1 files changed, 27 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/gtest/SerializesTypeNames.cpp b/devtools/shared/heapsnapshot/tests/gtest/SerializesTypeNames.cpp
new file mode 100644
index 0000000000..4c29b28832
--- /dev/null
+++ b/devtools/shared/heapsnapshot/tests/gtest/SerializesTypeNames.cpp
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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/. */
+
+// Test that a ubi::Node's typeName gets properly serialized into a core dump.
+
+#include "DevTools.h"
+
+using testing::Property;
+using testing::Return;
+
+DEF_TEST(SerializesTypeNames, {
+  FakeNode node;
+
+  ::testing::NiceMock<MockWriter> writer;
+  EXPECT_CALL(
+      writer,
+      writeNode(Property(&JS::ubi::Node::typeName, UTF16StrEq(u"FakeNode")), _))
+      .Times(1)
+      .WillOnce(Return(true));
+
+  JS::AutoCheckCannotGC noGC(cx);
+  ASSERT_TRUE(WriteHeapGraph(cx, JS::ubi::Node(&node), writer,
+                             /* wantNames = */ true,
+                             /* zones = */ nullptr, noGC));
+});