1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testGetPropertyDescriptor.cpp b/js/src/jsapi-tests/testGetPropertyDescriptor.cpp
new file mode 100644
index 0000000000..f5a76b5b6a
--- /dev/null
+++ b/js/src/jsapi-tests/testGetPropertyDescriptor.cpp
@@ -0,0 +1,54 @@
+/* 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/. */
+
+#include "js/CallAndConstruct.h"  // JS::IsCallable
+#include "js/PropertyAndElement.h"
+#include "js/PropertyDescriptor.h"  // JS::FromPropertyDescriptor, JS_GetPropertyDescriptor
+#include "js/RootingAPI.h"
+#include "jsapi-tests/tests.h"
+
+BEGIN_TEST(test_GetPropertyDescriptor) {
+  JS::RootedValue v(cx);
+  EVAL("({ somename : 123 })", &v);
+  CHECK(v.isObject());
+
+  JS::RootedObject obj(cx, &v.toObject());
+  JS::Rooted<mozilla::Maybe<JS::PropertyDescriptor>> desc(cx);
+  JS::RootedObject holder(cx);
+
+  CHECK(JS_GetPropertyDescriptor(cx, obj, "somename", &desc, &holder));
+  CHECK(desc.isSome());
+  CHECK_SAME(desc->value(), JS::Int32Value(123));
+
+  JS::RootedValue descValue(cx);
+  CHECK(JS::FromPropertyDescriptor(cx, desc, &descValue));
+  CHECK(descValue.isObject());
+  JS::RootedObject descObj(cx, &descValue.toObject());
+  JS::RootedValue value(cx);
+  CHECK(JS_GetProperty(cx, descObj, "value", &value));
+  CHECK_EQUAL(value.toInt32(), 123);
+  CHECK(JS_GetProperty(cx, descObj, "get", &value));
+  CHECK(value.isUndefined());
+  CHECK(JS_GetProperty(cx, descObj, "set", &value));
+  CHECK(value.isUndefined());
+  CHECK(JS_GetProperty(cx, descObj, "writable", &value));
+  CHECK(value.isTrue());
+  CHECK(JS_GetProperty(cx, descObj, "configurable", &value));
+  CHECK(value.isTrue());
+  CHECK(JS_GetProperty(cx, descObj, "enumerable", &value));
+  CHECK(value.isTrue());
+
+  CHECK(JS_GetPropertyDescriptor(cx, obj, "not-here", &desc, &holder));
+  CHECK(desc.isNothing());
+
+  CHECK(JS_GetPropertyDescriptor(cx, obj, "toString", &desc, &holder));
+  JS::RootedObject objectProto(cx, JS::GetRealmObjectPrototype(cx));
+  CHECK(objectProto);
+  CHECK_EQUAL(holder, objectProto);
+  CHECK(desc->value().isObject());
+  CHECK(JS::IsCallable(&desc->value().toObject()));
+
+  return true;
+}
+END_TEST(test_GetPropertyDescriptor)