1 files changed, 64 insertions, 0 deletions
diff --git a/js/rust/tests/value.rs b/js/rust/tests/value.rs
new file mode 100644
index 0000000000..0622268cd8
--- /dev/null
+++ b/js/rust/tests/value.rs
@@ -0,0 +1,64 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#[macro_use]
+extern crate js;
+
+use js::jsapi::root::JS_NewGlobalObject;
+use js::jsapi::root::JS::OnNewGlobalHookOption;
+use js::jsapi::root::JS::RealmOptions;
+use js::jsval::UndefinedValue;
+use js::rust::{Runtime, SIMPLE_GLOBAL_CLASS};
+
+use std::ptr;
+
+#[test]
+fn is_symbol() {
+    let rt = Runtime::new(false).unwrap();
+    let cx = rt.cx();
+
+    unsafe {
+        rooted!(in(cx) let global =
+            JS_NewGlobalObject(cx, &SIMPLE_GLOBAL_CLASS, ptr::null_mut(),
+                               OnNewGlobalHookOption::FireOnNewGlobalHook,
+                               &RealmOptions::default())
+        );
+        rooted!(in(cx) let mut rval = UndefinedValue());
+        assert!(rt
+            .evaluate_script(
+                global.handle(),
+                "Symbol('test')",
+                "test",
+                1,
+                rval.handle_mut()
+            )
+            .is_ok());
+        assert!(rval.is_symbol());
+    }
+}
+
+#[test]
+fn is_not_symbol() {
+    let rt = Runtime::new(false).unwrap();
+    let cx = rt.cx();
+
+    unsafe {
+        rooted!(in(cx) let global =
+            JS_NewGlobalObject(cx, &SIMPLE_GLOBAL_CLASS, ptr::null_mut(),
+                               OnNewGlobalHookOption::FireOnNewGlobalHook,
+                               &RealmOptions::default())
+        );
+        rooted!(in(cx) let mut rval = UndefinedValue());
+        assert!(rt
+            .evaluate_script(
+                global.handle(),
+                "'not a symbol'",
+                "test",
+                1,
+                rval.handle_mut()
+            )
+            .is_ok());
+        assert!(!rval.is_symbol());
+    }
+}