SiiNunit
{

class_name : single_cmpnt {
 single: "ok"
}

long_class_name : two.components {
 long: "ok"
}

no_space_before_colon: one.two.three {
 many: "ok"
}

digits : 1.2.3.456 {
 digits: "ok"
}

mixed : a_1.2a._3.4_.5_6a {
 mixed: "ok"
}

class: .foo.bar {
 nameless: "ok"
}

}
