nalgebra/nalgebra-sparse/tests/common/mod.rs

20 lines
868 B
Rust

#[macro_export]
macro_rules! assert_panics {
($e:expr) => {{
use std::panic::{catch_unwind};
use std::stringify;
let expr_string = stringify!($e);
// Note: We cannot manipulate the panic hook here, because it is global and the test
// suite is run in parallel, which leads to race conditions in the sense
// that some regular tests that panic might not output anything anymore.
// Unfortunately this means that output is still printed to stdout if
// we run cargo test -- --nocapture. But Cargo does not forward this if the test
// binary is not run with nocapture, so it is somewhat acceptable nonetheless.
let result = catch_unwind(|| $e);
if result.is_ok() {
panic!("assert_panics!({}) failed: the expression did not panic.", expr_string);
}
}};
}