Merge pull request #3164 from wasmerio/sync-js-sys-tests

Synchronize between -sys and -js tests

lib/api/Cargo.toml

@@ -55,6 +55,7 @@ winapi = "0.3"
 wat = "1.0"
 tempfile = "3.1"
 anyhow = "1.0"
+macro-wasmer-universal-test = { version = "0.1.0", path = "./macro-wasmer-universal-test" }
 
 # Dependencies and Develoment Dependencies for `js`.
 [target.'cfg(target_arch = "wasm32")'.dependencies]
@@ -72,6 +73,7 @@ hashbrown = { version = "0.11", optional = true }
 wat = "1.0"
 anyhow = "1.0"
 wasm-bindgen-test = "0.3.0"
+macro-wasmer-universal-test = { version = "0.1.0", path = "./macro-wasmer-universal-test" }
 
 # Specific to `js`.
 #

lib/api/macro-wasmer-universal-test/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "macro-wasmer-universal-test"
+version = "0.1.0"
+edition = "2021"
+license = "MIT"
+description = "Universal test macro for wasmer-test"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-quote = "0.4.0"
+proc-macro2 = "1.0.43"     
+syn = { version = "1.0.99", features = ["full"] }
+quote = "*"

lib/api/macro-wasmer-universal-test/src/lib.rs

@@ -0,0 +1,36 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use proc_macro2::{Ident, Span};
+
+#[proc_macro_attribute]
+pub fn universal_test(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    let item_clone = item.clone();
+    let mut iter = item_clone.into_iter();
+    let _ = iter.next().unwrap(); // fn
+    let item_tree: proc_macro::TokenTree = iter.next().unwrap(); // fn ...
+    let n = match &item_tree {
+        proc_macro::TokenTree::Ident(i) => i.to_string(),
+        _ => panic!("expected fn ...() -> Result<(), String>"),
+    };
+
+    let function_name_normal = Ident::new(&n, Span::call_site());
+    let function_name_js = Ident::new(&format!("{}_js", n), Span::call_site());
+    let parsed = match syn::parse::<syn::ItemFn>(item) {
+        Ok(o) => o,
+        Err(e) => {
+            return proc_macro::TokenStream::from(e.to_compile_error());
+        }
+    };
+
+    let tokens = quote::quote! {
+        #[cfg(feature = "js")]
+        #[cfg_attr(feature = "js", wasm_bindgen_test)]
+        fn #function_name_js() { #function_name_normal().unwrap(); }
+
+        #[cfg_attr(feature = "sys", test)]
+        #parsed
+    };
+
+    proc_macro::TokenStream::from(tokens)
+}