Function existing_tests

crates/ruff_python_parser/tests/generate_inline_tests.rs:291–309

Returns the existing tests in the given directory.

(dir: &Path)

/// Returns the existing tests in the given directory.
fn existing_tests(dir: &Path) -> Result<HashMap<String, PathBuf>> {
    let mut tests = HashMap::new();

    for file in fs::read_dir(dir)? {
        let path = file?.path();
        if path.extension().unwrap_or_default() != "py" {
            continue;
        }
        let name = path
            .file_stem()
            .map(|x| x.to_string_lossy().to_string())
            .unwrap();
        if let Some(old) = tests.insert(name, path) {
            anyhow::bail!("Multiple test file exists for {old:?}");
        }
    }

    Ok(tests)
}