3 assert_eq!("1", format!("{:.0}", 1.0f64));
4 assert_eq!("9", format!("{:.0}", 9.4f64));
5 assert_eq!("10", format!("{:.0}", 9.9f64));
6 assert_eq!("9.8", format!("{:.1}", 9.849f64));
7 assert_eq!("9.9", format!("{:.1}", 9.851f64));
8 assert_eq!("1", format!("{:.0}", 0.5f64));
9 assert_eq!("1.23456789e6", format!("{:e}", 1234567.89f64));
10 assert_eq!("1.23456789e3", format!("{:e}", 1234.56789f64));
11 assert_eq!("1.23456789E6", format!("{:E}", 1234567.89f64));
12 assert_eq!("1.23456789E3", format!("{:E}", 1234.56789f64));
13 assert_eq!("0.0", format!("{:?}", 0.0f64));
14 assert_eq!("1.01", format!("{:?}", 1.01f64));
16 let high_cutoff = 1e16_f64;
17 assert_eq!("1e16", format!("{:?}", high_cutoff));
18 assert_eq!("-1e16", format!("{:?}", -high_cutoff));
19 assert!(!is_exponential(&format!("{:?}", high_cutoff * (1.0 - 2.0 * f64::EPSILON))));
20 assert_eq!("-3.0", format!("{:?}", -3f64));
21 assert_eq!("0.0001", format!("{:?}", 0.0001f64));
22 assert_eq!("9e-5", format!("{:?}", 0.00009f64));
23 assert_eq!("1234567.9", format!("{:.1?}", 1234567.89f64));
24 assert_eq!("1234.6", format!("{:.1?}", 1234.56789f64));
28 fn test_format_f32() {
29 assert_eq!("1", format!("{:.0}", 1.0f32));
30 assert_eq!("9", format!("{:.0}", 9.4f32));
31 assert_eq!("10", format!("{:.0}", 9.9f32));
32 assert_eq!("9.8", format!("{:.1}", 9.849f32));
33 assert_eq!("9.9", format!("{:.1}", 9.851f32));
34 assert_eq!("1", format!("{:.0}", 0.5f32));
35 assert_eq!("1.2345679e6", format!("{:e}", 1234567.89f32));
36 assert_eq!("1.2345679e3", format!("{:e}", 1234.56789f32));
37 assert_eq!("1.2345679E6", format!("{:E}", 1234567.89f32));
38 assert_eq!("1.2345679E3", format!("{:E}", 1234.56789f32));
39 assert_eq!("0.0", format!("{:?}", 0.0f32));
40 assert_eq!("1.01", format!("{:?}", 1.01f32));
42 let high_cutoff = 1e16_f32;
43 assert_eq!("1e16", format!("{:?}", high_cutoff));
44 assert_eq!("-1e16", format!("{:?}", -high_cutoff));
45 assert!(!is_exponential(&format!("{:?}", high_cutoff * (1.0 - 2.0 * f32::EPSILON))));
46 assert_eq!("-3.0", format!("{:?}", -3f32));
47 assert_eq!("0.0001", format!("{:?}", 0.0001f32));
48 assert_eq!("9e-5", format!("{:?}", 0.00009f32));
49 assert_eq!("1234567.9", format!("{:.1?}", 1234567.89f32));
50 assert_eq!("1234.6", format!("{:.1?}", 1234.56789f32));
53 fn is_exponential(s: &str) -> bool {
54 s.contains("e") || s.contains("E")