Componentpedia / Listings / assert_matches

Last update: 12/05/2025

assert_matches

Provides macro `assert_matches` for testing pattern matching

Latest version: 1.5.0 registry icon
Maintenance score
0
Safety score
0
Popularity score
72
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Security
  Vulnerabilities
Version Suggest Low Medium High Critical
1.5.0 0 0 0 0 0
1.4.0 0 0 0 0 0
1.3.0 0 0 0 0 0
1.2.0 0 0 0 0 0
1.1.0 0 0 0 0 0
1.0.1 0 0 0 0 0
1.0.0 0 0 0 0 0

Stability
Latest release:

1.5.0 - This version may not be safe as it has not been updated for a long time. Find out if your coding project uses this component and get notified of any reported security vulnerabilities with Meterian-X Open Source Security Platform

Licensing

Maintain your licence declarations and avoid unwanted licences to protect your IP the way you intended.

Apache-2.0   -   Apache License 2.0

Not a wildcard

Not proprietary

OSI Compliant

MIT   -   MIT License

Not a wildcard

Not proprietary

OSI Compliant

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.