rustc/vendor/darling/tests/skip.rs

//! Test that skipped fields are not read into structs when they appear in input.

#[macro_use]
extern crate darling;
#[macro_use]
extern crate syn;
#[macro_use]
extern crate quote;

use darling::FromDeriveInput;

#[derive(Debug, PartialEq, Eq, FromDeriveInput)]
#[darling(attributes(skip_test))]
pub struct Lorem {
    ipsum: String,

    #[darling(skip)]
    dolor: u8,
}

/// Verify variant-level and field-level skip work correctly for enums.
#[derive(Debug, FromMeta)]
pub enum Sit {
    Amet(bool),

    #[darling(skip)]
    Foo {
        hello: bool,
    },

    Bar {
        hello: bool,
        #[darling(skip)]
        world: u8,
    },
}

#[test]
fn verify_skipped_field_not_required() {
    let di = parse_quote! {
        #[skip_test(ipsum = "Hello")]
        struct Baz;
    };

    assert_eq!(
        Lorem::from_derive_input(&di).unwrap(),
        Lorem {
            ipsum: "Hello".to_string(),
            dolor: 0,
        }
    );
}