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test(boxed): add failing test for bug #369

This commit is contained in:
Brooks J Rady 2024-04-25 15:34:13 -07:00
parent 4a4111b5d0
commit b087000b7e
1 changed files with 9 additions and 1 deletions
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10
tests/test_boxed.rs
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@ -1,6 +1,7 @@
use miette::{miette, Diagnostic, LabeledSpan, Report, SourceSpan};
use std::error::Error as StdError;
use std::io;
use std::ops::Deref;
use thiserror::Error;
#[derive(Error, Debug)]
@ -159,7 +160,7 @@ impl Diagnostic for CustomDiagnostic {
#[test]
fn test_boxed_custom_diagnostic() {
fn assert_report(report: &Report) {
fn assert_report<T: ?Sized + Diagnostic>(report: &impl Deref<Target = T>) {
assert_eq!(
report.source().map(|source| source.to_string()),
Some("oh no!".to_owned()),
@ -215,6 +216,13 @@ fn test_boxed_custom_diagnostic() {
let main_diagnostic = Box::new(main_diagnostic) as Box<dyn Diagnostic + Send + Sync + 'static>;
let report = miette!(main_diagnostic);
assert_report(&report);
// Now make sure that conversion to a trait-object is lossless!
let report_ref: &dyn Diagnostic = report.as_ref();
assert_report(&report_ref);
let report_box: Box<dyn Diagnostic> = report.into();
assert_report(&report_box);
}
#[test]