[#411] Add some tests for default-initialized roots

Author: bytesnail

src/rust.rs

@@ -400,11 +400,11 @@ macro_rules! rooted {
     };
     (in($cx:expr) let $name:ident: $type:ty) => {
         let mut __root = $crate::jsapi::Rooted::new_unrooted();
-        let $name = $crate::rust::RootedGuard::new($cx, &mut __root, $type::default());
+        let $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as Default>::default());
     };
     (in($cx:expr) let mut $name:ident: $type:ty) => {
         let mut __root = $crate::jsapi::Rooted::new_unrooted();
-        let mut $name = $crate::rust::RootedGuard::new($cx, &mut __root, $type::default());
+        let mut $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as Default>::default());
     };
 }
 

tests/rooting.rs

@@ -21,6 +21,7 @@ use mozjs::jsapi::JSPROP_ENUMERATE;
 use mozjs::jsapi::JS_SetGCZeal;
 use mozjs::jsapi::OnNewGlobalHookOption;
 use mozjs::jsapi::Value;
+use mozjs::jsval::JSVal;
 use mozjs::rust::{Runtime, SIMPLE_GLOBAL_CLASS, define_methods};
 use std::ptr;
 
@@ -48,6 +49,15 @@ fn rooting() {
     }
 }
 
+#[test]
+fn type_rooting() {
+    let runtime = Runtime::new().unwrap();
+    let cx = runtime.cx();
+
+    rooted!(in(cx) let root : JSVal);
+    assert_eq!(root.get().is_undefined(),true);
+}
+
 unsafe extern "C" fn generic_method(_: *mut JSContext, _: u32, _: *mut Value) -> bool {
     true
 }