glib_macros/
async_test.rs

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.with_thread_default(|| main_ctx.block_on(async #body))
38                .expect("cannot set thread default main context for test")
39        }
40    })
41    .expect("Body parsing failure");
42
43    let mut tokens = TokenStream::new();
44    tokens.extend(TokenStream::from(gen_attr.to_token_stream()));
45    tokens.extend(TokenStream::from(item_fn.into_token_stream()));
46
47    tokens
48}
glib_macros/async_test.rs

glib_macros/
async_test.rs
