1 files changed, 33 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestID.cpp b/xpcom/tests/gtest/TestID.cpp
new file mode 100644
index 0000000000..65b41a2b26
--- /dev/null
+++ b/xpcom/tests/gtest/TestID.cpp
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 4; 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/. */
+
+#include "nsID.h"
+
+#include "gtest/gtest.h"
+
+static const char* const ids[] = {
+    "5C347B10-D55C-11D1-89B7-006008911B81",
+    "{5C347B10-D55C-11D1-89B7-006008911B81}",
+    "5c347b10-d55c-11d1-89b7-006008911b81",
+    "{5c347b10-d55c-11d1-89b7-006008911b81}",
+
+    "FC347B10-D55C-F1D1-F9B7-006008911B81",
+    "{FC347B10-D55C-F1D1-F9B7-006008911B81}",
+    "fc347b10-d55c-f1d1-f9b7-006008911b81",
+    "{fc347b10-d55c-f1d1-f9b7-006008911b81}",
+};
+#define NUM_IDS ((int)(sizeof(ids) / sizeof(ids[0])))
+
+TEST(nsID, StringConversion)
+{
+  nsID id;
+  for (int i = 0; i < NUM_IDS; i++) {
+    const char* idstr = ids[i];
+    ASSERT_TRUE(id.Parse(idstr));
+
+    auto cp = id.ToString();
+    ASSERT_STREQ(cp.get(), ids[4 * (i / 4) + 3]);
+  }
+}