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|
use indoc::indoc;
use proc_macro2::{Delimiter, Group, TokenStream};
use quote::quote;
#[track_caller]
fn test(tokens: TokenStream, expected: &str) {
let syntax_tree: syn::File = syn::parse2(tokens).unwrap();
let pretty = prettyplease::unparse(&syntax_tree);
assert_eq!(pretty, expected);
}
#[test]
fn test_parenthesize_cond() {
let s = Group::new(Delimiter::None, quote!(Struct {}));
test(
quote! {
fn main() {
if #s == #s {}
}
},
indoc! {"
fn main() {
if (Struct {}) == (Struct {}) {}
}
"},
);
}
#[test]
fn test_parenthesize_match_guard() {
let expr_struct = Group::new(Delimiter::None, quote!(Struct {}));
let expr_binary = Group::new(Delimiter::None, quote!(true && false));
test(
quote! {
fn main() {
match () {
() if let _ = #expr_struct => {}
() if let _ = #expr_binary => {}
}
}
},
indoc! {"
fn main() {
match () {
() if let _ = Struct {} => {}
() if let _ = (true && false) => {}
}
}
"},
);
}
|
