Raise Exception if there's no bot instance in context

tests/__init__.py

@@ -0,0 +1,39 @@
+import aresponses
+from aiogram import Bot
+
+TOKEN = '123456789:AABBCCDDEEFFaabbccddeeff-1234567890'
+
+
+class FakeTelegram(aresponses.ResponsesMockServer):
+    def __init__(self, message_dict, bot=None, **kwargs):
+        super().__init__(**kwargs)
+        self._body, self._headers = self.parse_data(message_dict)
+
+        if isinstance(bot, Bot):
+            Bot.set_current(bot)
+
+    async def __aenter__(self):
+        await super().__aenter__()
+        _response = self.Response(text=self._body, headers=self._headers, status=200, reason='OK')
+        self.add(self.ANY, response=_response)
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb):
+        if hasattr(self, 'monkeypatch'):
+            self.monkeypatch.undo()
+        await super().__aexit__(exc_type, exc_val, exc_tb)
+
+    @staticmethod
+    def parse_data(message_dict):
+        import json
+
+        _body = '{"ok":true,"result":' + json.dumps(message_dict) + '}'
+        _headers = {'Server': 'nginx/1.12.2',
+                    'Date': 'Tue, 03 Apr 2018 16:59:54 GMT',
+                    'Content-Type': 'application/json',
+                    'Content-Length': str(len(_body)),
+                    'Connection': 'keep-alive',
+                    'Access-Control-Allow-Origin': '*',
+                    'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
+                    'Access-Control-Expose-Headers': 'Content-Length,Content-Type,Date,Server,Connection',
+                    'Strict-Transport-Security': 'max-age=31536000; includeSubdomains'}
+        return _body, _headers