public function testOutput()
{
$helper = new SlotsHelper();
$helper->set('foo', 'bar');
ob_start();
$ret = $helper->output('foo');
$output = ob_get_clean();
$this->assertEquals('bar', $output, '->output() outputs the content of a slot');
$this->assertTrue($ret, '->output() returns true if the slot exists');
ob_start();
$ret = $helper->output('bar', 'bar');
$output = ob_get_clean();
$this->assertEquals('bar', $output, '->output() takes a default value to return if the slot does not exist');
$this->assertTrue($ret, '->output() returns true if the slot does not exist but a default value is provided');
ob_start();
$ret = $helper->output('bar');
$output = ob_get_clean();
$this->assertEquals('', $output, '->output() outputs nothing if the slot does not exist');
$this->assertFalse($ret, '->output() returns false if the slot does not exist');
}