diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a87a247
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+# pytest
+__pycache__/
diff --git a/README.md b/README.md
index 38c95c8..09aad74 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,63 @@
-# galaxy-integrations-python-api
\ No newline at end of file
+# GOG Galaxy - Community Integration - Python API
+
+This document is still work in progress.
+
+## Basic Usage
+
+Basic implementation:
+
+```python
+import sys
+from galaxy.api.plugin import Plugin, create_and_run_plugin
+from galaxy.api.consts import Platform
+
+class PluginExample(Plugin):
+    def __init__(self, reader, writer, token):
+        super().__init__(
+            Platform.Generic, # Choose platform from available list
+            "0.1", # Version
+            reader,
+            writer,
+            token
+        )
+
+    # implement methods
+    async def authenticate(self, stored_credentials=None):
+        pass
+
+def main():
+    create_and_run_plugin(PluginExample, sys.argv)
+
+# run plugin event loop
+if __name__ == "__main__":
+    main()
+```
+
+Plugin should be deployed with manifest:
+```json
+{
+    "name": "Example plugin",
+    "platform": "generic",
+    "guid": "UNIQUE-GUID",
+    "version": "0.1",
+    "description": "Example plugin",
+    "author": "Name",
+    "email": "author@email.com",
+    "url": "https://github.com/user/galaxy-plugin-example",
+    "script": "plugin.py"
+}
+```
+
+## Development
+
+Install required packages:
+```bash
+pip install -r requirements.txt
+```
+
+Run tests:
+```bash
+pytest
+```
+## Methods Documentation
+TODO
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..3d6dc59
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+addopts = --flakes
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..528cc4c
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,8 @@
+-e .
+pytest==4.2.0
+pytest-asyncio==0.10.0
+pytest-mock==1.10.3
+pytest-flakes==4.0.0
+# because of pip bug https://github.com/pypa/pip/issues/4780
+aiohttp==3.5.4
+certifi==2019.3.9
diff --git a/src/galaxy/__init__.py b/src/galaxy/__init__.py
new file mode 100644
index 0000000..69e3be5
--- /dev/null
+++ b/src/galaxy/__init__.py
@@ -0,0 +1 @@
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)
diff --git a/src/galaxy/api/__init__.py b/src/galaxy/api/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/galaxy/api/consts.py b/src/galaxy/api/consts.py
new file mode 100644
index 0000000..a4ad274
--- /dev/null
+++ b/src/galaxy/api/consts.py
@@ -0,0 +1,44 @@
+from enum import Enum, Flag
+
+class Platform(Enum):
+    Unknown = "unknown"
+    Gog = "gog"
+    Steam = "steam"
+    Psn = "psn"
+    XBoxOne = "xboxone"
+    Generic = "generic"
+    Origin = "origin"
+    Uplay = "uplay"
+    Battlenet = "battlenet"
+    Epic = "epic"
+
+class Feature(Enum):
+    Unknown = "Unknown"
+    ImportInstalledGames = "ImportInstalledGames"
+    ImportOwnedGames = "ImportOwnedGames"
+    LaunchGame = "LaunchGame"
+    InstallGame = "InstallGame"
+    UninstallGame = "UninstallGame"
+    ImportAchievements = "ImportAchievements"
+    ImportGameTime = "ImportGameTime"
+    Chat = "Chat"
+    ImportUsers = "ImportUsers"
+    VerifyGame = "VerifyGame"
+    ImportFriends = "ImportFriends"
+
+class LicenseType(Enum):
+    Unknown = "Unknown"
+    SinglePurchase = "SinglePurchase"
+    FreeToPlay = "FreeToPlay"
+    OtherUserLicense = "OtherUserLicense"
+
+class LocalGameState(Flag):
+    None_ = 0
+    Installed = 1
+    Running = 2
+
+class PresenceState(Enum):
+    Unknown = "Unknown"
+    Online = "online"
+    Offline = "offline"
+    Away = "away"
diff --git a/src/galaxy/api/errors.py b/src/galaxy/api/errors.py
new file mode 100644
index 0000000..189db00
--- /dev/null
+++ b/src/galaxy/api/errors.py
@@ -0,0 +1,83 @@
+from galaxy.api.jsonrpc import ApplicationError, UnknownError
+
+UnknownError = UnknownError
+
+class AuthenticationRequired(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(1, "Authentication required", data)
+
+class BackendNotAvailable(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(2, "Backend not available", data)
+
+class BackendTimeout(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(3, "Backend timed out", data)
+
+class BackendError(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(4, "Backend error", data)
+
+class UnknownBackendResponse(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(4, "Backend responded in uknown way", data)
+
+class InvalidCredentials(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(100, "Invalid credentials", data)
+
+class NetworkError(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(101, "Network error", data)
+
+class LoggedInElsewhere(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(102, "Logged in elsewhere", data)
+
+class ProtocolError(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(103, "Protocol error", data)
+
+class TemporaryBlocked(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(104, "Temporary blocked", data)
+
+class Banned(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(105, "Banned", data)
+
+class AccessDenied(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(106, "Access denied", data)
+
+class ParentalControlBlock(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(107, "Parental control block", data)
+
+class DeviceBlocked(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(108, "Device blocked", data)
+
+class RegionBlocked(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(109, "Region blocked", data)
+
+class FailedParsingManifest(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(200, "Failed parsing manifest", data)
+
+class TooManyMessagesSent(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(300, "Too many messages sent", data)
+
+class IncoherentLastMessage(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(400, "Different last message id on backend", data)
+
+class MessageNotFound(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(500, "Message not found", data)
+
+class ImportInProgress(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(600, "Import already in progress", data)
\ No newline at end of file
diff --git a/src/galaxy/api/jsonrpc.py b/src/galaxy/api/jsonrpc.py
new file mode 100644
index 0000000..07290d7
--- /dev/null
+++ b/src/galaxy/api/jsonrpc.py
@@ -0,0 +1,285 @@
+import asyncio
+from collections import namedtuple
+from collections.abc import Iterable
+import logging
+import inspect
+import json
+
+class JsonRpcError(Exception):
+    def __init__(self, code, message, data=None):
+        self.code = code
+        self.message = message
+        self.data = data
+        super().__init__()
+
+    def __eq__(self, other):
+        return self.code == other.code and self.message == other.message and self.data == other.data
+
+class ParseError(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32700, "Parse error")
+
+class InvalidRequest(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32600, "Invalid Request")
+
+class MethodNotFound(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32601, "Method not found")
+
+class InvalidParams(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32602, "Invalid params")
+
+class Timeout(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32000, "Method timed out")
+
+class Aborted(JsonRpcError):
+    def __init__(self):
+        super().__init__(-32001, "Method aborted")
+
+class ApplicationError(JsonRpcError):
+    def __init__(self, code, message, data):
+        if code >= -32768 and code <= -32000:
+            raise ValueError("The error code in reserved range")
+        super().__init__(code, message, data)
+
+class UnknownError(ApplicationError):
+    def __init__(self, data=None):
+        super().__init__(0, "Unknown error", data)
+
+Request = namedtuple("Request", ["method", "params", "id"], defaults=[{}, None])
+Method = namedtuple("Method", ["callback", "signature", "internal", "sensitive_params"])
+
+def anonymise_sensitive_params(params, sensitive_params):
+    anomized_data = "****"
+    if not sensitive_params:
+        return params
+
+    if isinstance(sensitive_params, Iterable):
+        anomized_params = params.copy()
+        for key in anomized_params.keys():
+            if key in sensitive_params:
+                anomized_params[key] = anomized_data
+        return anomized_params
+
+    return anomized_data
+
+class Server():
+    def __init__(self, reader, writer, encoder=json.JSONEncoder()):
+        self._active = True
+        self._reader = reader
+        self._writer = writer
+        self._encoder = encoder
+        self._methods = {}
+        self._notifications = {}
+        self._eof_listeners = []
+
+    def register_method(self, name, callback, internal, sensitive_params=False):
+        """
+        Register method
+        :param name:
+        :param callback:
+        :param internal: if True the callback will be processed immediately (synchronously)
+        :param sensitive_params: list of parameters that will by anonymized before logging; if False - no params
+        are considered sensitive, if True - all params are considered sensitive
+        """
+        self._methods[name] = Method(callback, inspect.signature(callback), internal, sensitive_params)
+
+    def register_notification(self, name, callback, internal, sensitive_params=False):
+        """
+        Register notification
+        :param name:
+        :param callback:
+        :param internal: if True the callback will be processed immediately (synchronously)
+        :param sensitive_params: list of parameters that will by anonymized before logging; if False - no params
+        are considered sensitive, if True - all params are considered sensitive
+        """
+        self._notifications[name] = Method(callback, inspect.signature(callback), internal, sensitive_params)
+
+    def register_eof(self, callback):
+        self._eof_listeners.append(callback)
+
+    async def run(self):
+        while self._active:
+            try:
+                data = await self._reader.readline()
+                if not data:
+                    self._eof()
+                    continue
+            except:
+                self._eof()
+                continue
+            data = data.strip()
+            logging.debug("Received %d bytes of data", len(data))
+            self._handle_input(data)
+
+    def stop(self):
+        self._active = False
+
+    def _eof(self):
+        logging.info("Received EOF")
+        self.stop()
+        for listener in self._eof_listeners:
+            listener()
+
+    def _handle_input(self, data):
+        try:
+            request = self._parse_request(data)
+        except JsonRpcError as error:
+            self._send_error(None, error)
+            return
+
+        if request.id is not None:
+            self._handle_request(request)
+        else:
+            self._handle_notification(request)
+
+    def _handle_notification(self, request):
+        method = self._notifications.get(request.method)
+        if not method:
+            logging.error("Received unknown notification: %s", request.method)
+            return
+
+        callback, signature, internal, sensitive_params = method
+        self._log_request(request, sensitive_params)
+
+        try:
+            bound_args = signature.bind(**request.params)
+        except TypeError:
+            self._send_error(request.id, InvalidParams())
+
+        if internal:
+            # internal requests are handled immediately
+            callback(*bound_args.args, **bound_args.kwargs)
+        else:
+            try:
+                asyncio.create_task(callback(*bound_args.args, **bound_args.kwargs))
+            except Exception:
+                logging.exception("Unexpected exception raised in notification handler")
+
+    def _handle_request(self, request):
+        method = self._methods.get(request.method)
+        if not method:
+            logging.error("Received unknown request: %s", request.method)
+            self._send_error(request.id, MethodNotFound())
+            return
+
+        callback, signature, internal, sensitive_params = method
+        self._log_request(request, sensitive_params)
+
+        try:
+            bound_args = signature.bind(**request.params)
+        except TypeError:
+            self._send_error(request.id, InvalidParams())
+
+        if internal:
+            # internal requests are handled immediately
+            response = callback(*bound_args.args, **bound_args.kwargs)
+            self._send_response(request.id, response)
+        else:
+            async def handle():
+                try:
+                    result = await callback(*bound_args.args, **bound_args.kwargs)
+                    self._send_response(request.id, result)
+                except NotImplementedError:
+                    self._send_error(request.id, MethodNotFound())
+                except JsonRpcError as error:
+                    self._send_error(request.id, error)
+                except Exception as e: #pylint: disable=broad-except
+                    logging.exception("Unexpected exception raised in plugin handler")
+                    self._send_error(request.id, UnknownError(str(e)))
+
+            asyncio.create_task(handle())
+
+    @staticmethod
+    def _parse_request(data):
+        try:
+            jsonrpc_request = json.loads(data, encoding="utf-8")
+            if jsonrpc_request.get("jsonrpc") != "2.0":
+                raise InvalidRequest()
+            del jsonrpc_request["jsonrpc"]
+            return Request(**jsonrpc_request)
+        except json.JSONDecodeError:
+            raise ParseError()
+        except TypeError:
+            raise InvalidRequest()
+
+    def _send(self, data):
+        try:
+            line = self._encoder.encode(data)
+            logging.debug("Sending data: %s", line)
+            data = (line + "\n").encode("utf-8")
+            self._writer.write(data)
+            asyncio.create_task(self._writer.drain())
+        except TypeError as error:
+            logging.error(str(error))
+
+    def _send_response(self, request_id, result):
+        response = {
+            "jsonrpc": "2.0",
+            "id": request_id,
+            "result": result
+        }
+        self._send(response)
+
+    def _send_error(self, request_id, error):
+        response = {
+            "jsonrpc": "2.0",
+            "id": request_id,
+            "error": {
+                "code": error.code,
+                "message": error.message
+            }
+        }
+
+        if error.data is not None:
+            response["error"]["data"] = error.data
+
+        self._send(response)
+
+    @staticmethod
+    def _log_request(request, sensitive_params):
+        params = anonymise_sensitive_params(request.params, sensitive_params)
+        if request.id is not None:
+            logging.info("Handling request: id=%s, method=%s, params=%s", request.id, request.method, params)
+        else:
+            logging.info("Handling notification: method=%s, params=%s", request.method, params)
+
+class NotificationClient():
+    def __init__(self, writer, encoder=json.JSONEncoder()):
+        self._writer = writer
+        self._encoder = encoder
+        self._methods = {}
+
+    def notify(self, method, params, sensitive_params=False):
+        """
+        Send notification
+        :param method:
+        :param params:
+        :param sensitive_params: list of parameters that will by anonymized before logging; if False - no params
+        are considered sensitive, if True - all params are considered sensitive
+        """
+        notification = {
+            "jsonrpc": "2.0",
+            "method": method,
+            "params": params
+        }
+        self._log(method, params, sensitive_params)
+        self._send(notification)
+
+    def _send(self, data):
+        try:
+            line = self._encoder.encode(data)
+            data = (line + "\n").encode("utf-8")
+            logging.debug("Sending %d byte of data", len(data))
+            self._writer.write(data)
+            asyncio.create_task(self._writer.drain())
+        except TypeError as error:
+            logging.error("Failed to parse outgoing message: %s", str(error))
+
+    @staticmethod
+    def _log(method, params, sensitive_params):
+        params = anonymise_sensitive_params(params, sensitive_params)
+        logging.info("Sending notification: method=%s, params=%s", method, params)
diff --git a/src/galaxy/api/plugin.py b/src/galaxy/api/plugin.py
new file mode 100644
index 0000000..db8321a
--- /dev/null
+++ b/src/galaxy/api/plugin.py
@@ -0,0 +1,462 @@
+import asyncio
+import json
+import logging
+import logging.handlers
+import dataclasses
+from enum import Enum
+from collections import OrderedDict
+import sys
+
+from galaxy.api.jsonrpc import Server, NotificationClient
+from galaxy.api.consts import Feature
+from galaxy.api.errors import UnknownError, ImportInProgress
+
+class JSONEncoder(json.JSONEncoder):
+    def default(self, o): # pylint: disable=method-hidden
+        if dataclasses.is_dataclass(o):
+            # filter None values
+            def dict_factory(elements):
+                return {k: v for k, v in elements if v is not None}
+            return dataclasses.asdict(o, dict_factory=dict_factory)
+        if isinstance(o, Enum):
+            return o.value
+        return super().default(o)
+
+class Plugin():
+    def __init__(self, platform, version, reader, writer, handshake_token):
+        logging.info("Creating plugin for platform %s, version %s", platform.value, version)
+        self._platform = platform
+        self._version = version
+
+        self._feature_methods = OrderedDict()
+        self._active = True
+
+        self._reader, self._writer = reader, writer
+        self._handshake_token = handshake_token
+
+        encoder = JSONEncoder()
+        self._server = Server(self._reader, self._writer, encoder)
+        self._notification_client = NotificationClient(self._writer, encoder)
+
+        def eof_handler():
+            self._shutdown()
+        self._server.register_eof(eof_handler)
+
+        self._achievements_import_in_progress = False
+        self._game_times_import_in_progress = False
+
+        # internal
+        self._register_method("shutdown", self._shutdown, internal=True)
+        self._register_method("get_capabilities", self._get_capabilities, internal=True)
+        self._register_method("ping", self._ping, internal=True)
+
+        # implemented by developer
+        self._register_method(
+            "init_authentication",
+            self.authenticate,
+            sensitive_params=["stored_credentials"]
+        )
+        self._register_method(
+            "pass_login_credentials",
+            self.pass_login_credentials,
+            sensitive_params=["cookies", "credentials"]
+        )
+        self._register_method(
+            "import_owned_games",
+            self.get_owned_games,
+            result_name="owned_games",
+            feature=Feature.ImportOwnedGames
+        )
+        self._register_method(
+            "import_unlocked_achievements",
+            self.get_unlocked_achievements,
+            result_name="unlocked_achievements",
+            feature=Feature.ImportAchievements
+        )
+        self._register_method(
+            "start_achievements_import",
+            self.start_achievements_import,
+        )
+        self._register_method(
+            "import_local_games",
+            self.get_local_games,
+            result_name="local_games",
+            feature=Feature.ImportInstalledGames
+        )
+        self._register_notification("launch_game", self.launch_game, feature=Feature.LaunchGame)
+        self._register_notification("install_game", self.install_game, feature=Feature.InstallGame)
+        self._register_notification(
+            "uninstall_game",
+            self.uninstall_game,
+            feature=Feature.UninstallGame
+        )
+        self._register_method(
+            "import_friends",
+            self.get_friends,
+            result_name="friend_info_list",
+            feature=Feature.ImportFriends
+        )
+        self._register_method(
+            "import_user_infos",
+            self.get_users,
+            result_name="user_info_list",
+            feature=Feature.ImportUsers
+        )
+        self._register_method(
+            "send_message",
+            self.send_message,
+            feature=Feature.Chat
+        )
+        self._register_method(
+            "mark_as_read",
+            self.mark_as_read,
+            feature=Feature.Chat
+        )
+        self._register_method(
+            "import_rooms",
+            self.get_rooms,
+            result_name="rooms",
+            feature=Feature.Chat
+        )
+        self._register_method(
+            "import_room_history_from_message",
+            self.get_room_history_from_message,
+            result_name="messages",
+            feature=Feature.Chat
+        )
+        self._register_method(
+            "import_room_history_from_timestamp",
+            self.get_room_history_from_timestamp,
+            result_name="messages",
+            feature=Feature.Chat
+        )
+        self._register_method(
+            "import_game_times",
+            self.get_game_times,
+            result_name="game_times",
+            feature=Feature.ImportGameTime
+        )
+        self._register_method(
+            "start_game_times_import",
+            self.start_game_times_import,
+        )
+
+    @property
+    def features(self):
+        features = []
+        if self.__class__ != Plugin:
+            for feature, handlers in self._feature_methods.items():
+                if self._implements(handlers):
+                    features.append(feature)
+
+        return features
+
+    def _implements(self, handlers):
+        for handler in handlers:
+            if handler.__name__ not in self.__class__.__dict__:
+                return False
+        return True
+
+    def _register_method(self, name, handler, result_name=None, internal=False, sensitive_params=False, feature=None):
+        if internal:
+            def method(*args, **kwargs):
+                result = handler(*args, **kwargs)
+                if result_name:
+                    result = {
+                        result_name: result
+                    }
+                return result
+            self._server.register_method(name, method, True, sensitive_params)
+        else:
+            async def method(*args, **kwargs):
+                result = await handler(*args, **kwargs)
+                if result_name:
+                    result = {
+                        result_name: result
+                    }
+                return result
+            self._server.register_method(name, method, False, sensitive_params)
+
+        if feature is not None:
+            self._feature_methods.setdefault(feature, []).append(handler)
+
+    def _register_notification(self, name, handler, internal=False, sensitive_params=False, feature=None):
+        self._server.register_notification(name, handler, internal, sensitive_params)
+
+        if feature is not None:
+            self._feature_methods.setdefault(feature, []).append(handler)
+
+    async def run(self):
+        """Plugin main coorutine"""
+        async def pass_control():
+            while self._active:
+                try:
+                    self.tick()
+                except Exception:
+                    logging.exception("Unexpected exception raised in plugin tick")
+                await asyncio.sleep(1)
+
+        await asyncio.gather(pass_control(), self._server.run())
+
+    def _shutdown(self):
+        logging.info("Shuting down")
+        self._server.stop()
+        self._active = False
+        self.shutdown()
+
+    def _get_capabilities(self):
+        return {
+            "platform_name": self._platform,
+            "features": self.features,
+            "token": self._handshake_token
+        }
+
+    @staticmethod
+    def _ping():
+        pass
+
+    # notifications
+    def store_credentials(self, credentials):
+        """Notify client to store plugin credentials.
+        They will be pass to next authencicate calls.
+        """
+        self._notification_client.notify("store_credentials", credentials, sensitive_params=True)
+
+    def add_game(self, game):
+        params = {"owned_game" : game}
+        self._notification_client.notify("owned_game_added", params)
+
+    def remove_game(self, game_id):
+        params = {"game_id" : game_id}
+        self._notification_client.notify("owned_game_removed", params)
+
+    def update_game(self, game):
+        params = {"owned_game" : game}
+        self._notification_client.notify("owned_game_updated", params)
+
+    def unlock_achievement(self, game_id, achievement):
+        params = {
+            "game_id": game_id,
+            "achievement": achievement
+        }
+        self._notification_client.notify("achievement_unlocked", params)
+
+    def game_achievements_import_success(self, game_id, achievements):
+        params = {
+            "game_id": game_id,
+            "unlocked_achievements": achievements
+        }
+        self._notification_client.notify("game_achievements_import_success", params)
+
+    def game_achievements_import_failure(self, game_id, error):
+        params = {
+            "game_id": game_id,
+            "error": {
+                "code": error.code,
+                "message": error.message
+            }
+        }
+        self._notification_client.notify("game_achievements_import_failure", params)
+
+    def achievements_import_finished(self):
+        self._notification_client.notify("achievements_import_finished", None)
+
+    def update_local_game_status(self, local_game):
+        params = {"local_game" : local_game}
+        self._notification_client.notify("local_game_status_changed", params)
+
+    def add_friend(self, user):
+        params = {"friend_info" : user}
+        self._notification_client.notify("friend_added", params)
+
+    def remove_friend(self, user_id):
+        params = {"user_id" : user_id}
+        self._notification_client.notify("friend_removed", params)
+
+    def update_room(self, room_id, unread_message_count=None, new_messages=None):
+        params = {"room_id": room_id}
+        if unread_message_count is not None:
+            params["unread_message_count"] = unread_message_count
+        if new_messages is not None:
+            params["messages"] = new_messages
+        self._notification_client.notify("chat_room_updated", params)
+
+    def update_game_time(self, game_time):
+        params = {"game_time" : game_time}
+        self._notification_client.notify("game_time_updated", params)
+
+    def game_time_import_success(self, game_time):
+        params = {"game_time" : game_time}
+        self._notification_client.notify("game_time_import_success", params)
+
+    def game_time_import_failure(self, game_id, error):
+        params = {
+            "game_id": game_id,
+            "error": {
+                "code": error.code,
+                "message": error.message
+            }
+        }
+        self._notification_client.notify("game_time_import_failure", params)
+
+    def game_times_import_finished(self):
+        self._notification_client.notify("game_times_import_finished", None)
+
+    def lost_authentication(self):
+        self._notification_client.notify("authentication_lost", None)
+
+    # handlers
+    def tick(self):
+        """This method is called periodicaly.
+        Override it to implement periodical tasks like refreshing cache.
+        This method should not be blocking - any longer actions should be
+        handled by asycio tasks.
+        """
+
+    def shutdown(self):
+        """This method is called on plugin shutdown.
+        Override it to implement tear down.
+        """
+
+    # methods
+    async def authenticate(self, stored_credentials=None):
+        """Overide this method to handle plugin authentication.
+        The method should return galaxy.api.types.Authentication
+        or raise galaxy.api.types.LoginError on authentication failure.
+        """
+        raise NotImplementedError()
+
+    async def pass_login_credentials(self, step, credentials, cookies):
+        raise NotImplementedError()
+
+    async def get_owned_games(self):
+        raise NotImplementedError()
+
+    async def get_unlocked_achievements(self, game_id):
+        raise NotImplementedError()
+
+    async def start_achievements_import(self, game_ids):
+        if self._achievements_import_in_progress:
+            raise ImportInProgress()
+
+        async def import_games_achievements_task(game_ids):
+            try:
+                await self.import_games_achievements(game_ids)
+            finally:
+                self.achievements_import_finished()
+                self._achievements_import_in_progress = False
+
+        asyncio.create_task(import_games_achievements_task(game_ids))
+        self._achievements_import_in_progress = True
+
+    async def import_games_achievements(self, game_ids):
+        """Call game_achievements_import_success/game_achievements_import_failure for each game_id on the list"""
+        async def import_game_achievements(game_id):
+            try:
+                achievements = await self.get_unlocked_achievements(game_id)
+                self.game_achievements_import_success(game_id, achievements)
+            except Exception as error:
+                self.game_achievements_import_failure(game_id, error)
+
+        imports = [import_game_achievements(game_id) for game_id in game_ids]
+        await asyncio.gather(*imports)
+
+    async def get_local_games(self):
+        raise NotImplementedError()
+
+    async def launch_game(self, game_id):
+        raise NotImplementedError()
+
+    async def install_game(self, game_id):
+        raise NotImplementedError()
+
+    async def uninstall_game(self, game_id):
+        raise NotImplementedError()
+
+    async def get_friends(self):
+        raise NotImplementedError()
+
+    async def get_users(self, user_id_list):
+        raise NotImplementedError()
+
+    async def send_message(self, room_id, message_text):
+        raise NotImplementedError()
+
+    async def mark_as_read(self, room_id, last_message_id):
+        raise NotImplementedError()
+
+    async def get_rooms(self):
+        raise NotImplementedError()
+
+    async def get_room_history_from_message(self, room_id, message_id):
+        raise NotImplementedError()
+
+    async def get_room_history_from_timestamp(self, room_id, from_timestamp):
+        raise NotImplementedError()
+
+    async def get_game_times(self):
+        raise NotImplementedError()
+
+    async def start_game_times_import(self, game_ids):
+        if self._game_times_import_in_progress:
+            raise ImportInProgress()
+
+        async def import_game_times_task(game_ids):
+            try:
+                await self.import_game_times(game_ids)
+            finally:
+                self.game_times_import_finished()
+                self._game_times_import_in_progress = False
+
+        asyncio.create_task(import_game_times_task(game_ids))
+        self._game_times_import_in_progress = True
+
+    async def import_game_times(self, game_ids):
+        """Call game_time_import_success/game_time_import_failure for each game_id on the list"""
+        try:
+            game_times = await self.get_game_times()
+            game_ids_set = set(game_ids)
+            for game_time in game_times:
+                if game_time.game_id not in game_ids_set:
+                    continue
+                self.game_time_import_success(game_time)
+                game_ids_set.discard(game_time.game_id)
+            for game_id in game_ids_set:
+                self.game_time_import_failure(game_id, UnknownError())
+        except Exception as error:
+            for game_id in game_ids:
+                self.game_time_import_failure(game_id, error)
+
+def create_and_run_plugin(plugin_class, argv):
+    if len(argv) < 3:
+        logging.critical("Not enough parameters, required: token, port")
+        sys.exit(1)
+
+    token = argv[1]
+
+    try:
+        port = int(argv[2])
+    except ValueError:
+        logging.critical("Failed to parse port value: %s", argv[2])
+        sys.exit(2)
+
+    if not (1 <= port <= 65535):
+        logging.critical("Port value out of range (1, 65535)")
+        sys.exit(3)
+
+    if not issubclass(plugin_class, Plugin):
+        logging.critical("plugin_class must be subclass of Plugin")
+        sys.exit(4)
+
+    async def coroutine():
+        reader, writer = await asyncio.open_connection("127.0.0.1", port)
+        extra_info = writer.get_extra_info('sockname')
+        logging.info("Using local address: %s:%u", *extra_info)
+        plugin = plugin_class(reader, writer, token)
+        await plugin.run()
+
+    try:
+        asyncio.run(coroutine())
+    except Exception:
+        logging.exception("Error while running plugin")
+        sys.exit(5)
diff --git a/src/galaxy/api/types.py b/src/galaxy/api/types.py
new file mode 100644
index 0000000..746f3a3
--- /dev/null
+++ b/src/galaxy/api/types.py
@@ -0,0 +1,94 @@
+from dataclasses import dataclass
+from typing import List, Dict, Optional
+
+from galaxy.api.consts import LicenseType, LocalGameState, PresenceState
+
+@dataclass
+class Authentication():
+    user_id: str
+    user_name: str
+
+@dataclass
+class Cookie():
+    name: str
+    value: str
+    domain: Optional[str] = None
+    path: Optional[str] = None
+
+@dataclass
+class NextStep():
+    next_step: str
+    auth_params: Dict[str, str]
+    cookies: Optional[List[Cookie]] = None
+    js: Optional[Dict[str, List[str]]] = None
+
+@dataclass
+class LicenseInfo():
+    license_type: LicenseType
+    owner: Optional[str] = None
+
+@dataclass
+class Dlc():
+    dlc_id: str
+    dlc_title: str
+    license_info: LicenseInfo
+
+@dataclass
+class Game():
+    game_id: str
+    game_title: str
+    dlcs: Optional[List[Dlc]]
+    license_info: LicenseInfo
+
+@dataclass
+class Achievement():
+    unlock_time: int
+    achievement_id: Optional[str] = None
+    achievement_name: Optional[str] = None
+
+    def __post_init__(self):
+        assert self.achievement_id or self.achievement_name, \
+            "One of achievement_id or achievement_name is required"
+
+@dataclass
+class LocalGame():
+    game_id: str
+    local_game_state: LocalGameState
+
+@dataclass
+class Presence():
+    presence_state: PresenceState
+    game_id: Optional[str] = None
+    presence_status: Optional[str] = None
+
+@dataclass
+class UserInfo():
+    user_id: str
+    is_friend: bool
+    user_name: str
+    avatar_url: str
+    presence: Presence
+
+@dataclass
+class FriendInfo():
+    user_id: str
+    user_name: str
+
+@dataclass
+class Room():
+    room_id: str
+    unread_message_count: int
+    last_message_id: str
+
+@dataclass
+class Message():
+    message_id: str
+    sender_id: str
+    sent_time: int
+    message_text: str
+
+@dataclass
+class GameTime():
+    game_id: str
+    time_played: int
+    last_played_time: int
diff --git a/src/galaxy/http.py b/src/galaxy/http.py
new file mode 100644
index 0000000..5b494ca
--- /dev/null
+++ b/src/galaxy/http.py
@@ -0,0 +1,47 @@
+import asyncio
+import ssl
+from http import HTTPStatus
+
+import aiohttp
+import certifi
+
+from galaxy.api.errors import (
+    AccessDenied, AuthenticationRequired,
+    BackendTimeout, BackendNotAvailable, BackendError, NetworkError, UnknownBackendResponse, UnknownError
+)
+
+class HttpClient:
+    def __init__(self, limit=20, timeout=aiohttp.ClientTimeout(total=60), cookie_jar=None):
+        ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+        ssl_context.load_verify_locations(certifi.where())
+        connector = aiohttp.TCPConnector(limit=limit, ssl=ssl_context)
+        self._session = aiohttp.ClientSession(connector=connector, timeout=timeout, cookie_jar=cookie_jar)
+
+    async def close(self):
+        await self._session.close()
+
+    async def request(self, method, *args, **kwargs):
+        try:
+            response = await self._session.request(method, *args, **kwargs)
+        except asyncio.TimeoutError:
+            raise BackendTimeout()
+        except aiohttp.ServerDisconnectedError:
+            raise BackendNotAvailable()
+        except aiohttp.ClientConnectionError:
+            raise NetworkError()
+        except aiohttp.ContentTypeError:
+            raise UnknownBackendResponse()
+        except aiohttp.ClientError:
+            raise UnknownError()
+        if response.status == HTTPStatus.UNAUTHORIZED:
+            raise AuthenticationRequired()
+        if response.status == HTTPStatus.FORBIDDEN:
+            raise AccessDenied()
+        if response.status == HTTPStatus.SERVICE_UNAVAILABLE:
+            raise BackendNotAvailable()
+        if response.status >= 500:
+            raise BackendError()
+        if response.status >= 400:
+            raise UnknownError()
+
+        return response
diff --git a/src/galaxy/tools.py b/src/galaxy/tools.py
new file mode 100644
index 0000000..3996d25
--- /dev/null
+++ b/src/galaxy/tools.py
@@ -0,0 +1,20 @@
+import io
+import os
+import zipfile
+from glob import glob
+
+def zip_folder(folder):
+    files = glob(os.path.join(folder, "**"), recursive=True)
+    files = [file.replace(folder + os.sep, "") for file in files]
+    files = [file for file in files if file]
+
+    zip_buffer = io.BytesIO()
+    with zipfile.ZipFile(zip_buffer, mode="w", compression=zipfile.ZIP_DEFLATED) as zipf:
+        for file in files:
+            zipf.write(os.path.join(folder, file), arcname=file)
+    return zip_buffer
+
+def zip_folder_to_file(folder, filename):
+    zip_content = zip_folder(folder).getbuffer()
+    with open(filename, "wb") as archive:
+        archive.write(zip_content)
diff --git a/src/galaxy/unittest/__init__.py b/src/galaxy/unittest/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/galaxy/unittest/mock.py b/src/galaxy/unittest/mock.py
new file mode 100644
index 0000000..264c3fa
--- /dev/null
+++ b/src/galaxy/unittest/mock.py
@@ -0,0 +1,12 @@
+from asyncio import coroutine
+from unittest.mock import MagicMock
+
+class AsyncMock(MagicMock):
+    async def __call__(self, *args, **kwargs):
+        return super(AsyncMock, self).__call__(*args, **kwargs)
+
+def coroutine_mock():
+    coro = MagicMock(name="CoroutineResult")
+    corofunc = MagicMock(name="CoroutineFunction", side_effect=coroutine(coro))
+    corofunc.coro = coro
+    return corofunc
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..fed2e87
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,67 @@
+from contextlib import ExitStack
+import logging
+from unittest.mock import patch, MagicMock
+
+import pytest
+
+from galaxy.api.plugin import Plugin
+from galaxy.api.consts import Platform
+from galaxy.unittest.mock import AsyncMock, coroutine_mock
+
+@pytest.fixture()
+def reader():
+    stream = MagicMock(name="stream_reader")
+    stream.readline = AsyncMock()
+    yield stream
+
+@pytest.fixture()
+def writer():
+    stream = MagicMock(name="stream_writer")
+    stream.write = MagicMock()
+    stream.drain = AsyncMock()
+    yield stream
+
+@pytest.fixture()
+def readline(reader):
+    yield reader.readline
+
+@pytest.fixture()
+def write(writer):
+    yield writer.write
+
+@pytest.fixture()
+def plugin(reader, writer):
+    """Return plugin instance with all feature methods mocked"""
+    async_methods = (
+        "authenticate",
+        "get_owned_games",
+        "get_unlocked_achievements",
+        "get_local_games",
+        "launch_game",
+        "install_game",
+        "uninstall_game",
+        "get_friends",
+        "get_users",
+        "send_message",
+        "mark_as_read",
+        "get_rooms",
+        "get_room_history_from_message",
+        "get_room_history_from_timestamp",
+        "get_game_times"
+    )
+
+    methods = (
+        "shutdown",
+        "tick"
+    )
+
+    with ExitStack() as stack:
+        for method in async_methods:
+            stack.enter_context(patch.object(Plugin, method, new_callable=coroutine_mock))
+        for method in methods:
+            stack.enter_context(patch.object(Plugin, method))
+        yield Plugin(Platform.Generic, "0.1", reader, writer, "token")
+
+@pytest.fixture(autouse=True)
+def my_caplog(caplog):
+    caplog.set_level(logging.DEBUG)
diff --git a/tests/test_achievements.py b/tests/test_achievements.py
new file mode 100644
index 0000000..84421bd
--- /dev/null
+++ b/tests/test_achievements.py
@@ -0,0 +1,193 @@
+import asyncio
+import json
+from unittest.mock import call
+
+import pytest
+from pytest import raises
+
+from galaxy.api.types import Achievement
+from galaxy.api.errors import UnknownError, ImportInProgress, BackendError
+
+def test_initialization_no_unlock_time():
+    with raises(Exception):
+        Achievement(achievement_id="lvl30", achievement_name="Got level 30")
+
+def test_initialization_no_id_nor_name():
+    with raises(AssertionError):
+        Achievement(unlock_time=1234567890)
+
+def test_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_unlocked_achievements",
+        "params": {
+            "game_id": "14"
+        }
+    }
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_unlocked_achievements.coro.return_value = [
+        Achievement(achievement_id="lvl10", unlock_time=1548421241),
+        Achievement(achievement_name="Got level 20", unlock_time=1548422395),
+        Achievement(achievement_id="lvl30", achievement_name="Got level 30", unlock_time=1548495633)
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_unlocked_achievements.assert_called_with(game_id="14")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "unlocked_achievements": [
+                {
+                    "achievement_id": "lvl10",
+                    "unlock_time": 1548421241
+                },
+                {
+                    "achievement_name": "Got level 20",
+                    "unlock_time": 1548422395
+                },
+                {
+                    "achievement_id": "lvl30",
+                    "achievement_name": "Got level 30",
+                    "unlock_time": 1548495633
+                }
+            ]
+        }
+    }
+
+def test_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_unlocked_achievements",
+        "params": {
+            "game_id": "14"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_unlocked_achievements.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_unlocked_achievements.assert_called()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": 0,
+            "message": "Unknown error"
+        }
+    }
+
+def test_unlock_achievement(plugin, write):
+    achievement = Achievement(achievement_id="lvl20", unlock_time=1548422395)
+
+    async def couritine():
+        plugin.unlock_achievement("14", achievement)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "achievement_unlocked",
+        "params": {
+            "game_id": "14",
+            "achievement": {
+                "achievement_id": "lvl20",
+                "unlock_time": 1548422395
+            }
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_game_achievements_import_success(plugin, write):
+    achievements = [
+        Achievement(achievement_id="lvl10", unlock_time=1548421241),
+        Achievement(achievement_name="Got level 20", unlock_time=1548422395)
+    ]
+    plugin.game_achievements_import_success("134", achievements)
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_achievements_import_success",
+        "params": {
+            "game_id": "134",
+            "unlocked_achievements": [
+                {
+                    "achievement_id": "lvl10",
+                    "unlock_time": 1548421241
+                },
+                {
+                    "achievement_name": "Got level 20",
+                    "unlock_time": 1548422395
+                }
+            ]
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_game_achievements_import_failure(plugin, write):
+    plugin.game_achievements_import_failure("134", ImportInProgress())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_achievements_import_failure",
+        "params": {
+            "game_id": "134",
+            "error": {
+                "code": 600,
+                "message": "Import already in progress"
+            }
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_achievements_import_finished(plugin, write):
+    plugin.achievements_import_finished()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "achievements_import_finished",
+        "params": None
+    }
+
+@pytest.mark.asyncio
+async def test_start_achievements_import(plugin, write, mocker):
+    game_achievements_import_success = mocker.patch.object(plugin, "game_achievements_import_success")
+    game_achievements_import_failure = mocker.patch.object(plugin, "game_achievements_import_failure")
+    achievements_import_finished = mocker.patch.object(plugin, "achievements_import_finished")
+
+    game_ids = ["1", "5", "9"]
+    error = BackendError()
+    achievements = [
+        Achievement(achievement_id="lvl10", unlock_time=1548421241),
+        Achievement(achievement_name="Got level 20", unlock_time=1548422395)
+    ]
+    plugin.get_unlocked_achievements.coro.side_effect = [
+        achievements,
+        [],
+        error
+    ]
+    await plugin.start_achievements_import(game_ids)
+
+    with pytest.raises(ImportInProgress):
+        await plugin.start_achievements_import(["4", "8"])
+
+    # wait until all tasks are finished
+    for _ in range(4):
+        await asyncio.sleep(0)
+
+    plugin.get_unlocked_achievements.coro.assert_has_calls([call("1"), call("5"), call("9")])
+    game_achievements_import_success.assert_has_calls([
+        call("1", achievements),
+        call("5", [])
+    ])
+    game_achievements_import_failure.assert_called_once_with("9", error)
+    achievements_import_finished.assert_called_once_with()
diff --git a/tests/test_authenticate.py b/tests/test_authenticate.py
new file mode 100644
index 0000000..4c25ba5
--- /dev/null
+++ b/tests/test_authenticate.py
@@ -0,0 +1,119 @@
+import asyncio
+import json
+
+import pytest
+
+from galaxy.api.types import Authentication
+from galaxy.api.errors import (
+    UnknownError, InvalidCredentials, NetworkError, LoggedInElsewhere, ProtocolError,
+    BackendNotAvailable, BackendTimeout, BackendError, TemporaryBlocked, Banned, AccessDenied,
+    ParentalControlBlock, DeviceBlocked, RegionBlocked
+)
+
+def test_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "init_authentication"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.authenticate.coro.return_value = Authentication("132", "Zenek")
+    asyncio.run(plugin.run())
+    plugin.authenticate.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "user_id": "132",
+            "user_name": "Zenek"
+        }
+    }
+
+@pytest.mark.parametrize("error,code,message", [
+    pytest.param(UnknownError, 0, "Unknown error", id="unknown_error"),
+    pytest.param(BackendNotAvailable, 2, "Backend not available", id="backend_not_available"),
+    pytest.param(BackendTimeout, 3, "Backend timed out", id="backend_timeout"),
+    pytest.param(BackendError, 4, "Backend error", id="backend_error"),
+    pytest.param(InvalidCredentials, 100, "Invalid credentials", id="invalid_credentials"),
+    pytest.param(NetworkError, 101, "Network error", id="network_error"),
+    pytest.param(LoggedInElsewhere, 102, "Logged in elsewhere", id="logged_elsewhere"),
+    pytest.param(ProtocolError, 103, "Protocol error", id="protocol_error"),
+    pytest.param(TemporaryBlocked, 104, "Temporary blocked", id="temporary_blocked"),
+    pytest.param(Banned, 105, "Banned", id="banned"),
+    pytest.param(AccessDenied, 106, "Access denied", id="access_denied"),
+    pytest.param(ParentalControlBlock, 107, "Parental control block", id="parental_control_clock"),
+    pytest.param(DeviceBlocked, 108, "Device blocked", id="device_blocked"),
+    pytest.param(RegionBlocked, 109, "Region blocked", id="region_blocked")
+])
+def test_failure(plugin, readline, write, error, code, message):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "init_authentication"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.authenticate.coro.side_effect = error()
+    asyncio.run(plugin.run())
+    plugin.authenticate.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": code,
+            "message": message
+        }
+    }
+
+def test_stored_credentials(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "init_authentication",
+        "params": {
+            "stored_credentials": {
+                "token": "ABC"
+            }
+        }
+    }
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.authenticate.coro.return_value = Authentication("132", "Zenek")
+    asyncio.run(plugin.run())
+    plugin.authenticate.assert_called_with(stored_credentials={"token": "ABC"})
+    write.assert_called()
+
+def test_store_credentials(plugin, write):
+    credentials = {
+        "token": "ABC"
+    }
+
+    async def couritine():
+        plugin.store_credentials(credentials)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "store_credentials",
+        "params": credentials
+    }
+
+def test_lost_authentication(plugin, readline, write):
+
+    async def couritine():
+        plugin.lost_authentication()
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "authentication_lost",
+        "params": None
+    }
diff --git a/tests/test_chat.py b/tests/test_chat.py
new file mode 100644
index 0000000..97dad89
--- /dev/null
+++ b/tests/test_chat.py
@@ -0,0 +1,354 @@
+import asyncio
+import json
+
+import pytest
+
+from galaxy.api.types import Room, Message
+from galaxy.api.errors import (
+    UnknownError, AuthenticationRequired, BackendNotAvailable, BackendTimeout, BackendError,
+    TooManyMessagesSent, IncoherentLastMessage, MessageNotFound
+)
+
+def test_send_message_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "send_message",
+        "params": {
+            "room_id": "14",
+            "message": "Hello!"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.send_message.coro.return_value = None
+    asyncio.run(plugin.run())
+    plugin.send_message.assert_called_with(room_id="14", message="Hello!")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": None
+    }
+
+@pytest.mark.parametrize("error,code,message", [
+    pytest.param(UnknownError, 0, "Unknown error", id="unknown_error"),
+    pytest.param(AuthenticationRequired, 1, "Authentication required", id="not_authenticated"),
+    pytest.param(BackendNotAvailable, 2, "Backend not available", id="backend_not_available"),
+    pytest.param(BackendTimeout, 3, "Backend timed out", id="backend_timeout"),
+    pytest.param(BackendError, 4, "Backend error", id="backend_error"),
+    pytest.param(TooManyMessagesSent, 300, "Too many messages sent", id="too_many_messages")
+])
+def test_send_message_failure(plugin, readline, write, error, code, message):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "6",
+        "method": "send_message",
+        "params": {
+            "room_id": "15",
+            "message": "Bye"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.send_message.coro.side_effect = error()
+    asyncio.run(plugin.run())
+    plugin.send_message.assert_called_with(room_id="15", message="Bye")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "6",
+        "error": {
+            "code": code,
+            "message": message
+        }
+    }
+
+def test_mark_as_read_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "method": "mark_as_read",
+        "params": {
+            "room_id": "14",
+            "last_message_id": "67"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.mark_as_read.coro.return_value = None
+    asyncio.run(plugin.run())
+    plugin.mark_as_read.assert_called_with(room_id="14", last_message_id="67")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "result": None
+    }
+
+@pytest.mark.parametrize("error,code,message", [
+    pytest.param(UnknownError, 0, "Unknown error", id="unknown_error"),
+    pytest.param(AuthenticationRequired, 1, "Authentication required", id="not_authenticated"),
+    pytest.param(BackendNotAvailable, 2, "Backend not available", id="backend_not_available"),
+    pytest.param(BackendTimeout, 3, "Backend timed out", id="backend_timeout"),
+    pytest.param(BackendError, 4, "Backend error", id="backend_error"),
+    pytest.param(
+        IncoherentLastMessage,
+        400,
+        "Different last message id on backend",
+        id="incoherent_last_message"
+    )
+])
+def test_mark_as_read_failure(plugin, readline, write, error, code, message):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "4",
+        "method": "mark_as_read",
+        "params": {
+            "room_id": "18",
+            "last_message_id": "7"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.mark_as_read.coro.side_effect = error()
+    asyncio.run(plugin.run())
+    plugin.mark_as_read.assert_called_with(room_id="18", last_message_id="7")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "4",
+        "error": {
+            "code": code,
+            "message": message
+        }
+    }
+
+def test_get_rooms_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "2",
+        "method": "import_rooms"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_rooms.coro.return_value = [
+        Room("13", 0, None),
+        Room("15", 34, "8")
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_rooms.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "2",
+        "result": {
+            "rooms": [
+                {
+                    "room_id": "13",
+                    "unread_message_count": 0,
+                },
+                {
+                    "room_id": "15",
+                    "unread_message_count": 34,
+                    "last_message_id": "8"
+                }
+            ]
+        }
+    }
+
+def test_get_rooms_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "9",
+        "method": "import_rooms"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_rooms.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_rooms.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "9",
+        "error": {
+            "code": 0,
+            "message": "Unknown error"
+        }
+    }
+
+def test_get_room_history_from_message_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "2",
+        "method": "import_room_history_from_message",
+        "params": {
+            "room_id": "34",
+            "message_id": "66"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_room_history_from_message.coro.return_value = [
+        Message("13", "149", 1549454837, "Hello"),
+        Message("14", "812", 1549454899, "Hi")
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_room_history_from_message.assert_called_with(room_id="34", message_id="66")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "2",
+        "result": {
+            "messages": [
+                {
+                    "message_id": "13",
+                    "sender_id": "149",
+                    "sent_time": 1549454837,
+                    "message_text": "Hello"
+                },
+                {
+                    "message_id": "14",
+                    "sender_id": "812",
+                    "sent_time": 1549454899,
+                    "message_text": "Hi"
+                }
+            ]
+        }
+    }
+
+@pytest.mark.parametrize("error,code,message", [
+    pytest.param(UnknownError, 0, "Unknown error", id="unknown_error"),
+    pytest.param(AuthenticationRequired, 1, "Authentication required", id="not_authenticated"),
+    pytest.param(BackendNotAvailable, 2, "Backend not available", id="backend_not_available"),
+    pytest.param(BackendTimeout, 3, "Backend timed out", id="backend_timeout"),
+    pytest.param(BackendError, 4, "Backend error", id="backend_error"),
+    pytest.param(MessageNotFound, 500, "Message not found", id="message_not_found")
+])
+def test_get_room_history_from_message_failure(plugin, readline, write, error, code, message):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "method": "import_room_history_from_message",
+        "params": {
+            "room_id": "33",
+            "message_id": "88"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_room_history_from_message.coro.side_effect = error()
+    asyncio.run(plugin.run())
+    plugin.get_room_history_from_message.assert_called_with(room_id="33", message_id="88")
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "error": {
+            "code": code,
+            "message": message
+        }
+    }
+
+def test_get_room_history_from_timestamp_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "method": "import_room_history_from_timestamp",
+        "params": {
+            "room_id": "12",
+            "from_timestamp": 1549454835
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_room_history_from_timestamp.coro.return_value = [
+        Message("12", "155", 1549454836, "Bye")
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_room_history_from_timestamp.assert_called_with(
+        room_id="12",
+        from_timestamp=1549454835
+    )
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "result": {
+            "messages": [
+                {
+                    "message_id": "12",
+                    "sender_id": "155",
+                    "sent_time": 1549454836,
+                    "message_text": "Bye"
+                }
+            ]
+        }
+    }
+
+def test_get_room_history_from_timestamp_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_room_history_from_timestamp",
+        "params": {
+            "room_id": "10",
+            "from_timestamp": 1549454800
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_room_history_from_timestamp.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_room_history_from_timestamp.assert_called_with(
+        room_id="10",
+        from_timestamp=1549454800
+    )
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": 0,
+            "message": "Unknown error"
+        }
+    }
+
+def test_update_room(plugin, write):
+    messages = [
+        Message("10", "898", 1549454832, "Hi")
+    ]
+
+    async def couritine():
+        plugin.update_room("14", 15, messages)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "chat_room_updated",
+        "params": {
+            "room_id": "14",
+            "unread_message_count": 15,
+            "messages": [
+                {
+                    "message_id": "10",
+                    "sender_id": "898",
+                    "sent_time": 1549454832,
+                    "message_text": "Hi"
+                }
+            ]
+        }
+    }
diff --git a/tests/test_features.py b/tests/test_features.py
new file mode 100644
index 0000000..7f11c17
--- /dev/null
+++ b/tests/test_features.py
@@ -0,0 +1,45 @@
+from galaxy.api.plugin import Plugin
+from galaxy.api.consts import Platform, Feature
+
+def test_base_class():
+    plugin = Plugin(Platform.Generic, "0.1", None, None, None)
+    assert plugin.features == []
+
+def test_no_overloads():
+    class PluginImpl(Plugin): #pylint: disable=abstract-method
+        pass
+
+    plugin = PluginImpl(Platform.Generic, "0.1", None, None, None)
+    assert plugin.features == []
+
+def test_one_method_feature():
+    class PluginImpl(Plugin): #pylint: disable=abstract-method
+        async def get_owned_games(self):
+            pass
+
+    plugin = PluginImpl(Platform.Generic, "0.1", None, None, None)
+    assert plugin.features == [Feature.ImportOwnedGames]
+
+def test_multiple_methods_feature_all():
+    class PluginImpl(Plugin): #pylint: disable=abstract-method
+        async def send_message(self, room_id, message):
+            pass
+        async def mark_as_read(self, room_id, last_message_id):
+            pass
+        async def get_rooms(self):
+            pass
+        async def get_room_history_from_message(self, room_id, message_id):
+            pass
+        async def get_room_history_from_timestamp(self, room_id, timestamp):
+            pass
+
+    plugin = PluginImpl(Platform.Generic, "0.1", None, None, None)
+    assert plugin.features == [Feature.Chat]
+
+def test_multiple_methods_feature_not_all():
+    class PluginImpl(Plugin): #pylint: disable=abstract-method
+        async def send_message(self, room_id, message):
+            pass
+
+    plugin = PluginImpl(Platform.Generic, "0.1", None, None, None)
+    assert plugin.features == []
diff --git a/tests/test_friends.py b/tests/test_friends.py
new file mode 100644
index 0000000..52cdd9b
--- /dev/null
+++ b/tests/test_friends.py
@@ -0,0 +1,90 @@
+import asyncio
+import json
+
+from galaxy.api.types import FriendInfo
+from galaxy.api.errors import UnknownError
+
+
+def test_get_friends_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_friends"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_friends.coro.return_value = [
+        FriendInfo("3", "Jan"),
+        FriendInfo("5", "Ola")
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_friends.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "friend_info_list": [
+                {"user_id": "3", "user_name": "Jan"},
+                {"user_id": "5", "user_name": "Ola"}
+            ]
+        }
+    }
+
+
+def test_get_friends_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_friends"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_friends.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_friends.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": 0,
+            "message": "Unknown error",
+        }
+    }
+
+
+def test_add_friend(plugin, write):
+    friend = FriendInfo("7", "Kuba")
+
+    async def couritine():
+        plugin.add_friend(friend)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "friend_added",
+        "params": {
+            "friend_info": {"user_id": "7", "user_name": "Kuba"}
+        }
+    }
+
+
+def test_remove_friend(plugin, write):
+    async def couritine():
+        plugin.remove_friend("5")
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "friend_removed",
+        "params": {
+            "user_id": "5"
+        }
+    }
diff --git a/tests/test_game_times.py b/tests/test_game_times.py
new file mode 100644
index 0000000..9ad7220
--- /dev/null
+++ b/tests/test_game_times.py
@@ -0,0 +1,175 @@
+import asyncio
+import json
+from unittest.mock import call
+
+import pytest
+from galaxy.api.types import GameTime
+from galaxy.api.errors import UnknownError, ImportInProgress, BackendError
+
+def test_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_game_times"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_game_times.coro.return_value = [
+        GameTime("3", 60, 1549550504),
+        GameTime("5", 10, 1549550502)
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_game_times.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "game_times": [
+                {
+                    "game_id": "3",
+                    "time_played": 60,
+                    "last_played_time": 1549550504
+                },
+                {
+                    "game_id": "5",
+                    "time_played": 10,
+                    "last_played_time": 1549550502
+                }
+            ]
+        }
+    }
+
+def test_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_game_times"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_game_times.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_game_times.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": 0,
+            "message": "Unknown error",
+        }
+    }
+
+def test_update_game(plugin, write):
+    game_time = GameTime("3", 60, 1549550504)
+
+    async def couritine():
+        plugin.update_game_time(game_time)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_time_updated",
+        "params": {
+            "game_time": {
+                "game_id": "3",
+                "time_played": 60,
+                "last_played_time": 1549550504
+            }
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_game_time_import_success(plugin, write):
+    plugin.game_time_import_success(GameTime("3", 60, 1549550504))
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_time_import_success",
+        "params": {
+            "game_time": {
+                "game_id": "3",
+                "time_played": 60,
+                "last_played_time": 1549550504
+            }
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_game_time_import_failure(plugin, write):
+    plugin.game_time_import_failure("134", ImportInProgress())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_time_import_failure",
+        "params": {
+            "game_id": "134",
+            "error": {
+                "code": 600,
+                "message": "Import already in progress"
+            }
+        }
+    }
+
+@pytest.mark.asyncio
+async def test_game_times_import_finished(plugin, write):
+    plugin.game_times_import_finished()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "game_times_import_finished",
+        "params": None
+    }
+
+@pytest.mark.asyncio
+async def test_start_game_times_import(plugin, write, mocker):
+    game_time_import_success = mocker.patch.object(plugin, "game_time_import_success")
+    game_time_import_failure = mocker.patch.object(plugin, "game_time_import_failure")
+    game_times_import_finished = mocker.patch.object(plugin, "game_times_import_finished")
+
+    game_ids = ["1", "5"]
+    game_time = GameTime("1", 10, 1549550502)
+    plugin.get_game_times.coro.return_value = [
+        game_time
+    ]
+    await plugin.start_game_times_import(game_ids)
+
+    with pytest.raises(ImportInProgress):
+        await plugin.start_game_times_import(["4", "8"])
+
+    # wait until all tasks are finished
+    for _ in range(4):
+        await asyncio.sleep(0)
+
+    plugin.get_game_times.coro.assert_called_once_with()
+    game_time_import_success.assert_called_once_with(game_time)
+    game_time_import_failure.assert_called_once_with("5", UnknownError())
+    game_times_import_finished.assert_called_once_with()
+
+@pytest.mark.asyncio
+async def test_start_game_times_import_failure(plugin, write, mocker):
+    game_time_import_failure = mocker.patch.object(plugin, "game_time_import_failure")
+    game_times_import_finished = mocker.patch.object(plugin, "game_times_import_finished")
+
+    game_ids = ["1", "5"]
+    error = BackendError()
+    plugin.get_game_times.coro.side_effect = error
+
+    await plugin.start_game_times_import(game_ids)
+
+    # wait until all tasks are finished
+    for _ in range(4):
+        await asyncio.sleep(0)
+
+    plugin.get_game_times.coro.assert_called_once_with()
+
+    assert game_time_import_failure.mock_calls == [call("1", error), call("5", error)]
+    game_times_import_finished.assert_called_once_with()
diff --git a/tests/test_install_game.py b/tests/test_install_game.py
new file mode 100644
index 0000000..ca9c4d0
--- /dev/null
+++ b/tests/test_install_game.py
@@ -0,0 +1,16 @@
+import asyncio
+import json
+
+def test_success(plugin, readline):
+    request = {
+        "jsonrpc": "2.0",
+        "method": "install_game",
+        "params": {
+            "game_id": "3"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_owned_games.return_value = None
+    asyncio.run(plugin.run())
+    plugin.install_game.assert_called_with(game_id="3")
diff --git a/tests/test_internal.py b/tests/test_internal.py
new file mode 100644
index 0000000..44f8ee7
--- /dev/null
+++ b/tests/test_internal.py
@@ -0,0 +1,68 @@
+import asyncio
+import json
+
+from galaxy.api.plugin import Plugin
+from galaxy.api.consts import Platform
+
+def test_get_capabilites(reader, writer, readline, write):
+    class PluginImpl(Plugin): #pylint: disable=abstract-method
+        async def get_owned_games(self):
+            pass
+
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "get_capabilities"
+    }
+    token = "token"
+    plugin = PluginImpl(Platform.Generic, "0.1", reader, writer, token)
+    readline.side_effect = [json.dumps(request), ""]
+    asyncio.run(plugin.run())
+    response = json.loads(write.call_args[0][0])
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "platform_name": "generic",
+            "features": [
+                "ImportOwnedGames"
+            ],
+            "token": token
+        }
+    }
+
+def test_shutdown(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "5",
+        "method": "shutdown"
+    }
+    readline.side_effect = [json.dumps(request)]
+    asyncio.run(plugin.run())
+    plugin.shutdown.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "5",
+        "result": None
+    }
+
+def test_ping(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "method": "ping"
+    }
+    readline.side_effect = [json.dumps(request), ""]
+    asyncio.run(plugin.run())
+    response = json.loads(write.call_args[0][0])
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "7",
+        "result": None
+    }
+
+def test_tick(plugin, readline):
+    readline.side_effect = [""]
+    asyncio.run(plugin.run())
+    plugin.tick.assert_called_with()
diff --git a/tests/test_launch_game.py b/tests/test_launch_game.py
new file mode 100644
index 0000000..fa654e9
--- /dev/null
+++ b/tests/test_launch_game.py
@@ -0,0 +1,16 @@
+import asyncio
+import json
+
+def test_success(plugin, readline):
+    request = {
+        "jsonrpc": "2.0",
+        "method": "launch_game",
+        "params": {
+            "game_id": "3"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_owned_games.return_value = None
+    asyncio.run(plugin.run())
+    plugin.launch_game.assert_called_with(game_id="3")
diff --git a/tests/test_local_games.py b/tests/test_local_games.py
new file mode 100644
index 0000000..445e699
--- /dev/null
+++ b/tests/test_local_games.py
@@ -0,0 +1,96 @@
+import asyncio
+import json
+
+import pytest
+
+from galaxy.api.types import LocalGame
+from galaxy.api.consts import LocalGameState
+from galaxy.api.errors import UnknownError, FailedParsingManifest
+
+def test_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_local_games"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+
+    plugin.get_local_games.coro.return_value = [
+        LocalGame("1", LocalGameState.Running),
+        LocalGame("2", LocalGameState.Installed),
+        LocalGame("3", LocalGameState.Installed | LocalGameState.Running)
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_local_games.assert_called_with()
+
+    response = json.loads(write.call_args[0][0])
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "local_games" : [
+                {
+                    "game_id": "1",
+                    "local_game_state": LocalGameState.Running.value
+                },
+                {
+                    "game_id": "2",
+                    "local_game_state": LocalGameState.Installed.value
+                },
+                {
+                    "game_id": "3",
+                    "local_game_state": (LocalGameState.Installed | LocalGameState.Running).value
+                }
+            ]
+        }
+    }
+
+@pytest.mark.parametrize(
+    "error,code,message",
+    [
+        pytest.param(UnknownError, 0, "Unknown error", id="unknown_error"),
+        pytest.param(FailedParsingManifest, 200, "Failed parsing manifest", id="failed_parsing")
+    ],
+)
+def test_failure(plugin, readline, write, error, code, message):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_local_games"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_local_games.coro.side_effect = error()
+    asyncio.run(plugin.run())
+    plugin.get_local_games.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": code,
+            "message": message
+        }
+    }
+
+def test_local_game_state_update(plugin, write):
+    game = LocalGame("1", LocalGameState.Running)
+
+    async def couritine():
+        plugin.update_local_game_status(game)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "local_game_status_changed",
+        "params": {
+            "local_game": {
+                "game_id": "1",
+                "local_game_state": LocalGameState.Running.value
+            }
+        }
+    }
diff --git a/tests/test_owned_games.py b/tests/test_owned_games.py
new file mode 100644
index 0000000..1202c9e
--- /dev/null
+++ b/tests/test_owned_games.py
@@ -0,0 +1,151 @@
+import asyncio
+import json
+
+from galaxy.api.types import Game, Dlc, LicenseInfo
+from galaxy.api.consts import LicenseType
+from galaxy.api.errors import UnknownError
+
+def test_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_owned_games"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_owned_games.coro.return_value = [
+        Game("3", "Doom", None, LicenseInfo(LicenseType.SinglePurchase, None)),
+        Game(
+            "5",
+            "Witcher 3",
+            [
+                Dlc("7", "Hearts of Stone", LicenseInfo(LicenseType.SinglePurchase, None)),
+                Dlc("8", "Temerian Armor Set", LicenseInfo(LicenseType.FreeToPlay, None)),
+            ],
+            LicenseInfo(LicenseType.SinglePurchase, None))
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_owned_games.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "result": {
+            "owned_games": [
+                {
+                    "game_id": "3",
+                    "game_title": "Doom",
+                    "license_info": {
+                        "license_type": "SinglePurchase"
+                    }
+                },
+                {
+                    "game_id": "5",
+                    "game_title": "Witcher 3",
+                    "dlcs": [
+                        {
+                            "dlc_id": "7",
+                            "dlc_title": "Hearts of Stone",
+                            "license_info": {
+                                "license_type": "SinglePurchase"
+                            }
+                        },
+                        {
+                            "dlc_id": "8",
+                            "dlc_title": "Temerian Armor Set",
+                            "license_info": {
+                                "license_type": "FreeToPlay"
+                            }
+                        }
+                    ],
+                    "license_info": {
+                        "license_type": "SinglePurchase"
+                    }
+                }
+            ]
+        }
+    }
+
+def test_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "method": "import_owned_games"
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_owned_games.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_owned_games.assert_called_with()
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "3",
+        "error": {
+            "code": 0,
+            "message": "Unknown error"
+        }
+    }
+
+def test_add_game(plugin, write):
+    game = Game("3", "Doom", None, LicenseInfo(LicenseType.SinglePurchase, None))
+
+    async def couritine():
+        plugin.add_game(game)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "owned_game_added",
+        "params": {
+            "owned_game": {
+                "game_id": "3",
+                "game_title": "Doom",
+                "license_info": {
+                    "license_type": "SinglePurchase"
+                }
+            }
+        }
+    }
+
+def test_remove_game(plugin, write):
+    async def couritine():
+        plugin.remove_game("5")
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "owned_game_removed",
+        "params": {
+            "game_id": "5"
+        }
+    }
+
+def test_update_game(plugin, write):
+    game = Game("3", "Doom", None, LicenseInfo(LicenseType.SinglePurchase, None))
+
+    async def couritine():
+        plugin.update_game(game)
+
+    asyncio.run(couritine())
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "method": "owned_game_updated",
+        "params": {
+            "owned_game": {
+                "game_id": "3",
+                "game_title": "Doom",
+                "license_info": {
+                    "license_type": "SinglePurchase"
+                }
+            }
+        }
+    }
diff --git a/tests/test_uninstall_game.py b/tests/test_uninstall_game.py
new file mode 100644
index 0000000..2e7c4ef
--- /dev/null
+++ b/tests/test_uninstall_game.py
@@ -0,0 +1,16 @@
+import asyncio
+import json
+
+def test_success(plugin, readline):
+    request = {
+        "jsonrpc": "2.0",
+        "method": "uninstall_game",
+        "params": {
+            "game_id": "3"
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_owned_games.return_value = None
+    asyncio.run(plugin.run())
+    plugin.uninstall_game.assert_called_with(game_id="3")
diff --git a/tests/test_users.py b/tests/test_users.py
new file mode 100644
index 0000000..24c9dbb
--- /dev/null
+++ b/tests/test_users.py
@@ -0,0 +1,69 @@
+import asyncio
+import json
+
+from galaxy.api.types import UserInfo, Presence
+from galaxy.api.errors import UnknownError
+from galaxy.api.consts import PresenceState
+
+
+def test_get_users_success(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "8",
+        "method": "import_user_infos",
+        "params": {
+            "user_id_list": ["13"]
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_users.coro.return_value = [
+        UserInfo("5", False, "Ula", "http://avatar.png", Presence(PresenceState.Offline))
+    ]
+    asyncio.run(plugin.run())
+    plugin.get_users.assert_called_with(user_id_list=["13"])
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "8",
+        "result": {
+            "user_info_list": [
+                {
+                    "user_id": "5",
+                    "is_friend": False,
+                    "user_name": "Ula",
+                    "avatar_url": "http://avatar.png",
+                    "presence": {
+                        "presence_state": "offline"
+                    }
+                }
+            ]
+        }
+    }
+
+
+def test_get_users_failure(plugin, readline, write):
+    request = {
+        "jsonrpc": "2.0",
+        "id": "12",
+        "method": "import_user_infos",
+        "params": {
+            "user_id_list": ["10", "11", "12"]
+        }
+    }
+
+    readline.side_effect = [json.dumps(request), ""]
+    plugin.get_users.coro.side_effect = UnknownError()
+    asyncio.run(plugin.run())
+    plugin.get_users.assert_called_with(user_id_list=["10", "11", "12"])
+    response = json.loads(write.call_args[0][0])
+
+    assert response == {
+        "jsonrpc": "2.0",
+        "id": "12",
+        "error": {
+            "code": 0,
+            "message": "Unknown error"
+        }
+    }