[#411] Use the GCMethods trait to set initial value && Complete other test cases

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 as Default>::default());
+        let $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as GCMethods>::initial());
     };
     (in($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 as Default>::default());
+        let mut $name = $crate::rust::RootedGuard::new($cx, &mut __root, <$type as GCMethods>::initial());
     };
 }
 

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::jsapi::{JSObject, JSString, JSFunction};
 use mozjs::jsval::JSVal;
 use mozjs::rust::{Runtime, SIMPLE_GLOBAL_CLASS, define_methods};
 use std::ptr;
@@ -54,8 +55,19 @@ 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{
+        rooted!(in(cx) let root : JSVal);
+        assert_eq!(root.get().is_undefined(), true);
+
+        rooted!(in(cx) let root : *mut JSObject);
+        assert_eq!(root.get().is_null(), true);
+
+        rooted!(in(cx) let root : *mut JSString);
+        assert_eq!(root.get().is_null(), true);
+
+        rooted!(in(cx) let root : *mut JSFunction);
+        assert_eq!(root.get().is_null(), true);
+    }
 }
 
 unsafe extern "C" fn generic_method(_: *mut JSContext, _: u32, _: *mut Value) -> bool {