Add OptionalAndUnionArguments test

crates/webidl-tests/simple.js

@@ -67,7 +67,7 @@ global.UndefinedMethod = class UndefinedMethod {
   }
 };
 
-global.OptionalMethod = class OptionalMethod {
+global.NullableMethod = class NullableMethod {
   constructor() {}
   opt(a) {
     if (a == undefined) {
@@ -107,6 +107,13 @@ global.Indexing = function () {
   });
 };
 
+global.OptionalAndUnionArguments = class OptionalAndUnionArguments {
+  constructor() {}
+  m(a, b = true, c = 123, d = 456) {
+    return [typeof a, a, typeof b, b, typeof c, c, typeof d, d].join(', ');
+  }
+};
+
 global.PartialInterface = class PartialInterface {
   get un() {
     return 1;

crates/webidl-tests/simple.rs

@@ -56,8 +56,8 @@ fn one_method_using_an_undefined_import_doesnt_break_all_other_methods() {
 }
 
 #[wasm_bindgen_test]
-fn optional_method() {
-    let f = OptionalMethod::new().unwrap();
+fn nullable_method() {
+    let f = NullableMethod::new().unwrap();
     assert!(f.opt(Some(15)) == Some(16));
     assert!(f.opt(None) == None);
 }
@@ -78,6 +78,19 @@ fn indexing() {
     assert_eq!(f.get(123), -1);
 }
 
+#[wasm_bindgen_test]
+fn optional_and_union_arguments() {
+    let f = OptionalAndUnionArguments::new().unwrap();
+    assert_eq!(f.m_using_a("abc"), "string, abc, boolean, true, number, 123, number, 456");
+    assert_eq!(f.m_using_a_and_b("abc", false), "string, abc, boolean, false, number, 123, number, 456");
+    assert_eq!(f.m_using_dom_str_and_bool_and_i16("abc", false, 5), "string, abc, boolean, false, number, 5, number, 456");
+    assert_eq!(f.m_using_dom_str_and_bool_and_dom_str("abc", false, "5"), "string, abc, boolean, false, string, 5, number, 456");
+    assert_eq!(f.m_using_dom_str_and_bool_and_i16_and_opt_i64("abc", false, 5, Some(10)), "string, abc, boolean, false, number, 5, bigint, 10");
+    assert_eq!(f.m_using_dom_str_and_bool_and_i16_and_opt_bool("abc", false, 5, Some(true)), "string, abc, boolean, false, number, 5, boolean, true");
+    assert_eq!(f.m_using_dom_str_and_bool_and_dom_str_and_opt_i64("abc", false, "5", Some(10)), "string, abc, boolean, false, string, 5, bigint, 10");
+    assert_eq!(f.m_using_dom_str_and_bool_and_dom_str_and_opt_bool("abc", false, "5", Some(true)), "string, abc, boolean, false, string, 5, boolean, true");
+}
+
 #[wasm_bindgen_test]
 fn unforgeable_is_structural() {
     let f = Unforgeable::new().unwrap();

crates/webidl-tests/simple.webidl

@@ -31,7 +31,7 @@ interface UndefinedMethod {
 };
 
 [Constructor()]
-interface OptionalMethod {
+interface NullableMethod {
   octet? opt(short? a);
 };
 
@@ -47,6 +47,16 @@ interface Indexing {
   deleter void (unsigned long index);
 };
 
+[Constructor()]
+interface OptionalAndUnionArguments {
+  DOMString m(
+    DOMString a,
+    optional boolean b = true,
+    optional (short or DOMString) c = 123,
+    optional (long long or boolean)? d = 456
+  );
+};
+
 [Constructor()]
 interface Unforgeable {
   [Unforgeable] readonly attribute short uno;

crates/webidl/src/lib.rs

@@ -789,7 +789,10 @@ impl<'src> WebidlParse<'src, &'src str> for weedle::interface::ConstMember<'src>
         };
 
         let ty = match idl_type.to_syn_type(TypePosition::Return) {
-            None => return Ok(()),
+            None => {
+                warn!("Can not convert const type to syn type: {:?}", idl_type);
+                return Ok(());
+            },
             Some(ty) => ty,
         };
 

crates/webidl/src/util.rs

@@ -234,7 +234,10 @@ impl<'src> FirstPassRecord<'src> {
             IdlType::Void => None,
             ret @ _ => {
                 match ret.to_syn_type(TypePosition::Return) {
-                    None => return Vec::new(),
+                    None => {
+                        warn!("Can not convert return type to syn type: {:?}", ret);
+                        return Vec::new();
+                    },
                     Some(ret) => Some(ret),
                 }
             },
@@ -312,6 +315,7 @@ impl<'src> FirstPassRecord<'src> {
                 let syn_type = if let Some(syn_type) = idl_type.to_syn_type(TypePosition::Argument) {
                     syn_type
                 } else {
+                    warn!("Can not convert argument type to syn type: {:?}", idl_type);
                     continue 'outer;
                 };
                 let argument_name = rust_ident(&argument_name.to_snake_case());