mageekguy\atoum\runner::setTestDirectoryIterator PHP Method

    public function setTestDirectoryIterator(iterators\recursives\directory\factory $iterator = null)
    {
        $this->testDirectoryIterator = $iterator ?: new iterators\recursives\directory\factory();
        return $this;
    }

 public function testAcceptTestFileExtensions()
 {
     $this->if($runner = new testedClass())->and($runner->setTestDirectoryIterator($directoryIterator = new \mock\mageekguy\atoum\iterators\recursives\directory\factory()))->then->object($runner->acceptTestFileExtensions($testFileExtensions = array(uniqid(), uniqid())))->isIdenticalTo($runner)->mock($directoryIterator)->call('acceptExtensions')->withArguments($testFileExtensions)->once();
 }