csvpp 0.5.0

Compile csvpp source code to a target spreadsheet format
Documentation 
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use crate::ModulePath;
use rand::Rng;
use std::fs;
use std::path;

/// Only to be used as a helper in tests, this makes it easy to create a text file that will get
/// cleaned up by the borrow checker.  It provides two important properties:
///
/// * A random filename -  we need this because tests run in parallel and will step on each
/// other's runs otherwise.
///
/// * A `Drop` trait impl - this makes sure the files get cleaned up after the tests run.  The
/// same functionality as an "after each" step in other test frameworks.
///
#[derive(Clone, Debug)]
pub(crate) struct TestFile {
    pub(crate) path: path::PathBuf,
    in_dir: bool,
}

impl From<&TestFile> for ModulePath {
    fn from(tf: &TestFile) -> Self {
        ModulePath::try_from(tf.path.clone()).unwrap()
    }
}

impl TestFile {
    pub(crate) fn new(ext: &str, input: &str) -> Self {
        let mut rng = rand::thread_rng();
        let filename = format!("unit_test_file_{}.{ext}", rng.gen::<u64>());
        let path = path::Path::new(&filename);
        fs::write(path, input).unwrap();

        Self {
            path: path.to_path_buf(),
            in_dir: false,
        }
    }

    pub(crate) fn new_in_dir(ext: &str, input: &str) -> Self {
        let mut rng = rand::thread_rng();
        let dir = rng.gen::<u64>().to_string();
        fs::create_dir(&dir).unwrap();
        let filename = format!("{}/unit_test_file_{}.{ext}", &dir, rng.gen::<u64>());
        let path = path::Path::new(&filename);
        fs::write(path, input).unwrap();

        Self {
            path: path.to_path_buf(),
            in_dir: true,
        }
    }
}

impl Drop for TestFile {
    fn drop(&mut self) {
        fs::remove_file(&self.path).unwrap();
        if self.in_dir {
            fs::remove_dir(self.path.parent().unwrap()).unwrap();
        }
    }
}