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use error_graph::{ErrorList, WriteErrorList};
#[derive(Debug, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
enum UpperError {
Upper,
Middle(ErrorList<MiddleError>),
}
#[derive(Debug, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
enum MiddleError {
Middle,
Lower(ErrorList<LowerError>),
}
#[derive(Debug, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
enum LowerError {
Lower,
}
fn upper(mut errors: impl WriteErrorList<UpperError>) {
errors.push(UpperError::Upper);
middle(errors.subwriter(UpperError::Middle));
errors.push(UpperError::Upper);
}
fn middle(mut errors: impl WriteErrorList<MiddleError>) {
errors.push(MiddleError::Middle);
lower(errors.subwriter(MiddleError::Lower));
errors.push(MiddleError::Middle);
}
fn lower(mut errors: impl WriteErrorList<LowerError>) {
errors.push(LowerError::Lower);
}
fn lower_errors_only(mut errors: impl WriteErrorList<MiddleError>) {
lower(errors.subwriter(MiddleError::Lower));
}
fn no_errors(mut errors: impl WriteErrorList<UpperError>) {
no_errors_middle(errors.subwriter(UpperError::Middle));
}
fn no_errors_middle(mut errors: impl WriteErrorList<MiddleError>) {
no_errors_lower(errors.subwriter(MiddleError::Lower));
}
fn no_errors_lower(mut _errors: impl WriteErrorList<LowerError>) {}
#[test]
fn empty() {
let mut errors = ErrorList::default();
errors.push(UpperError::Upper);
no_errors_middle(errors.subwriter(UpperError::Middle));
assert_eq!(errors.len(), 1);
}
#[test]
fn basic() {
let mut errors = ErrorList::default();
upper(&mut errors);
let mut upper_it = errors.into_iter();
assert!(matches!(upper_it.next(), Some(UpperError::Upper)));
let Some(UpperError::Middle(middle)) = upper_it.next() else {
panic!();
};
assert!(matches!(upper_it.next(), Some(UpperError::Upper)));
let mut middle_it = middle.into_iter();
assert!(matches!(middle_it.next(), Some(MiddleError::Middle)));
let Some(MiddleError::Lower(lower)) = middle_it.next() else {
panic!();
};
assert!(matches!(middle_it.next(), Some(MiddleError::Middle)));
let mut lower_it = lower.into_iter();
assert!(matches!(lower_it.next(), Some(LowerError::Lower)));
}
#[test]
fn sublist() {
let mut errors = ErrorList::default();
errors.push(UpperError::Upper);
let mut sublist = errors.sublist(UpperError::Middle);
middle(&mut sublist);
assert_eq!(sublist.len(), 3);
drop(sublist);
assert_eq!(errors.len(), 2);
}
#[test]
fn dont_care() {
let mut errors = error_graph::strategy::DontCare;
errors.push(UpperError::Upper);
let mut sublist = errors.sublist(UpperError::Middle);
middle(&mut sublist);
assert_eq!(sublist.len(), 3);
sublist.finish();
middle(errors.subwriter(UpperError::Middle));
}
#[test]
fn error_occurred() {
let mut error_occurred = error_graph::strategy::ErrorOccurred::default();
no_errors(&mut error_occurred);
assert!(!error_occurred.as_bool());
lower_errors_only(&mut error_occurred);
assert!(error_occurred.as_bool());
let mut error_occurred = error_graph::strategy::ErrorOccurred::default();
middle(&mut error_occurred);
assert!(error_occurred.as_bool());
}
#[cfg(feature = "serde")]
#[test]
fn serde() {
const EXPECTED_JSON: &str = r#"[
"Upper",
{
"Middle": [
"Middle",
{
"Lower": [
"Lower"
]
},
"Middle"
]
},
"Upper"
]"#;
let mut errors = ErrorList::default();
upper(&mut errors);
let json = serde_json::to_string_pretty(&errors).unwrap();
assert_eq!(json.as_str(), EXPECTED_JSON);
let recreated_errors: ErrorList<UpperError> = serde_json::from_str(&json).unwrap();
for (left, right) in errors.iter().zip(recreated_errors.iter()) {
assert_eq!(left, right);
}
}
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