Rand derive 2

Derive macro for generating random types with the rand crate.

Usage

Check out the example crate or follow the instructions below.

1. Add this to your Cargo.toml file:

[dependencies]
rand-derive = "0.1"
rand = "0.7"

2. Import the macro somewhere in your file where your type is:

use rand_derive2::RandGen;

Alternatively, use this to global import the macro:

#[macro_use]
extern crate rand_derive2;

3. Add the RandGen derive macro for your type:

#[derive(RandGen)]
struct MyStruct {}

4. Generate your struct:

fn generate_my_struct() -> MyStruct { 
    rand::random()
}

Customization

Note: all things that can be customized is covered in the example crate

Options

To make sure an option is never generated with None, add the always_some attribute on top of the property.

Skip enum variant

If a variant should never be generated, add the skip_variant attribute on the variant.

Custom value

If you want a custom value for one of the properties, add the custom_rand attribute. A trait is created called TestDataProviderFor$TYPE$. This trait will require the user to provider the values.

How it works

Structs

It calls rng.gen() on all the fields.

Enums

It will generate a random variant.

TODO

• Recursion for e.g. vec in vec
• More types from the standard library covered
• Functions documented
• Custom trait type/method names

License

MIT