# fe2o3

## Conventions

### Unit Testing

Unit tests are, as is done in Rust, written directly in the src file. PRs without unit tests are not merged. Example from `cargo new`:

```rust
pub fn add(left: usize, right: usize) -> usize {
    left + right
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_works() {
        let result = add(2, 2);
        assert_eq!(result, 4);
    }
}
```