zulip-bot-server: Add test suite for zulip bot server.

Fixes: #5358.

api/setup.py

@@ -62,6 +62,7 @@ package_info = dict(
             'zulip-bot-server=zulip.bot_server:main',
         ],
     },
+    test_suite='tests',
 )  # type: Dict[str, Any]
 
 setuptools_info = dict(
@@ -69,14 +70,15 @@ setuptools_info = dict(
                       'simplejson',
                       'six',
                       'typing>=3.5.2.2',
-                      'flask>=0.12.2'
+                      'flask>=0.12.2',
+                      'mock>=2.0.0',
                       ],
 )
 
 try:
     from setuptools import setup, find_packages
     package_info.update(setuptools_info)
-    package_info['packages'] = find_packages()
+    package_info['packages'] = find_packages(exclude=["tests"])
 
 except ImportError:
     from distutils.core import setup

api/tests/bot_server_test_lib.py

@@ -0,0 +1,37 @@
+from unittest import TestCase
+import zulip.bot_server
+import json
+from typing import Any, List, Dict, Mapping
+
+class BotServerTestCase(TestCase):
+
+    def setUp(self):
+        # type: () -> None
+        zulip.bot_server.app.testing = True
+        self.app = zulip.bot_server.app.test_client()
+
+    def assert_bot_server_response(self,
+                                   available_bots=None,
+                                   bots_config=None,
+                                   bots_lib_module=None,
+                                   payload_url="/bots/testbot",
+                                   message=dict(message={'key': "test message"}),
+                                   check_success=False,
+                                   ):
+        # type: (List[str], Dict[str, Any], Dict[str, Any], str, Dict[str, Dict[str, Any]], bool) -> None
+
+        if available_bots is not None:
+            zulip.bot_server.available_bots = available_bots
+
+        if bots_config is not None:
+            zulip.bot_server.bots_config = bots_config
+
+        if bots_lib_module is not None:
+            zulip.bot_server.bots_lib_module = bots_lib_module
+
+        response = self.app.post(payload_url, data=json.dumps(message))
+
+        if check_success:
+            assert response.status_code >= 200 and response.status_code < 300
+        else:
+            assert response.status_code >= 400 and response.status_code < 500

api/tests/test_bot_server.py

@@ -0,0 +1,60 @@
+from __future__ import absolute_import
+import mock
+import unittest
+from typing import Any
+from .bot_server_test_lib import BotServerTestCase
+
+class BotServerTests(BotServerTestCase):
+    class MockMessageHandler(object):
+        def handle_message(self, message, bot_handler, state_handler):
+            # type: (Any, Any, Any) -> None
+            assert message == {'key': "test message"}
+
+    class MockLibModule(object):
+        def handler_class(self):
+            # type: () -> Any
+            return BotServerTests.MockMessageHandler()
+
+    @mock.patch('zulip.bot_server.ExternalBotHandler')
+    def test_successful_request(self, mock_ExternalBotHandler):
+        # type: (mock.Mock) -> None
+        available_bots = ['testbot']
+        bots_config = {
+            'testbot': {
+                'email': 'testbot-bot@zulip.com',
+                'key': '123456789qwertyuiop',
+                'site': 'http://localhost',
+            }
+        }
+        bots_lib_module = {
+            'testbot': BotServerTests.MockLibModule()
+        }
+        self.assert_bot_server_response(available_bots=available_bots,
+                                        bots_config=bots_config,
+                                        bots_lib_module=bots_lib_module,
+                                        check_success=True)
+        assert mock_ExternalBotHandler.called
+
+    def test_bot_not_supported(self):
+        # type: () -> None
+        available_bots = ['testbot']
+        self.assert_bot_server_response(available_bots=available_bots,
+                                        payload_url="/bots/not_supported_bot",
+                                        check_success=False)
+
+    def test_wrong_bot_credentials(self):
+        # type: () -> None
+        available_bots = ['testbot']
+        bots_config = {
+            'testbot': {
+                'email': 'testbot-bot@zulip.com',
+                'key': '123456789qwertyuiop',
+                'site': 'http://localhost',
+            }
+        }
+        self.assert_bot_server_response(available_bots=available_bots,
+                                        bots_config=bots_config,
+                                        check_success=False)
+
+if __name__ == '__main__':
+    unittest.main()