public function testReplace()
{
$styleSet = new StyleSet();
$styleSet->add($style1 = Style::tag('style1')->fgBlue());
$styleSet->replace(array($style2 = Style::tag('style2')->bgMagenta(), $style3 = Style::tag('style3')->bold()));
$this->assertSame(array('style2' => $style2, 'style3' => $style3), $styleSet->toArray());
}