1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use proc_macro::TokenStream;
4use quote::ToTokens;
5
6pub(crate) fn async_test(_args: TokenStream, mut item: TokenStream) -> TokenStream {
7 let mut item_fn: syn::ItemFn = match syn::parse(item.clone()) {
8 Ok(it) => it,
9 Err(e) => {
10 item.extend(TokenStream::from(e.into_compile_error()));
11 return item;
12 }
13 };
14
15 if item_fn.sig.asyncness.is_none() {
16 item.extend(TokenStream::from(
17 syn::Error::new_spanned(
18 item_fn.sig.ident,
19 "The 'async' keyword is missing from the test function declaration",
20 )
21 .into_compile_error(),
22 ));
23 return item;
24 }
25
26 item_fn.sig.asyncness = None;
27
28 let gen_attr = quote::quote! {
29 #[::core::prelude::v1::test]
30 };
31
32 let body = &item_fn.block;
33
34 item_fn.block = syn::parse2(quote::quote! {
35 {
36 let main_ctx = glib::MainContext::new();
37 main_ctx.block_on(async #body)
38 }
39 })
40 .expect("Body parsing failure");
41
42 let mut tokens = TokenStream::new();
43 tokens.extend(TokenStream::from(gen_attr.to_token_stream()));
44 tokens.extend(TokenStream::from(item_fn.into_token_stream()));
45
46 tokens
47}
48