What's the procedure for mocking structs? (programming.dev)

submitted 1 year ago by nerdblood@programming.dev to c/rust@programming.dev

9 comments fedilink hide all child comments

I know there's mockall which seems to be geared towards implementation methods and traits, but I'm wondering about just structs with non-function properties.

In my tests, I want to define initialized structs with values. It works fine to just do it like I normally would in code, but I'm wondering if there's more to it than that. Like if I have a cat struct:

struct Cat { name : String } `

#[cfg(test)] pub mod test { use super::Cat; fn test_create_cat() -> Cat { Cat { name. : String::from("Fred") }; }

That's fine, but should I be doing it differently? What about mockall, is it not meant for structs with properties?

you are viewing a single comment's thread
view the rest of the comments

[-] TehPers@beehaw.org 1 points 1 year ago

A few days later, but keep in mind that if you write your tests in the module you declare your structs, you'll have access to its "private" (non-pub) members since those are technically module scoped (default scope is pub(self)).

pub struct Cat {
    name: String,
}

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

    #[test]
    fn create_cat() {
        let cat = Cat {
            name: "fluffy".into(),
        };
    }
}

Playground

this post was submitted on 04 Aug 2023

2 points (100.0% liked)

Rust

6025 readers

1 users here now

Welcome to the Rust community! This is a place to discuss about the Rust programming language.

Wormhole

!performance@programming.dev

Credits

The icon is a modified version of the official rust logo (changing the colors to a gradient and black background)

founded 1 year ago

MODERATORS

snowe@programming.dev

Ategon@programming.dev

EdTheLegendary@programming.dev

kahnclusions@programming.dev

torcherist@programming.dev