Hamcrest

Installing

To use Hamcrest, add this to your Cargo.toml:

[dev-dependencies]
hamcrest = "*"

And this to your crate root:

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

After a quick cargo build, you should be good to go!

Usage

Hamcrest supports a number of matchers. The easiest way is to just use them all like this:

use hamcrest::prelude::*;

If you want to be more selective make sure that you also import the HamcrestMatcher trait.

equal_to

assert_that!(1, is(equal_to(1)));

close_to

assert_that!(1e-40f32, is(close_to(0.0, 0.01)));
assert_that!(1e-40f32, is_not(close_to(0.0, 0.000001)));

existing_{file,path,dir}

assert_that!(&path, is(existing_path()));
assert_that!(&path, is(existing_file()));
assert_that!(&path, is_not(existing_dir()));

none

assert_that!(None, is(none::<int>()));
assert_that!(Some(1), is_not(none::<int>()));

contains and contains_exactly

assert_that!(&vec!(1i, 2, 3), contains(vec!(1i, 2)));
assert_that!(&vec!(1i, 2, 3), not(contains(vec!(4i))));

assert_that!(&vec!(1i, 2, 3), contains(vec!(1i, 2, 3)).exactly());
assert_that!(&vec!(1i, 2, 3), not(contains(vec!(1i, 2)).exactly()));

matches_regex

assert_that!("1234", matches_regex(r"\d"));
assert_that!("abc", does_not(match_regex(r"\d")));

License

Licensed under either of

Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

hamcrest 0.1.2