public function test()
{
$this->assertNotSpot('never_emit_spot();');
// array_combine
$this->assertHasSpot('array_combine();');
// ob_start
$this->assertNotSpot('ob_start();');
$this->assertNotSpot('ob_start(1, 2);');
$this->assertHasSpot('ob_start(1, 2, 3);');
// htmlentities, htmlspecialchars
$this->assertHasSpot('htmlentities();');
$this->assertHasSpot('htmlspecialchars();');
}