expectest

Work In Progress

Library provides functions for unit testing with human-readable syntax. Inspired by Nimble for Swift.

Using this library you will receive nice messages with data that used in test case, example:

let result = vec![1, 2, 2];
expect!(result).to(be_equal_to([1, 2, 3]));

Test fails and gives us a message:

expected to be equal to <[1, 2, 3]>, got <[1, 2, 2]>

Note: You need to use cargo test -- --nocapture to see output from tests.

In Cargo.toml:

[dev-dependencies]
expectest = "*"

In your crate:

#[cfg(test)]
#[macro_use(expect)]
extern crate expectest;

You can export all needed functions and types from prelude module:

use expectest::prelude::*;

Use basic syntax to express expectations:

expect!(...).to(...);
expect!(...).to_not(...);
expect!(...).not_to(...);

Note: You can use expect function instead of expect! macro in that case you will not see file and line where the test fails.

For types that implement the PartialEq trait:

expect!("hello".to_string()).to(be_equal_to("hello"));

There is a way to check if two float numbers are close each other:

expect!(12.1_f64).to(be_close_to(12.0).delta(0.1));

With default delta equal 0.001:

expect!(12.001_f64).to(be_close_to(12.0));

For types that implement the PartialOrd trait:

expect!(1).to(be_greater_than(0));

Use following matchers: be_less_than, be_less_or_equal_to, be_greater_than, be_greater_or_equal_to

expect!(9 == 9).to(be_true());

Use following matchers: be_true, be_false

License

MIT