<?php
namespace {
class Baz{
function foo(){
print_r(debug_backtrace());
}
}
function assertTrue(){}
class PHPUnitThing{
function testSomething(){
$baz = new Baz();
assertTrue($baz->foo()); // dirty backtrace
}
}
(new PHPUnitThing)->testSomething(); // dirty backtrace
$baz = new Baz;
assertTrue($baz->foo()); // clean backtrace
}