Sorry, probably a badly worded question. In std rust, you can place unit tests in any of the files, like this:
```
#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_my_function() {
        assert_eq!(my_function(), 42);
    }
}
```

However in defmt-test, you can only have one of these in the src folder, so all unit test have to be within one file. I know its different for integration tests, but I was wondering of embedded-test is the same, in that you can only have one in the src folder?