public void DefaultButtonToolbar()
{
var buttonGroup = new ButtonGroup(new Button("Left"), new Button("Middle"), new Button("Right"));
var html = "<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>";
var toolbar = new ButtonToolbar(buttonGroup, buttonGroup, buttonGroup);
Assert.AreEqual(string.Format("<div class=\"btn-toolbar\">{0}{0}{0}</div>", html),
toolbar.ToHtmlString());
}