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diff --git a/src/VBox/Devices/Network/testcase/CppUnitEmulation.h b/src/VBox/Devices/Network/testcase/CppUnitEmulation.h
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+++ b/src/VBox/Devices/Network/testcase/CppUnitEmulation.h
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+/* $Id: CppUnitEmulation.h $ */
+/** @file
+ * Simple cppunit emulation
+ */
+
+/*
+ * Copyright (C) 2007-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#ifndef VBOX_INCLUDED_SRC_Network_testcase_CppUnitEmulation_h
+#define VBOX_INCLUDED_SRC_Network_testcase_CppUnitEmulation_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/test.h>
+
+#define CPPUNIT_TEST_SUITE(a_Name) \
+public: \
+    RTEXITCODE run(void) \
+    { \
+        RTTEST hTest = NIL_RTTEST; \
+        RTEXITCODE rcExit = RTTestInitAndCreate(#a_Name, &hTest); \
+        if (rcExit == RTEXITCODE_SUCCESS) \
+        { \
+            RTTestBanner(hTest)
+
+#define CPPUNIT_TEST(a_MethodName) \
+            RTTestISub(#a_MethodName); \
+            setUp(); \
+            a_MethodName(); \
+            tearDown()
+
+#define CPPUNIT_TEST_SUITE_END() \
+            rcExit = RTTestSummaryAndDestroy(hTest); \
+        } \
+        return rcExit; \
+    } \
+    typedef int dummy_end
+
+#define CPPUNIT_FAIL(a_Msg)                         RTTestIFailed(a_Msg)
+#if __cplusplus+0 < 201100
+# define CPPUNIT_ASSERT_EQUAL(a_Value1, a_Value2)   RTTESTI_CHECK((a_Value1) == (a_Value2))
+#else
+# define CPPUNIT_ASSERT_EQUAL(a_Value1, a_Value2) do { \
+        auto const Val1 = (a_Value1); \
+        auto const Val2 = (a_Value2); \
+        if (Val1 != Val2) \
+            RTTestIFailed("%s (%#llx) != %s (%#llx)", #a_Value1, (uint64_t)Val1, #a_Value2, (uint64_t)Val2); \
+    } while (0)
+#endif
+
+#endif /* !VBOX_INCLUDED_SRC_Network_testcase_CppUnitEmulation_h */