foo_orphanize.php

<?php
namespace jubianchi {
    class foo {
        public function __construct($foo, $bar) {
            echo $foo . '-' . $bar;
        }    
    }
}

namespace tests\units\jubianchi {
    use  mageekguy\atoum;

    require_once __DIR__ . '/../../vendor/autoload.php';
    require_once __DIR__ . '/../../vendor/atoum/atoum/scripts/runner.php';


    class foo extends atoum\test {
        public function testFoo() {
            $this
                ->mockGenerator
                    ->orphanize('__construct')
                ->then
                    ->object($object = new \mock\jubianchi\foo())
            ;
        }
    }
}

foo_overload.php

<?php
namespace jubianchi {
    class foo {
        public function __construct($foo, $bar) {
            echo $foo . '-' . $bar;
        }    
    }
}

namespace tests\units\jubianchi {
    use  mageekguy\atoum;

    require_once __DIR__ . '/../../vendor/autoload.php';
    require_once __DIR__ . '/../../vendor/atoum/atoum/scripts/runner.php';


    class foo extends atoum\test {
        public function testFoo() {
            $this
                ->mockGenerator
                    ->overload(new atoum\mock\php\method('__construct'))
                ->and($controller = new atoum\mock\controller())
                ->and($controller->__construct = function() {})
                ->then
                    ->object($object = new \mock\jubianchi\foo($controller))
            ;
        }
    }
}