public function testRender()
{
$f = FunctionGenerator::factory('newFunction');
$f->setBody('some body code', true);
$f->appendToBody('some more body code');
$f->appendToBody('even more body code', false);
$f->addArgument('testVar', 123, 'int');
$f->addParameter('oneMoreTestVar', 789, 'int');
$codeStr = (string) $f;
$code = $f->render(true);
ob_start();
$f->render();
$output = ob_get_clean();
$this->assertContains('function newFunction($testVar = 123, $oneMoreTestVar = 789)', $output);
$this->assertContains('function newFunction($testVar = 123, $oneMoreTestVar = 789)', $code);
$this->assertContains('function newFunction($testVar = 123, $oneMoreTestVar = 789)', $codeStr);
}