Smoothy

Write smooth assertions in a fluent and readable way.

Features

The crate is heavily inspired by AssertJ

• simple and readable syntax
• assertions based on the type of the asserted value
• assertion values use type conversion traits to make assertions readable

Examples

All asserted are stared by calling assert_that on a value.
After that various assertions based on the type of the asserted value can be made.

use smoothy::assert_that;

assert_that(42).equals(42);

use smoothy::assert_that;

assert_that(1u8).try_into_equals(1i8);

use smoothy::assert_that;

assert_that(String::from("Hello")).equals("Hello");

use smoothy::assert_that;

let result: Result<u8, String> = Ok(42);
assert_that(result)
    .is_ok()
    .and_value_equals(42);

use smoothy::assert_that;

let result: Result<(), String> = Err(String::from("ups!"));
assert_that(result)
    .is_err()
    .and_error_to_string_equals("ups!");

TODO:

• is to assert equality in a type safe way (compared to the Into<T> stuff)
• vec support (length, contains)
• string support (length, contains, starts_with, ends_with)
• Documentation and testing :D (especially the difference between is and equals)