forked from mirrors/gecko-dev
28 lines
1.3 KiB
Rust
28 lines
1.3 KiB
Rust
#![allow(clippy::from_iter_instead_of_collect)]
|
|
|
|
use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
|
|
use std::iter;
|
|
|
|
#[test]
|
|
fn test_fmt_group() {
|
|
let ident = Ident::new("x", Span::call_site());
|
|
let inner = TokenStream::from_iter(iter::once(TokenTree::Ident(ident)));
|
|
let parens_empty = Group::new(Delimiter::Parenthesis, TokenStream::new());
|
|
let parens_nonempty = Group::new(Delimiter::Parenthesis, inner.clone());
|
|
let brackets_empty = Group::new(Delimiter::Bracket, TokenStream::new());
|
|
let brackets_nonempty = Group::new(Delimiter::Bracket, inner.clone());
|
|
let braces_empty = Group::new(Delimiter::Brace, TokenStream::new());
|
|
let braces_nonempty = Group::new(Delimiter::Brace, inner.clone());
|
|
let none_empty = Group::new(Delimiter::None, TokenStream::new());
|
|
let none_nonempty = Group::new(Delimiter::None, inner);
|
|
|
|
// Matches libproc_macro.
|
|
assert_eq!("()", parens_empty.to_string());
|
|
assert_eq!("(x)", parens_nonempty.to_string());
|
|
assert_eq!("[]", brackets_empty.to_string());
|
|
assert_eq!("[x]", brackets_nonempty.to_string());
|
|
assert_eq!("{ }", braces_empty.to_string());
|
|
assert_eq!("{ x }", braces_nonempty.to_string());
|
|
assert_eq!("", none_empty.to_string());
|
|
assert_eq!("x", none_nonempty.to_string());
|
|
}
|