rust/src/libcore/tests/fmt/float.rs

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// 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.

#[test]
fn test_format_f64() {
    assert_eq!("1", format!("{:.0}", 1.0f64));
    assert_eq!("9", format!("{:.0}", 9.4f64));
    assert_eq!("10", format!("{:.0}", 9.9f64));
    assert_eq!("9.8", format!("{:.1}", 9.849f64));
    assert_eq!("9.9", format!("{:.1}", 9.851f64));
    assert_eq!("1", format!("{:.0}", 0.5f64));
    assert_eq!("1.23456789e6", format!("{:e}", 1234567.89f64));
    assert_eq!("1.23456789e3", format!("{:e}", 1234.56789f64));
    assert_eq!("1.23456789E6", format!("{:E}", 1234567.89f64));
    assert_eq!("1.23456789E3", format!("{:E}", 1234.56789f64));
}

#[test]
fn test_format_f32() {
    assert_eq!("1", format!("{:.0}", 1.0f32));
    assert_eq!("9", format!("{:.0}", 9.4f32));
    assert_eq!("10", format!("{:.0}", 9.9f32));
    assert_eq!("9.8", format!("{:.1}", 9.849f32));
    assert_eq!("9.9", format!("{:.1}", 9.851f32));
    assert_eq!("1", format!("{:.0}", 0.5f32));
    assert_eq!("1.2345679e6", format!("{:e}", 1234567.89f32));
    assert_eq!("1.2345679e3", format!("{:e}", 1234.56789f32));
    assert_eq!("1.2345679E6", format!("{:E}", 1234567.89f32));
    assert_eq!("1.2345679E3", format!("{:E}", 1234.56789f32));
}