src/libcore/tests/fmt/float.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #[test]
  12 fn test_format_f64() {
  13     assert_eq!("1", format!("{:.0}", 1.0f64));
  14     assert_eq!("9", format!("{:.0}", 9.4f64));
  15     assert_eq!("10", format!("{:.0}", 9.9f64));
  16     assert_eq!("9.8", format!("{:.1}", 9.849f64));
  17     assert_eq!("9.9", format!("{:.1}", 9.851f64));
  18     assert_eq!("1", format!("{:.0}", 0.5f64));
  19     assert_eq!("1.23456789e6", format!("{:e}", 1234567.89f64));
  20     assert_eq!("1.23456789e3", format!("{:e}", 1234.56789f64));
  21     assert_eq!("1.23456789E6", format!("{:E}", 1234567.89f64));
  22     assert_eq!("1.23456789E3", format!("{:E}", 1234.56789f64));
  23 }
  24
  25 #[test]
  26 fn test_format_f32() {
  27     assert_eq!("1", format!("{:.0}", 1.0f32));
  28     assert_eq!("9", format!("{:.0}", 9.4f32));
  29     assert_eq!("10", format!("{:.0}", 9.9f32));
  30     assert_eq!("9.8", format!("{:.1}", 9.849f32));
  31     assert_eq!("9.9", format!("{:.1}", 9.851f32));
  32     assert_eq!("1", format!("{:.0}", 0.5f32));
  33     assert_eq!("1.2345679e6", format!("{:e}", 1234567.89f32));
  34     assert_eq!("1.2345679e3", format!("{:e}", 1234.56789f32));
  35     assert_eq!("1.2345679E6", format!("{:E}", 1234567.89f32));
  36     assert_eq!("1.2345679E3", format!("{:E}", 1234.56789f32));
  37 }