public function testResetByPassingNullAsCallable()
{
$this->callback->expects($this->exactly(2))->method('execute');
memoize([$this->callback, 'execute']);
memoize([$this->callback, 'execute']);
$this->assertNull(memoize(null));
memoize([$this->callback, 'execute']);
memoize([$this->callback, 'execute']);
}