67 lines
1.6 KiB
Rust
67 lines
1.6 KiB
Rust
//! When input is split across multiple attributes on one element,
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//! darling should collapse that into one struct.
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use darling::{Error, FromDeriveInput};
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use syn::parse_quote;
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#[derive(Debug, FromDeriveInput, PartialEq, Eq)]
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#[darling(attributes(split))]
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struct Lorem {
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foo: String,
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bar: bool,
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}
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#[test]
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fn split_attributes_accrue_to_instance() {
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let di = parse_quote! {
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#[split(foo = "Hello")]
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#[split(bar)]
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pub struct Foo;
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};
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let parsed = Lorem::from_derive_input(&di).unwrap();
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assert_eq!(
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parsed,
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Lorem {
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foo: "Hello".to_string(),
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bar: true,
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}
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);
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}
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#[test]
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fn duplicates_across_split_attrs_error() {
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let di = parse_quote! {
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#[split(foo = "Hello")]
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#[split(foo = "World", bar)]
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pub struct Foo;
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};
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let pr = Lorem::from_derive_input(&di).unwrap_err();
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assert!(pr.has_span());
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assert_eq!(pr.to_string(), Error::duplicate_field("foo").to_string());
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}
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#[test]
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fn multiple_errors_accrue_to_instance() {
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let di = parse_quote! {
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#[split(foo = "Hello")]
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#[split(foo = "World")]
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pub struct Foo;
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};
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let pr = Lorem::from_derive_input(&di);
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let err: Error = pr.unwrap_err();
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assert_eq!(2, err.len());
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let mut errs = err.into_iter().peekable();
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assert_eq!(
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errs.peek().unwrap().to_string(),
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Error::duplicate_field("foo").to_string()
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);
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assert!(errs.next().unwrap().has_span());
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assert_eq!(
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errs.next().unwrap().to_string(),
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Error::missing_field("bar").to_string()
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);
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assert!(errs.next().is_none());
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}
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