62 lines
1.3 KiB
Rust
62 lines
1.3 KiB
Rust
use anyhow::anyhow;
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use std::error::Error as StdError;
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use std::fmt::{self, Display};
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use std::io;
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#[derive(Debug)]
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enum TestError {
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Io(io::Error),
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}
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impl Display for TestError {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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match self {
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TestError::Io(e) => Display::fmt(e, formatter),
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}
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}
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}
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impl StdError for TestError {
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fn source(&self) -> Option<&(dyn StdError + 'static)> {
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match self {
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TestError::Io(io) => Some(io),
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}
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}
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}
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#[test]
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fn test_literal_source() {
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let error = anyhow!("oh no!");
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assert!(error.source().is_none());
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}
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#[test]
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fn test_variable_source() {
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let msg = "oh no!";
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let error = anyhow!(msg);
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assert!(error.source().is_none());
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let msg = msg.to_owned();
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let error = anyhow!(msg);
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assert!(error.source().is_none());
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}
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#[test]
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fn test_fmt_source() {
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let error = anyhow!("{} {}!", "oh", "no");
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assert!(error.source().is_none());
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}
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#[test]
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fn test_io_source() {
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let io = io::Error::new(io::ErrorKind::Other, "oh no!");
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let error = anyhow!(TestError::Io(io));
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assert_eq!("oh no!", error.source().unwrap().to_string());
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}
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#[test]
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fn test_anyhow_from_anyhow() {
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let error = anyhow!("oh no!").context("context");
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let error = anyhow!(error);
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assert_eq!("oh no!", error.source().unwrap().to_string());
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}
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