public function testInvokeFunction()
{
$args1 = ['a b c '];
$this->assertEquals(trim($args1[0]), App::invokeFunction('tests\\thinkphp\\library\\think\\func_trim', $args1));
$args2 = ['abcdefg', 'g'];
$this->assertEquals(strpos($args2[0], $args2[1]), App::invokeFunction('tests\\thinkphp\\library\\think\\func_strpos', $args2));
}