oxedyne/fe2o3 — fe2o3_text/tests/detect

1.3 KiB, 1 run

created by r1870400018:12048, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	//! Utility macros for error handling and logging.
2
3	/// Create a formatted error string and return it as an Err.
4	macro_rules! bail {
5	($($arg:tt)*) => {
6	return Err(format!($($arg)*))
7	};
8	}
9
10	/// Unwrap a Result, returning early on Err with context.
11	macro_rules! try_with {
12	($expr:expr, $ctx:expr) => {
13	match $expr {
14	Ok(val) => val,
15	Err(e) => return Err(format!("{}: {}", $ctx, e)),
16	}
17	};
18	}
19
20	/// Declare a set of string constants.
21	macro_rules! string_consts {
22	($($name:ident = $val:expr),* $(,)?) => {
23	$(pub const $name: &str = $val;)*
24	};
25	}
26
27	string_consts! {
28	VERSION = "0.1.0",
29	APP_NAME = "annealer",
30	CONFIG_DIR = ".config/annealer",
31	}
32
33	#[cfg(test)]
34	mod tests {
35	use super::*;
36
37	#[test]
38	fn test_bail() {
39	fn inner() -> Result<(), String> {
40	bail!("something went wrong: {}", 42);
41	}
42	let err = inner().unwrap_err();
43	assert_eq!(err, "something went wrong: 42");
44	}
45
46	#[test]
47	fn test_try_with() {
48	fn parse(s: &str) -> Result<i32, String> {
49	let n: i32 = try_with!(s.parse(), "bad integer");
50	Ok(n * 2)
51	}
52	assert_eq!(parse("21").unwrap(), 42);
53	assert!(parse("abc").is_err());
54	}
55	}