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|
use snafu::prelude::*;
mod basics {
use super::*;
use std::sync::atomic::{AtomicUsize, Ordering};
static COUNTER: AtomicUsize = AtomicUsize::new(0);
#[derive(Debug)]
struct OccurrenceCount(usize);
impl snafu::GenerateImplicitData for OccurrenceCount {
fn generate() -> Self {
OccurrenceCount(COUNTER.fetch_add(1, Ordering::SeqCst))
}
}
#[derive(Debug, Snafu)]
enum ErrorOne {
Alpha {
#[snafu(implicit)]
occurrence: OccurrenceCount,
},
}
#[test]
fn implicit_fields_are_constructed() {
let ErrorOne::Alpha {
occurrence: OccurrenceCount(o1),
} = AlphaSnafu.build();
let ErrorOne::Alpha {
occurrence: OccurrenceCount(o2),
} = AlphaSnafu.build();
assert_eq!(o1, 0);
assert_eq!(o2, 1);
}
}
mod multiple_fields {
use super::*;
#[derive(Debug, PartialEq)]
struct ImplicitData;
impl snafu::GenerateImplicitData for ImplicitData {
fn generate() -> Self {
ImplicitData
}
}
#[derive(Debug, Snafu)]
struct Error {
#[snafu(implicit)]
one: ImplicitData,
#[snafu(implicit)]
two: ImplicitData,
}
#[test]
fn multiple_implicit_fields_are_constructed() {
let Error { one, two } = Snafu.build();
assert_eq!(one, two);
}
}
mod with_and_without_source {
use snafu::{prelude::*, FromString, IntoError};
#[derive(Debug, PartialEq)]
enum ItWas {
Generate,
GenerateWithSource,
}
#[derive(Debug)]
struct ImplicitData(ItWas);
impl snafu::GenerateImplicitData for ImplicitData {
fn generate() -> Self {
Self(ItWas::Generate)
}
fn generate_with_source(_: &dyn snafu::Error) -> Self {
Self(ItWas::GenerateWithSource)
}
}
#[derive(Debug, Snafu)]
struct InnerError;
#[derive(Debug, Snafu)]
struct HasSource {
source: InnerError,
#[snafu(implicit)]
data: ImplicitData,
}
#[derive(Debug, Snafu)]
struct NoSource {
#[snafu(implicit)]
data: ImplicitData,
}
#[derive(Debug, Snafu)]
#[snafu(context(false))]
struct HasSourceNoContext {
source: InnerError,
#[snafu(implicit)]
data: ImplicitData,
}
#[derive(Debug, Snafu)]
#[snafu(whatever, display("{message}"))]
struct MyOwnWhatever {
message: String,
#[snafu(source(from(Box<dyn std::error::Error>, Some)))]
source: Option<Box<dyn std::error::Error>>,
#[snafu(implicit)]
data: ImplicitData,
}
#[test]
fn calls_generate_for_no_source() {
let e = NoSourceSnafu.build();
assert_eq!(e.data.0, ItWas::Generate);
}
#[test]
fn calls_generate_with_source_for_source() {
let e = HasSourceSnafu.into_error(InnerError);
assert_eq!(e.data.0, ItWas::GenerateWithSource);
}
#[test]
fn calls_generate_for_none() {
let e = NoSourceSnafu.into_error(snafu::NoneError);
assert_eq!(e.data.0, ItWas::Generate);
}
#[test]
fn calls_generate_with_source_for_no_context() {
let e = HasSourceNoContext::from(InnerError);
assert_eq!(e.data.0, ItWas::GenerateWithSource);
}
#[test]
fn calls_generate_for_whatever_with_no_source() {
let e = MyOwnWhatever::without_source("bang".into());
assert_eq!(e.data.0, ItWas::Generate);
}
#[test]
fn calls_generate_with_source_for_whatever_with_source() {
let e = MyOwnWhatever::with_source(Box::new(InnerError), "bang".into());
assert_eq!(e.data.0, ItWas::GenerateWithSource);
}
}
mod converted_sources {
use snafu::{prelude::*, IntoError};
#[derive(Debug)]
struct ImplicitData;
impl snafu::GenerateImplicitData for ImplicitData {
fn generate() -> Self {
Self
}
}
#[derive(Debug, Snafu)]
struct HasSource {
backtrace: snafu::Backtrace,
#[snafu(implicit)]
data: ImplicitData,
#[snafu(source(from(String, Into::into)))]
source: Box<dyn std::error::Error>,
}
#[test]
fn receives_the_error_after_conversion() {
let e = HasSourceSnafu.into_error(String::from("bad"));
// Mostly testing that this compiles; assertion is bonus
assert_eq!(e.source.to_string(), "bad");
}
}
|
