Audio: Add dummy device (in case OpenAL fails to load) and unifiate unit tests

include/Nazara/Audio/DummyAudioSource.inl

@@ -0,0 +1,26 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Audio module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Audio/DummyAudioSource.hpp>
+#include <Nazara/Audio/Debug.hpp>
+
+namespace Nz
+{
+	inline DummyAudioSource::DummyAudioSource(std::shared_ptr<AudioDevice> device) :
+	AudioSource(std::move(device)),
+	m_playClock(0, true),
+	m_status(SoundStatus::Stopped),
+	m_position(Vector3f::Zero()),
+	m_velocity(Vector3f::Zero()),
+	m_isLooping(false),
+	m_isSpatialized(true),
+	m_attenuation(1.f),
+	m_minDistance(1.f),
+	m_pitch(1.f),
+	m_volume(1.f)
+	{
+	}
+}
+
+#include <Nazara/Audio/DebugOff.hpp>