[−][src]Macro k9::assert_err_matches_regex
Asserts that the passed Result
argument is an Err
and
and the debug string of that error matches provided regex.
Regular expressions are compiled using regex
crate.
use k9::assert_err_matches_regex; // Borrowed from Rust by Example: https://doc.rust-lang.org/stable/rust-by-example/std/result.html fn divide(x: f64, y: f64) -> Result<f64, &'static str> { if y == 0.0 { // This operation would `fail`, instead let's return the reason of // the failure wrapped in `Err` Err("Cannot divide by 0.") } else { // This operation is valid, return the result wrapped in `Ok` Ok(x / y) } } let division_error = divide(4.0, 0.0); assert_err_matches_regex!(division_error, "Cannot");