src/libcore/tests/fmt/mod.rs

   1 mod builders;
   2 mod float;
   3 mod num;
   4
   5 #[test]
   6 #[cfg(not(miri))] // Miri cannot print pointers
   7 fn test_format_flags() {
   8     // No residual flags left by pointer formatting
   9     let p = "".as_ptr();
  10     assert_eq!(format!("{:p} {:x}", p, 16), format!("{:p} 10", p));
  11
  12     assert_eq!(format!("{: >3}", 'a'), "  a");
  13 }
  14
  15 #[test]
  16 #[cfg(not(miri))] // Miri cannot print pointers
  17 fn test_pointer_formats_data_pointer() {
  18     let b: &[u8] = b"";
  19     let s: &str = "";
  20     assert_eq!(format!("{:p}", s), format!("{:p}", s.as_ptr()));
  21     assert_eq!(format!("{:p}", b), format!("{:p}", b.as_ptr()));
  22 }
  23
  24 #[test]
  25 fn test_estimated_capacity() {
  26     assert_eq!(format_args!("").estimated_capacity(), 0);
  27     assert_eq!(format_args!("{}", "").estimated_capacity(), 0);
  28     assert_eq!(format_args!("Hello").estimated_capacity(), 5);
  29     assert_eq!(format_args!("Hello, {}!", "").estimated_capacity(), 16);
  30     assert_eq!(format_args!("{}, hello!", "World").estimated_capacity(), 0);
  31     assert_eq!(format_args!("{}. 16-bytes piece", "World").estimated_capacity(), 32);
  32 }