test: add AudioFormat unit test

test/TestAudioFormat.hxx

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2003-2017 The Music Player Daemon Project
+ * http://www.musicpd.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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TEST_AUDIO_FORMAT_HXX
+#define MPD_TEST_AUDIO_FORMAT_HXX
+
+#include "check.h"
+
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+class AudioFormatTest : public CppUnit::TestFixture {
+	CPPUNIT_TEST_SUITE(AudioFormatTest);
+	CPPUNIT_TEST(TestToString);
+	CPPUNIT_TEST(TestParse);
+	CPPUNIT_TEST_SUITE_END();
+
+public:
+	void TestToString();
+	void TestParse();
+};
+
+#endif