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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)));compared_to
assert_that!(1, is(less_than(2)));
assert_that!(1, is(less_than_or_equal_to(1)));
assert_that!(2, is(greater_than(1)));
assert_that!(2, is(greater_than_or_equal_to(2)));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>()));anything
assert_that!(42, is(anything()));
assert_that!("test", is(anything()));contains, contains_exactly, contains_in order
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()));
assert_that!(&vec!(1i, 2, 3), contains(vec!(1i, 2)).in_order());
assert_that!(&vec!(1i, 2, 3), not(contains(vec!(1i, 3)).in_order()));matches_regex
assert_that!("1234", matches_regex(r"\d"));
assert_that!("abc", does_not(match_regex(r"\d")));type_of
assert_that!(123usize, is(type_of::<usize>()));
assert_that!("test", is(type_of::<&str>()));all_of
assert_that!(4, all_of!(less_than(5), greater_than(3)));
assert_that!(
&vec![1, 2, 3],
all_of!(contains(vec![1, 2]), not(contains(vec![4])))
);any_of
assert_that!(4, any_of!(less_than(2), greater_than(3)));
assert_that!(
&vec![1, 2, 3],
any_of!(contains(vec![1, 2, 5]), not(contains(vec![4])))
);is(bool)
assert_that!(true, is(true));
assert_that!(false, is(false));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.