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!");

use smoothy::assert_that;

let option: Option<()> = None;
assert_that(option).is_none();

use smoothy::assert_that;

let option: Option<u8> = Some(1);
assert_that(option)
    .is_some()
    .and_value()
    .equals(1)

TODO:

• vec support (length, contains)
• string support (length, contains, starts_with, ends_with)