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use std::fmt; use std::error::Error; use std::path::PathBuf; #[derive(Debug)] pub enum TestError { ExpectedOutputDiffers, IoError(std::io::Error), ErrorParsingExitStatus(std::num::ParseIntError), MissingTests(PathBuf), ExpectedDirectory(PathBuf), } impl fmt::Display for TestError { fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { match self { Self::ExpectedOutputDiffers => f.write_str("The expected test output differs"), Self::IoError(err) => fmt::Display::fmt(err, f), Self::ErrorParsingExitStatus(err) => write!(f, "Error parsing exit status: {}", err), Self::MissingTests(path) => write!(f, "Failed to locate test files {}", path.display()), Self::ExpectedDirectory(path) => write!(f, "The path given for test files should be a directory {}", path.display()), } } } impl Error for TestError { }