Expand description
Library that helps you to simulate exception without panic in async Rust.
There is an unsync version unsync::ExceptionContext and a sync version sync::ExceptionContext.
Check this blog for the main idea.
Example:
type ExcptCtx = asex::unsync::ExceptionContext<String>;
async fn perform(ctx: &ExcptCtx, success: bool) -> String {
if success {
"success".to_string()
} else {
ctx.throw("failed".to_string()).await
}
}
tokio_test::block_on(async {
let r = ExcptCtx::new()
.catching(|ctx| async move {
assert_eq!("success".to_string(), perform(ctx, true).await);
perform(ctx, false).await;
unreachable!() // The previous statement throws an exception.
})
.await;
assert_eq!(Err("failed".to_string()), r)
});