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-rw-r--r--dom/heapsnapshot/tests/gtest/SerializesEverythingInHeapGraphOnce.cpp37
1 files changed, 37 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/gtest/SerializesEverythingInHeapGraphOnce.cpp b/dom/heapsnapshot/tests/gtest/SerializesEverythingInHeapGraphOnce.cpp
new file mode 100644
index 000000000..475442df8
--- /dev/null
+++ b/dom/heapsnapshot/tests/gtest/SerializesEverythingInHeapGraphOnce.cpp
@@ -0,0 +1,37 @@
+/* -*- 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 everything in the heap graph gets serialized once, and only once.
+
+#include "DevTools.h"
+
+DEF_TEST(SerializesEverythingInHeapGraphOnce, {
+ FakeNode nodeA;
+ FakeNode nodeB;
+ FakeNode nodeC;
+ FakeNode nodeD;
+
+ AddEdge(nodeA, nodeB);
+ AddEdge(nodeB, nodeC);
+ AddEdge(nodeC, nodeD);
+ AddEdge(nodeD, nodeA);
+
+ ::testing::NiceMock<MockWriter> writer;
+
+ // Should serialize each node once.
+ ExpectWriteNode(writer, nodeA);
+ ExpectWriteNode(writer, nodeB);
+ ExpectWriteNode(writer, nodeC);
+ ExpectWriteNode(writer, nodeD);
+
+ JS::AutoCheckCannotGC noGC(cx);
+
+ ASSERT_TRUE(WriteHeapGraph(cx,
+ JS::ubi::Node(&nodeA),
+ writer,
+ /* wantNames = */ false,
+ /* zones = */ nullptr,
+ noGC));
+ });