31 lines
1.1 KiB
Rust
31 lines
1.1 KiB
Rust
use darling::FromDeriveInput;
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use syn::{parse_quote, Ident, LitStr, Path};
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#[derive(Debug, FromDeriveInput)]
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#[darling(supports(struct_unit), attributes(bar))]
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pub struct Bar {
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pub ident: Ident,
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pub st: Path,
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pub file: LitStr,
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}
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/// Per [#96](https://github.com/TedDriggs/darling/issues/96), make sure that an
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/// attribute which isn't a valid meta gets an error.
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/// Properties can be split across multiple attributes; this test ensures that one
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/// non-meta attribute does not interfere with the parsing of other, well-formed attributes.
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#[test]
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fn non_meta_attribute_does_not_block_others() {
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let di = parse_quote! {
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#[derive(Bar)]
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#[bar(st = RocketEngine: Debug)]
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#[bar(file = "motors/example_6.csv")]
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pub struct EstesC6;
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};
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let errors: darling::Error = Bar::from_derive_input(&di).unwrap_err().flatten();
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// The number of errors here is 2:
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// - The parsing error caused by a where-clause body where it doesn't belong
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// - The missing `st` value because the parsing failure blocked that attribute from
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// being read.
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assert_eq!(2, errors.len());
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}
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