vendor/syn/tests/test_item.rs

   1 #[macro_use]
   2 mod macros;
   3
   4 use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
   5 use quote::quote;
   6 use std::iter::FromIterator;
   7 use syn::Item;
   8
   9 #[test]
  10 fn test_macro_variable_attr() {
  11     // mimics the token stream corresponding to `$attr fn f() {}`
  12     let tokens = TokenStream::from_iter(vec![
  13         TokenTree::Group(Group::new(Delimiter::None, quote! { #[test] })),
  14         TokenTree::Ident(Ident::new("fn", Span::call_site())),
  15         TokenTree::Ident(Ident::new("f", Span::call_site())),
  16         TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
  17         TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
  18     ]);
  19
  20     snapshot!(tokens as Item, @r###"
  21     Item::Fn {
  22         attrs: [
  23             Attribute {
  24                 style: Outer,
  25                 path: Path {
  26                     segments: [
  27                         PathSegment {
  28                             ident: "test",
  29                             arguments: None,
  30                         },
  31                     ],
  32                 },
  33                 tokens: TokenStream(``),
  34             },
  35         ],
  36         vis: Inherited,
  37         sig: Signature {
  38             ident: "f",
  39             generics: Generics,
  40             output: Default,
  41         },
  42         block: Block,
  43     }
  44     "###);
  45 }