Client eventmanager refactor (#7179)

* Drop EventManager from GameDef & do some client cleanups

* EventManager is only used by Client. Don't expose it on Server & GameDef for nothing
* Drop Client::event() in favor of direct calls to getEventManager
* Cleanup some event put from new + put to put(new)
* MtEvent: add Type(u8) enum
* This will enhance event performance & ensure stricter type
* Drop MtEvent::checkIs (unused)

* clang-tidy reported fixes

* Code style

* Move event_manager.h to the client directory as it's only used by client

Add EventManager unittests + switch to unordered_map as order is not important here

Drop a unused function

14 files changed, 249 insertions, 183 deletions

diff --git a/src/camera.cpp b/src/camera.cpp
index 09ff93886..cf96f3308 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -160,15 +160,13 @@ void Camera::step(f32 dtime)
 					(was < 0.5f && m_view_bobbing_anim >= 0.5f) ||
 					(was > 0.5f && m_view_bobbing_anim <= 0.5f));
 			if(step) {
-				MtEvent *e = new SimpleTriggerEvent("ViewBobbingStep");
-				m_client->event()->put(e);
+				m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::VIEW_BOBBING_STEP));
 			}
 		}
 	}
 
-	if (m_digging_button != -1)
-	{
-		f32 offset = dtime * 3.5;
+	if (m_digging_button != -1) {
+		f32 offset = dtime * 3.5f;
 		float m_digging_anim_was = m_digging_anim;
 		m_digging_anim += offset;
 		if (m_digging_anim >= 1)
@@ -179,13 +177,10 @@ void Camera::step(f32 dtime)
 		float lim = 0.15;
 		if(m_digging_anim_was < lim && m_digging_anim >= lim)
 		{
-			if(m_digging_button == 0)
-			{
-				MtEvent *e = new SimpleTriggerEvent("CameraPunchLeft");
-				m_client->event()->put(e);
+			if (m_digging_button == 0) {
+				m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::CAMERA_PUNCH_LEFT));
 			} else if(m_digging_button == 1) {
-				MtEvent *e = new SimpleTriggerEvent("CameraPunchRight");
-				m_client->event()->put(e);
+				m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::CAMERA_PUNCH_RIGHT));
 			}
 		}
 	}
diff --git a/src/client.h b/src/client.h
index 2034a1f9c..5c07d043e 100644
--- a/src/client.h
+++ b/src/client.h
@@ -370,10 +370,9 @@ public:
 	ICraftDefManager* getCraftDefManager() override;
 	ITextureSource* getTextureSource();
 	virtual IShaderSource* getShaderSource();
-	IShaderSource *shsrc() { return getShaderSource(); }
 	u16 allocateUnknownNodeId(const std::string &name) override;
 	virtual ISoundManager* getSoundManager();
-	MtEventManager* getEventManager() override;
+	MtEventManager* getEventManager();
 	virtual ParticleManager* getParticleManager();
 	bool checkLocalPrivilege(const std::string &priv)
 	{ return checkPrivilege(priv); }
diff --git a/src/client/event_manager.h b/src/client/event_manager.h
new file mode 100644
index 000000000..3762e89bf
--- /dev/null
+++ b/src/client/event_manager.h
@@ -0,0 +1,86 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser 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.
+*/
+
+#pragma once
+
+#include "event.h"
+#include <list>
+#include <map>
+
+class EventManager : public MtEventManager
+{
+	static void receiverReceive(MtEvent *e, void *data)
+	{
+		MtEventReceiver *r = (MtEventReceiver *)data;
+		r->onEvent(e);
+	}
+	struct FuncSpec
+	{
+		event_receive_func f;
+		void *d;
+		FuncSpec(event_receive_func f, void *d) : f(f), d(d) {}
+	};
+
+	struct Dest
+	{
+		std::list<FuncSpec> funcs{};
+	};
+	std::map<MtEvent::Type, Dest> m_dest{};
+
+public:
+	~EventManager() override = default;
+
+	void put(MtEvent *e) override
+	{
+		std::map<MtEvent::Type, Dest>::iterator i = m_dest.find(e->getType());
+		if (i != m_dest.end()) {
+			std::list<FuncSpec> &funcs = i->second.funcs;
+			for (FuncSpec &func : funcs) {
+				(*(func.f))(e, func.d);
+			}
+		}
+		delete e;
+	}
+	void reg(MtEvent::Type type, event_receive_func f, void *data) override
+	{
+		std::map<MtEvent::Type, Dest>::iterator i = m_dest.find(type);
+		if (i != m_dest.end()) {
+			i->second.funcs.emplace_back(f, data);
+		} else {
+			Dest dest;
+			dest.funcs.emplace_back(f, data);
+			m_dest[type] = dest;
+		}
+	}
+	void dereg(MtEvent::Type type, event_receive_func f, void *data) override
+	{
+		std::map<MtEvent::Type, Dest>::iterator i = m_dest.find(type);
+		if (i != m_dest.end()) {
+			std::list<FuncSpec> &funcs = i->second.funcs;
+			auto j = funcs.begin();
+			while (j != funcs.end()) {
+				bool remove = (j->f == f && (!data || j->d == data));
+				if (remove)
+					funcs.erase(j++);
+				else
+					++j;
+			}
+		}
+	}
+};
diff --git a/src/clientenvironment.cpp b/src/clientenvironment.cpp
index 8de073258..76ac080d4 100644
--- a/src/clientenvironment.cpp
+++ b/src/clientenvironment.cpp
@@ -227,7 +227,7 @@ void ClientEnvironment::step(float dtime)
 				get(m_map->getNodeNoEx(info.node_p));
 			// Determine fall damage multiplier
 			int addp = itemgroup_get(f.groups, "fall_damage_add_percent");
-			pre_factor = 1.0 + (float)addp/100.0;
+			pre_factor = 1.0f + (float)addp / 100.0f;
 		}
 		float speed = pre_factor * speed_diff.getLength();
 		if (speed > tolerance && !player_immortal) {
@@ -235,8 +235,7 @@ void ClientEnvironment::step(float dtime)
 			u8 damage = (u8)MYMIN(damage_f + 0.5, 255);
 			if (damage != 0) {
 				damageLocalPlayer(damage, true);
-				MtEvent *e = new SimpleTriggerEvent("PlayerFallingDamage");
-				m_client->event()->put(e);
+				m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::PLAYER_FALLING_DAMAGE));
 			}
 		}
 	}
diff --git a/src/event.h b/src/event.h
index 488152855..ae200978c 100644
--- a/src/event.h
+++ b/src/event.h
@@ -19,31 +19,36 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #pragma once
 
+#import "irrlichttypes.h"
+
 class MtEvent
 {
 public:
-	virtual ~MtEvent() = default;
-	//virtual MtEvent* clone(){ return new IEvent; }
-	virtual const char* getType() const = 0;
-
-	MtEvent* checkIs(const std::string &type)
+	enum Type : u8
 	{
-		if(type == getType())
-			return this;
-		return NULL;
-	}
+		VIEW_BOBBING_STEP = 0,
+		CAMERA_PUNCH_LEFT,
+		CAMERA_PUNCH_RIGHT,
+		PLAYER_FALLING_DAMAGE,
+		PLAYER_DAMAGE,
+		NODE_DUG,
+		PLAYER_JUMP,
+		PLAYER_REGAIN_GROUND,
+		TYPE_MAX,
+	};
+
+	virtual ~MtEvent() = default;
+	virtual Type getType() const = 0;
 };
 
 // An event with no parameters and customizable name
-class SimpleTriggerEvent: public MtEvent
+class SimpleTriggerEvent : public MtEvent
 {
-	const char *type;
+	Type type;
+
 public:
-	SimpleTriggerEvent(const char *type):
-		type(type)
-	{}
-	const char* getType() const
-	{return type;}
+	SimpleTriggerEvent(Type type) : type(type) {}
+	Type getType() const override { return type; }
 };
 
 class MtEventReceiver
@@ -60,9 +65,7 @@ class MtEventManager
 public:
 	virtual ~MtEventManager() = default;
 	virtual void put(MtEvent *e) = 0;
-	virtual void reg(const char *type, event_receive_func f, void *data) = 0;
+	virtual void reg(MtEvent::Type type, event_receive_func f, void *data) = 0;
 	// If data==NULL, every occurence of f is deregistered.
-	virtual void dereg(const char *type, event_receive_func f, void *data) = 0;
-	virtual void reg(MtEventReceiver *r, const char *type) = 0;
-	virtual void dereg(MtEventReceiver *r, const char *type) = 0;
+	virtual void dereg(MtEvent::Type type, event_receive_func f, void *data) = 0;
 };
diff --git a/src/event_manager.h b/src/event_manager.h
deleted file mode 100644
index f64d05869..000000000
--- a/src/event_manager.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
-Minetest
-Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser 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.
-*/
-
-#pragma once
-
-#include "event.h"
-#include <list>
-#include <map>
-
-class EventManager: public MtEventManager
-{
-	static void receiverReceive(MtEvent *e, void *data)
-	{
-		MtEventReceiver *r = (MtEventReceiver*)data;
-		r->onEvent(e);
-	}
-	struct FuncSpec{
-		event_receive_func f;
-		void *d;
-		FuncSpec(event_receive_func f, void *d):
-			f(f), d(d)
-		{}
-	};
-	struct Dest{
-		std::list<FuncSpec> funcs;
-	};
-	std::map<std::string, Dest> m_dest;
-
-public:
-	~EventManager() = default;
-
-	void put(MtEvent *e)
-	{
-		std::map<std::string, Dest>::iterator i = m_dest.find(e->getType());
-		if(i != m_dest.end()){
-			std::list<FuncSpec> &funcs = i->second.funcs;
-			for (FuncSpec &func : funcs) {
-				(*(func.f))(e, func.d);
-			}
-		}
-		delete e;
-	}
-	void reg(const char *type, event_receive_func f, void *data)
-	{
-		std::map<std::string, Dest>::iterator i = m_dest.find(type);
-		if(i != m_dest.end()){
-			i->second.funcs.emplace_back(f, data);
-		} else{
-			std::list<FuncSpec> funcs;
-			Dest dest;
-			dest.funcs.emplace_back(f, data);
-			m_dest[type] = dest;
-		}
-	}
-	void dereg(const char *type, event_receive_func f, void *data)
-	{
-		if(type != NULL){
-			std::map<std::string, Dest>::iterator i = m_dest.find(type);
-			if(i != m_dest.end()){
-				std::list<FuncSpec> &funcs = i->second.funcs;
-				std::list<FuncSpec>::iterator j = funcs.begin();
-				while(j != funcs.end()){
-					bool remove = (j->f == f && (!data || j->d == data));
-					if(remove)
-						funcs.erase(j++);
-					else
-						++j;
-				}
-			}
-		} else{
-			for (auto &dest : m_dest) {
-				std::list<FuncSpec> &funcs = dest.second.funcs;
-				std::list<FuncSpec>::iterator j = funcs.begin();
-				while(j != funcs.end()){
-					bool remove = (j->f == f && (!data || j->d == data));
-					if(remove)
-						funcs.erase(j++);
-					else
-						++j;
-				}
-			}
-		}
-	}
-	void reg(MtEventReceiver *r, const char *type)
-	{
-		reg(type, EventManager::receiverReceive, r);
-	}
-	void dereg(MtEventReceiver *r, const char *type)
-	{
-		dereg(type, EventManager::receiverReceive, r);
-	}
-};
diff --git a/src/game.cpp b/src/game.cpp
index 3103d1f2d..9a7f4e6d7 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -34,7 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "clouds.h"
 #include "config.h"
 #include "content_cao.h"
-#include "event_manager.h"
+#include "client/event_manager.h"
 #include "fontengine.h"
 #include "itemdef.h"
 #include "log.h"
@@ -246,9 +246,9 @@ public:
 		p(p),
 		n(n)
 	{}
-	const char *getType() const
+	MtEvent::Type getType() const
 	{
-		return "NodeDug";
+		return MtEvent::NODE_DUG;
 	}
 };
 
@@ -331,14 +331,14 @@ public:
 
 	void registerReceiver(MtEventManager *mgr)
 	{
-		mgr->reg("ViewBobbingStep", SoundMaker::viewBobbingStep, this);
-		mgr->reg("PlayerRegainGround", SoundMaker::playerRegainGround, this);
-		mgr->reg("PlayerJump", SoundMaker::playerJump, this);
-		mgr->reg("CameraPunchLeft", SoundMaker::cameraPunchLeft, this);
-		mgr->reg("CameraPunchRight", SoundMaker::cameraPunchRight, this);
-		mgr->reg("NodeDug", SoundMaker::nodeDug, this);
-		mgr->reg("PlayerDamage", SoundMaker::playerDamage, this);
-		mgr->reg("PlayerFallingDamage", SoundMaker::playerFallingDamage, this);
+		mgr->reg(MtEvent::VIEW_BOBBING_STEP, SoundMaker::viewBobbingStep, this);
+		mgr->reg(MtEvent::PLAYER_REGAIN_GROUND, SoundMaker::playerRegainGround, this);
+		mgr->reg(MtEvent::PLAYER_JUMP, SoundMaker::playerJump, this);
+		mgr->reg(MtEvent::CAMERA_PUNCH_LEFT, SoundMaker::cameraPunchLeft, this);
+		mgr->reg(MtEvent::CAMERA_PUNCH_RIGHT, SoundMaker::cameraPunchRight, this);
+		mgr->reg(MtEvent::NODE_DUG, SoundMaker::nodeDug, this);
+		mgr->reg(MtEvent::PLAYER_DAMAGE, SoundMaker::playerDamage, this);
+		mgr->reg(MtEvent::PLAYER_FALLING_DAMAGE, SoundMaker::playerFallingDamage, this);
 	}
 
 	void step(float dtime)
@@ -2491,15 +2491,15 @@ void Game::handleClientEvent_PlayerDamage(ClientEvent *event, CameraOrientation
 	}
 
 	runData.damage_flash += 95.0 + 3.2 * event->player_damage.amount;
-	runData.damage_flash = MYMIN(runData.damage_flash, 127.0);
+	runData.damage_flash = MYMIN(runData.damage_flash, 127.0f);
 
 	LocalPlayer *player = client->getEnv().getLocalPlayer();
 
 	player->hurt_tilt_timer = 1.5;
 	player->hurt_tilt_strength =
-		rangelim(event->player_damage.amount / 4, 1.0, 4.0);
+		rangelim(event->player_damage.amount / 4, 1.0f, 4.0f);
 
-	client->event()->put(new SimpleTriggerEvent("PlayerDamage"));
+	client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::PLAYER_DAMAGE));
 }
 
 void Game::handleClientEvent_PlayerForceMove(ClientEvent *event, CameraOrientation *cam)
@@ -3586,8 +3586,7 @@ void Game::handleDigging(const PointedThing &pointed, const v3s16 &nodepos,
 
 
 		// Send event to trigger sound
-		MtEvent *e = new NodeDugEvent(nodepos, wasnode);
-		client->event()->put(e);
+		client->getEventManager()->put(new NodeDugEvent(nodepos, wasnode));
 	}
 
 	if (runData.dig_time_complete < 100000.0) {
diff --git a/src/gamedef.h b/src/gamedef.h
index f86eb13cd..bc0ee14c3 100644
--- a/src/gamedef.h
+++ b/src/gamedef.h
@@ -28,7 +28,6 @@ class NodeDefManager;
 class ICraftDefManager;
 class ITextureSource;
 class IShaderSource;
-class MtEventManager;
 class IRollbackManager;
 class EmergeManager;
 class Camera;
@@ -58,8 +57,6 @@ public:
 	// Used for keeping track of names/ids of unknown nodes
 	virtual u16 allocateUnknownNodeId(const std::string &name)=0;
 
-	virtual MtEventManager* getEventManager()=0;
-
 	// Only usable on the server, and NOT thread-safe. It is usable from the
 	// environment thread.
 	virtual IRollbackManager* getRollbackManager() { return NULL; }
@@ -68,8 +65,6 @@ public:
 	IItemDefManager  *idef()     { return getItemDefManager(); }
 	const NodeDefManager  *ndef() { return getNodeDefManager(); }
 	ICraftDefManager *cdef()     { return getCraftDefManager(); }
-
-	MtEventManager   *event()    { return getEventManager(); }
 	IRollbackManager *rollback() { return getRollbackManager(); }
 
 	virtual const std::vector<ModSpec> &getMods() const = 0;
diff --git a/src/localplayer.cpp b/src/localplayer.cpp
index a8bd21839..de200910c 100644
--- a/src/localplayer.cpp
+++ b/src/localplayer.cpp
@@ -417,8 +417,7 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 	*/
 
 	if(!result.standing_on_object && !touching_ground_was && touching_ground) {
-		MtEvent *e = new SimpleTriggerEvent("PlayerRegainGround");
-		m_client->event()->put(e);
+		m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::PLAYER_REGAIN_GROUND));
 
 		// Set camera impact value to be used for view bobbing
 		camera_impact = getSpeed().Y * -1;
@@ -634,9 +633,7 @@ void LocalPlayer::applyControl(float dtime, Environment *env)
 			if(speedJ.Y >= -0.5 * BS) {
 				speedJ.Y = movement_speed_jump * physics_override_jump;
 				setSpeed(speedJ);
-
-				MtEvent *e = new SimpleTriggerEvent("PlayerJump");
-				m_client->event()->put(e);
+				m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::PLAYER_JUMP));
 			}
 		}
 		else if(in_liquid)
@@ -1013,8 +1010,7 @@ void LocalPlayer::old_move(f32 dtime, Environment *env, f32 pos_max_d,
 	}
 
 	if (!result.standing_on_object && !touching_ground_was && touching_ground) {
-		MtEvent *e = new SimpleTriggerEvent("PlayerRegainGround");
-		m_client->event()->put(e);
+		m_client->getEventManager()->put(new SimpleTriggerEvent(MtEvent::PLAYER_REGAIN_GROUND));
 		// Set camera impact value to be used for view bobbing
 		camera_impact = getSpeed().Y * -1;
 	}
diff --git a/src/server.cpp b/src/server.cpp
index ca2743ad2..e0a15ab87 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -50,7 +50,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "content_nodemeta.h"
 #include "content_sao.h"
 #include "mods.h"
-#include "event_manager.h"
 #include "modchannels.h"
 #include "serverlist.h"
 #include "util/string.h"
@@ -168,7 +167,6 @@ Server::Server(
 	m_itemdef(createItemDefManager()),
 	m_nodedef(createNodeDefManager()),
 	m_craftdef(createCraftDefManager()),
-	m_event(new EventManager()),
 	m_uptime(0),
 	m_clients(m_con),
 	m_admin_chat(iface),
@@ -335,7 +333,6 @@ Server::~Server()
 	delete m_env;
 	delete m_rollback;
 	delete m_banmanager;
-	delete m_event;
 	delete m_itemdef;
 	delete m_nodedef;
 	delete m_craftdef;
@@ -3296,11 +3293,6 @@ u16 Server::allocateUnknownNodeId(const std::string &name)
 	return m_nodedef->allocateDummy(name);
 }
 
-MtEventManager *Server::getEventManager()
-{
-	return m_event;
-}
-
 IWritableItemDefManager *Server::getWritableItemDefManager()
 {
 	return m_itemdef;
diff --git a/src/server.h b/src/server.h
index 2d813630c..2442140c8 100644
--- a/src/server.h
+++ b/src/server.h
@@ -263,7 +263,6 @@ public:
 	virtual const NodeDefManager* getNodeDefManager();
 	virtual ICraftDefManager* getCraftDefManager();
 	virtual u16 allocateUnknownNodeId(const std::string &name);
-	virtual MtEventManager* getEventManager();
 	IRollbackManager *getRollbackManager() { return m_rollback; }
 	virtual EmergeManager *getEmergeManager() { return m_emerge; }
 
diff --git a/src/unittest/CMakeLists.txt b/src/unittest/CMakeLists.txt
index aca736f3e..733eabae3 100644
--- a/src/unittest/CMakeLists.txt
+++ b/src/unittest/CMakeLists.txt
@@ -31,6 +31,7 @@ set (UNITTEST_SRCS
 	PARENT_SCOPE)
 
 set (UNITTEST_CLIENT_SRCS
+	${CMAKE_CURRENT_SOURCE_DIR}/test_eventmanager.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_gameui.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_keycode.cpp
 	PARENT_SCOPE)
diff --git a/src/unittest/test.cpp b/src/unittest/test.cpp
index 18215a947..7a0ef16b1 100644
--- a/src/unittest/test.cpp
+++ b/src/unittest/test.cpp
@@ -51,7 +51,6 @@ public:
 	ITextureSource *getTextureSource() { return m_texturesrc; }
 	IShaderSource *getShaderSource() { return m_shadersrc; }
 	ISoundManager *getSoundManager() { return m_soundmgr; }
-	MtEventManager *getEventManager() { return m_eventmgr; }
 	scene::ISceneManager *getSceneManager() { return m_scenemgr; }
 	IRollbackManager *getRollbackManager() { return m_rollbackmgr; }
 	EmergeManager *getEmergeManager() { return m_emergemgr; }
@@ -86,7 +85,6 @@ private:
 	ITextureSource *m_texturesrc = nullptr;
 	IShaderSource *m_shadersrc = nullptr;
 	ISoundManager *m_soundmgr = nullptr;
-	MtEventManager *m_eventmgr = nullptr;
 	scene::ISceneManager *m_scenemgr = nullptr;
 	IRollbackManager *m_rollbackmgr = nullptr;
 	EmergeManager *m_emergemgr = nullptr;
diff --git a/src/unittest/test_eventmanager.cpp b/src/unittest/test_eventmanager.cpp
new file mode 100644
index 000000000..bb0e59336
--- /dev/null
+++ b/src/unittest/test_eventmanager.cpp
@@ -0,0 +1,112 @@
+/*
+Minetest
+Copyright (C) 2018 nerzhul, Loic BLOT <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser 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.
+*/
+
+#include <unordered_map>
+#include "test.h"
+#include "client/event_manager.h"
+
+class TestEventManager : public TestBase
+{
+public:
+	TestEventManager() { TestManager::registerTestModule(this); }
+	const char *getName() override { return "TestEventManager"; }
+
+	void runTests(IGameDef *gamedef) override;
+
+	void testRegister();
+	void testDeregister();
+	void testRealEvent();
+	void testRealEventAfterDereg();
+};
+
+// EventManager test class
+class EventManagerTest : public EventManager
+{
+public:
+	static void eventTest(MtEvent *e, void *data)
+	{
+		UASSERT(e->getType() >= 0);
+		UASSERT(e->getType() < MtEvent::TYPE_MAX);
+		EventManagerTest *emt = (EventManagerTest *)data;
+		emt->m_test_value = e->getType();
+	}
+
+	u64 getTestValue() const { return m_test_value; }
+	void resetValue() { m_test_value = 0; }
+
+private:
+	u64 m_test_value = 0;
+};
+
+static TestEventManager g_test_instance;
+
+void TestEventManager::runTests(IGameDef *gamedef)
+{
+	TEST(testRegister);
+	TEST(testDeregister);
+	TEST(testRealEvent);
+	TEST(testRealEventAfterDereg);
+}
+
+void TestEventManager::testRegister()
+{
+	EventManager ev;
+	ev.reg(MtEvent::PLAYER_DAMAGE, nullptr, nullptr);
+	ev.reg(MtEvent::PLAYER_DAMAGE, nullptr, nullptr);
+}
+
+void TestEventManager::testDeregister()
+{
+	EventManager ev;
+	ev.dereg(MtEvent::NODE_DUG, nullptr, nullptr);
+	ev.reg(MtEvent::PLAYER_DAMAGE, nullptr, nullptr);
+	ev.dereg(MtEvent::PLAYER_DAMAGE, nullptr, nullptr);
+}
+
+void TestEventManager::testRealEvent()
+{
+	EventManager ev;
+	std::unique_ptr<EventManagerTest> emt(new EventManagerTest());
+	ev.reg(MtEvent::PLAYER_REGAIN_GROUND, EventManagerTest::eventTest, emt.get());
+
+	// Put event & verify event value
+	ev.put(new SimpleTriggerEvent(MtEvent::PLAYER_REGAIN_GROUND));
+	UASSERT(emt->getTestValue() == MtEvent::PLAYER_REGAIN_GROUND);
+}
+
+void TestEventManager::testRealEventAfterDereg()
+{
+	EventManager ev;
+	std::unique_ptr<EventManagerTest> emt(new EventManagerTest());
+	ev.reg(MtEvent::PLAYER_REGAIN_GROUND, EventManagerTest::eventTest, emt.get());
+
+	// Put event & verify event value
+	ev.put(new SimpleTriggerEvent(MtEvent::PLAYER_REGAIN_GROUND));
+	UASSERT(emt->getTestValue() == MtEvent::PLAYER_REGAIN_GROUND);
+
+	// Reset internal value
+	emt->resetValue();
+
+	// Remove the registered event
+	ev.dereg(MtEvent::PLAYER_REGAIN_GROUND, EventManagerTest::eventTest, emt.get());
+
+	// Push the new event & ensure we target the default value
+	ev.put(new SimpleTriggerEvent(MtEvent::PLAYER_REGAIN_GROUND));
+	UASSERT(emt->getTestValue() == 0);
+}
\ No newline at end of file