Hamcrest

A port of Hamcrest to Rust.

Installing

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

[dev-dependencies.hamcrest]

git = "https://github.com/carllerche/hamcrest-rust.git"

And this to your crate root:

#[cfg(test)]
extern crate hamcrest;

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

Usage

Hamcrest supports a number of matchers. You'll have to use them just like any other Rust library.

equal_to

// Successful match
assert_that(&1, is(equal_to(&1i)));

// Unsuccessful match
let res = task::try(proc() {
    assert_that(&2, is(equal_to(&1i)));
});

assert!(res.is_err());

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()));