Macro test 

macro_rules! test {
    ($cx:expr, $name:expr, timeout = immediate, $($rest:tt)+) => { ... };
    ($cx:expr, $name:expr, repeat = $times:literal, $($rest:tt)+) => { ... };
    ($cx:expr, $name:expr, timeout = $timeout:literal, $($rest:tt)+) => { ... };
    ($cx:expr, $name:expr, $($rest:tt)+) => { ... };
}