test?

I tried create mock class without phphunit manually. Somethig like tests/Mocks/MyClass.php that extends abstract class and implement my static method/

interface IdentityInterface
{
     // this method calling first in other component
    public static function findBy(string $number, ?string $trunk): ?IdentityInterface;
}

abstract class Identity implements IdentityInterface
{
    // this method and other calling after findBy method
    public function getName(): string
    {
        return $this->name; // need to cover
    }
}

My static method must return instance of itself to use other internal methods that i need to cover.