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use std::panic;
use std::sync::{Arc, Mutex};
pub fn test_panic<Func: FnOnce() + panic::UnwindSafe>(func: Func) -> Option<String> {
static PANIC_MUTEX: Mutex<()> = Mutex::new(());
{
let _guard = PANIC_MUTEX.lock();
let panic_file: Arc<Mutex<Option<String>>> = Arc::new(Mutex::new(None));
let prev_hook = panic::take_hook();
{
let panic_file = panic_file.clone();
panic::set_hook(Box::new(move |panic_info| {
let panic_location = panic_info.location().unwrap();
panic_file
.lock()
.unwrap()
.clone_from(&Some(panic_location.file().to_string()));
}));
}
let result = panic::catch_unwind(func);
// Return to the previously set panic hook (maybe default) so that we get nice error
// messages in the tests.
panic::set_hook(prev_hook);
if result.is_err() {
panic_file.lock().unwrap().clone()
} else {
None
}
}
}