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expectest 0.5.1

Crate provides matchers and matcher functions for unit testing.
Documentation 
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#[macro_use(expect)]
extern crate expectest;
use expectest::prelude::*;

#[test]
fn equality_of_floats() {
    expect!(12.001_f64).to(be_close_to(12.0));
}

#[test]
fn equality_of_floats_with_delta() {
    expect!(12.1_f64).to(be_close_to(12.0).delta(0.1));
}

#[test]
#[should_panic]
fn equality_of_floats_should_panic() {
    expect!(12.0011_f64).to(be_close_to(12.0));
}

#[test]
#[should_panic]
fn equality_of_floats_with_delta_should_panic() {
    expect!(2.11_f64).to(be_close_to(2.0).delta(0.1));
}