Rust Macro for assert for pattern matching

gistfile1.rs

macro_rules! assert_match(
    ($given:expr , $expected:ident) => (
        match $given {
            $expected => {},
            _ => fail!("assertion failed: no match (given: `{:?}`, expected: `{:s}`)",
                       $given, stringify!($expected))
        }
    );
)