add Prometheus library

Prometheus/testsuite/src/GaugeTest.h

@@ -0,0 +1,38 @@
+//
+// GaugeTest.h
+//
+// Definition of the GaugeTest class.
+//
+// Copyright (c) 2022, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef GaugeTest_INCLUDED
+#define GaugeTest_INCLUDED
+
+
+#include "CppUnit/TestCase.h"
+
+
+class GaugeTest: public CppUnit::TestCase
+{
+public:
+	GaugeTest(const std::string& name);
+	~GaugeTest() = default;
+
+	void testBasicBehavior();
+	void testInvalidName();
+	void testLabels();
+	void testExport();
+
+	void setUp();
+	void tearDown();
+
+	static CppUnit::Test* suite();
+};
+
+
+#endif // GaugeTest_INCLUDED