// Copyright 2016 Urban Hafner
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#[macro_use]
extern crate hamcrest;

mod close_to {

    use hamcrest::prelude::*;
    use std::f64;

    #[test]
    fn equality_of_floats() {
        assert_that!(1.0f64, is(close_to(1.0, 0.00001)));
        assert_that!(1e-40f32, is(close_to(0.0, 0.01)));
        assert_that!(1e-40f32, is(not(close_to(0.0, 0.000001))));
        assert_that!(2.0, is(not(close_to(1.0f64, 0.00001))));
    }

    #[test]
    fn it_can_handle_infinity() {
        assert_that!(f64::INFINITY, is(close_to(f64::INFINITY, 0.00001)));
    }

    #[test]
    fn it_can_handle_nan() {
        assert_that!(f64::NAN, is(not(close_to(f64::NAN, 0.00001))));
    }

}