1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testPrivateGCThingValue.cpp b/js/src/jsapi-tests/testPrivateGCThingValue.cpp
new file mode 100644
index 000000000..db0b46fa1
--- /dev/null
+++ b/js/src/jsapi-tests/testPrivateGCThingValue.cpp
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+* vim: set ts=8 sts=4 et sw=4 tw=99:
+*/
+/* 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 "jsapi.h"
+
+#include "js/HeapAPI.h"
+#include "jsapi-tests/tests.h"
+
+class TestTracer : public JS::CallbackTracer
+{
+    void onChild(const JS::GCCellPtr& thing) override {
+        if (thing.asCell() == expectedCell && thing.kind() == expectedKind)
+            found = true;
+    }
+
+  public:
+    js::gc::Cell* expectedCell;
+    JS::TraceKind expectedKind;
+    bool found;
+
+    explicit TestTracer(JSContext* cx)
+      : JS::CallbackTracer(cx),
+        found(false)
+    { }
+};
+
+static const JSClass TestClass = {
+    "TestClass",
+    JSCLASS_HAS_RESERVED_SLOTS(1)
+};
+
+BEGIN_TEST(testPrivateGCThingValue)
+{
+    JS::RootedObject obj(cx, JS_NewObject(cx, &TestClass));
+    CHECK(obj);
+
+    // Make a JSScript to stick into a PrivateGCThingValue.
+    JS::RootedScript script(cx);
+    const char code[] = "'objet petit a'";
+    JS::CompileOptions options(cx);
+    options.setFileAndLine(__FILE__, __LINE__);
+    CHECK(JS_CompileScript(cx, code, sizeof(code) - 1, options, &script));
+    JS_SetReservedSlot(obj, 0, PrivateGCThingValue(script));
+
+    TestTracer trc(cx);
+    trc.expectedCell = script;
+    trc.expectedKind = JS::TraceKind::Script;
+    JS::TraceChildren(&trc, JS::GCCellPtr(obj, JS::TraceKind::Object));
+    CHECK(trc.found);
+
+    return true;
+}
+END_TEST(testPrivateGCThingValue)