public function testApply()
{
$this->assertEquals([1, 3, 5, 7, 9], apply('range', [1, 10, 2]));
$this->assertEquals(time(), apply('time'), '', 0.1);
$this->assertEquals([1, 3, 5, 7, 9], call_user_func(apply, 'range', [1, 10, 2]));
$this->assertEquals('\\nspl\\f\\apply', apply);
}