Hello! We are working on releasing bincode 2, and we want to make sure that bincode 2 produces the same output as bincode 1.3.

For this, we need your help. Please read on if you're using bincode in one of your projects.

We have created a test project that can be used to test the compatibility between bincode 1 and 2. It encodes structs with a wide range of settings, checks if the outputs are the same, and then deserializes the struct and checks if the output is the same.

To add a test case for your project, please follow the following steps:

• Fork https://github.com/bincode-org/bincode
• create a new file compatibility/src/<name>.rs.
• Add a link to your project
• Add Licence: MIT OR Apache-2.0 if you agree to distribute your code under this license
• Add a mod <name>; in the lib.rs. Make sure it's alphabetically ordered (check the ordering in your file system).
• Add your structs.
  • Adding references to libraries is not recommended. Libraries will not be implementing bincode 2's encoding/decoding system.
  • If you need references to libraries, consider adding a test case for that library, and then referencing that test.
• Make sure structs derive the following traits:
  • serde::Serialize and serde::Deserialize, like normal
  • bincode_2::Encode and bincode_2::Decode, for the bincode 2 encode/decode mechanic
  • Because the crate is renamed to bincode_2, you also need to add #[bincode(crate = "bincode_2")]
  • Debug, PartialEq

#[derive(Serialize, Deserialize, bincode_2::Encode, bincode_2::Decode, Debug, PartialEq)]
#[bincode(crate = "bincode_2")]
pub struct YourStruct {
}

• Use rand to be able to generate a random test case for your project.
  • For strings there is a helper function in crate: gen_string(rng: &mut impl Rng) -> String
• Add the following code:

#[test]
pub fn test() {
    let mut rng = rand::thread_rng();
    for _ in 0..1000 {
        crate::test_same(<your_rand_function>(&mut rng));
    }
}

For examples, see the existing cases in compatibility/src/.

• Open a pull request with the title Bincode 1 compatiblity: <name of your project>