function test_cleanFormat()
{
$svg = '<!--SHAPE{"type":"rect"}-->' . '<!--LAYOUT<rect class="s-rect"/>-->' . '<ellipse class="s-ellipse"/>';
$format = array('svg' => $svg, 'state' => array());
Layout::cleanFormat($format);
$this->assertEquals('<ellipse class="s-ellipse"/>', $format['svg']);
$this->assertArrayNotHasKey('state', $format);
}