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//! Test that skipped fields are not read into structs when they appear in input.
use darling::{FromDeriveInput, FromMeta};
use syn::parse_quote;
#[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,
}
);
}
/// This test verifies that a skipped field will still prefer an explicit default
/// over the default that would come from its field type. It would be incorrect for
/// `Defaulting::from_derive_input` to fail here, and it would be wrong for the value
/// of `dolor` to be `None`.
#[test]
fn verify_default_supersedes_from_none() {
fn default_dolor() -> Option<u8> {
Some(2)
}
#[derive(Debug, PartialEq, Eq, FromDeriveInput)]
#[darling(attributes(skip_test))]
pub struct Defaulting {
#[darling(skip, default = "default_dolor")]
dolor: Option<u8>,
}
let di = parse_quote! {
#[skip_test]
struct Baz;
};
assert_eq!(
Defaulting::from_derive_input(&di).unwrap(),
Defaulting { dolor: Some(2) }
)
}