all_asserts

A crate for multiple types of asserts that don't exist in the standard library

Rationale

There are several kinds of problems that I had faced while writing tests, especially when writing comparator tests. The output from the existing macros, were providing vague outputs while debugging which made me write this crate. I had created an RFC, but neverthless it was rejected as there were not enough use cases. I am not too sure about others, but I find myself writing multiple tests that make use of these asserts.

Importing and using

Add these lines to your rust application:

#[macro_use]
use all_asserts;

And now you can use the asserts wherever you like!

An example using assert_range!:

use all_asserts::assert_range;
fn main() {
    assert_range!((10..20), 20);
}

This outputs something like:

thread 'main' panicked at 'assertion failed: 
`20 is not in range of 10..20` : it should have been in this range

An example using assert_lt!:

thread 'main' panicked at 'assertion failed: `(left < right) but here (left >= right)`
  left: `100`,
 right: `200`', src/main.rs:79:5

Isn't that much better than what the current macros provide? Well, I'll leave you to decide!

Usage of the macros

The name of the assert pretty much tells you everything:

assert_gt!(a, b) -> Will panic if a is not greater than b
assert_ge!(a, b) -> Will panic if a is not greater than or equal to b
assert_lt!(a, b) -> Will panic if a is not less than b
assert_le!(a, b) -> Will panic if a is not greater than or equal to b
assert_range((x..y), b) -> Will panic if b is not within the range [x, y)
assert_nrange((x..y), b) -> Will panic if b is within the range [x, y)

Building

Simply run:

$ git clone https://github.com/ohsayan/all_asserts.git
$ cd all_asserts
$ cargo build

And for testing:

$ cargo test

Contributing

Your welcome to!

"No man is an island!"

And I always stick to that belief! Please help me out in better formatting the output to make debugging easier. If you find an issue, go ahead a create one! (All doubts, questions and ideas are welcome)

License

This project is licensed under the Apache-2.0 License.

all_asserts 2.0.1