assert_matches

Provides a macro, assert_matches, which tests whether a value matches a given pattern, causing a panic if the match fails.

Documentation

#[macro_use] extern crate assert_matches;

#[derive(Debug)]
enum Foo {
    A(i32),
    B(i32),
}

let a = Foo::A(1);

assert_matches!(a, Foo::A(_));

assert_matches!(a, Foo::A(i) if i > 0);

To include in your project, only when tests are compiled, add the following to your Cargo.toml:

[dev-dependencies]
assert_matches = "1.5"

And add the following to your crate root:

#[cfg(test)] #[macro_use]
extern crate assert_matches;

License

assert_matches is distributed under the terms of both the MIT license and the Apache License (Version 2.0).

See LICENSE-APACHE and LICENSE-MIT for details.