437         assert_eq!(checked_str, "��");  in test_cstr_to_str()
451         assert_eq!(format!("{hello_world}"), "hello, world!");  in test_cstr_display()
453         assert_eq!(format!("{non_printables}"), "\\x01\\x09\\x0a");  in test_cstr_display()
455         assert_eq!(format!("{non_ascii}"), "d\\xe9j\\xe0 vu");  in test_cstr_display()
457         assert_eq!(format!("{good_bytes}"), "\\xf0\\x9f\\xa6\\x80");  in test_cstr_display()
469         assert_eq!(format!("{cstr}"), ALL_ASCII_CHARS);  in test_cstr_display_all_bytes()
476         assert_eq!(format!("{hello_world:?}"), "\"hello, world!\"");  in test_cstr_debug()
478         assert_eq!(format!("{non_printables:?}"), "\"\\x01\\t\\n\"");  in test_cstr_debug()
480         assert_eq!(format!("{non_ascii:?}"), "\"d\\xe9j\\xe0 vu\"");  in test_cstr_debug()
487         assert_eq!(format!("{hello_world}"), "hello, world!");  in test_bstr_display()
489         assert_eq!(format!("{escapes}"), "_\\t_\\n_\\r_\\_'_\"_");  in test_bstr_display()
491         assert_eq!(format!("{others}"), "\\x01");  in test_bstr_display()
493         assert_eq!(format!("{non_ascii}"), "d\\xe9j\\xe0 vu");  in test_bstr_display()
495         assert_eq!(format!("{good_bytes}"), "\\xf0\\x9f\\xa6\\x80");  in test_bstr_display()
502         assert_eq!(format!("{hello_world:?}"), "\"hello, world!\"");  in test_bstr_debug()
504         assert_eq!(format!("{escapes:?}"), "\"_\\t_\\n_\\r_\\\\_'_\\\"_\"");  in test_bstr_debug()
506         assert_eq!(format!("{others:?}"), "\"\\x01\"");  in test_bstr_debug()
508         assert_eq!(format!("{non_ascii:?}"), "\"d\\xe9j\\xe0 vu\"");  in test_bstr_debug()
510         assert_eq!(format!("{good_bytes:?}"), "\"\\xf0\\x9f\\xa6\\x80\"");  in test_bstr_debug()