public void DefaultButtonGroup()
{
var buttonGroup = new ButtonGroup(new Button("Left"), new Button("Middle"), new Button("Right"));
Assert.AreEqual("<div class=\"btn-group\"><button class=\"btn btn-default\">Left</button>"
+ "<button class=\"btn btn-default\">Middle</button>"
+ "<button class=\"btn btn-default\">Right</button></div>",
buttonGroup.ToHtmlString());
}