Pass correct parse_mode to InlineResults if bot.defaults is None (#1763)

* Pass correct parse_mode to InlineResults if bot.defaults is None

* Add tests for inlinequeryresults with (default)parse_mode

* enhance tests

telegram/bot.py

@@ -1512,7 +1512,10 @@ class Bot(TelegramObject):
 
         for res in results:
             if res._has_parse_mode and res.parse_mode == DEFAULT_NONE:
+                if self.defaults:
                     res.parse_mode = self.defaults.parse_mode
+                else:
+                    res.parse_mode = None
             if res._has_input_message_content and res.input_message_content:
                 if (res.input_message_content._has_parse_mode
                         and res.input_message_content.parse_mode == DEFAULT_NONE):

tests/test_bot.py

@@ -28,7 +28,8 @@ from future.utils import string_types
 
 from telegram import (Bot, Update, ChatAction, TelegramError, User, InlineKeyboardMarkup,
                       InlineKeyboardButton, InlineQueryResultArticle, InputTextMessageContent,
-                      ShippingOption, LabeledPrice, ChatPermissions, Poll)
+                      ShippingOption, LabeledPrice, ChatPermissions, Poll,
+                      InlineQueryResultDocument)
 from telegram.error import BadRequest, InvalidToken, NetworkError, RetryAfter
 from telegram.utils.helpers import from_timestamp, escape_markdown
 
@@ -237,6 +238,67 @@ class TestBot(object):
                                        switch_pm_text='switch pm',
                                        switch_pm_parameter='start_pm')
 
+    def test_answer_inline_query_no_default_parse_mode(self, monkeypatch, bot):
+        def test(_, url, data, *args, **kwargs):
+            return data == {'cache_time': 300,
+                            'results': [{'title': 'test_result', 'id': '123', 'type': 'document',
+                                         'document_url': 'https://raw.githubusercontent.com/'
+                                         'python-telegram-bot/logos/master/logo/png/'
+                                         'ptb-logo_240.png', 'mime_type': 'image/png',
+                                         'caption': 'ptb_logo'}],
+                            'next_offset': '42', 'switch_pm_parameter': 'start_pm',
+                            'inline_query_id': 1234, 'is_personal': True,
+                            'switch_pm_text': 'switch pm'}
+
+        monkeypatch.setattr('telegram.utils.request.Request.post', test)
+        results = [InlineQueryResultDocument(
+            id='123',
+            document_url='https://raw.githubusercontent.com/python-telegram-bot/logos/master/'
+                         'logo/png/ptb-logo_240.png',
+            title='test_result',
+            mime_type='image/png',
+            caption='ptb_logo',
+        )]
+
+        assert bot.answer_inline_query(1234,
+                                       results=results,
+                                       cache_time=300,
+                                       is_personal=True,
+                                       next_offset='42',
+                                       switch_pm_text='switch pm',
+                                       switch_pm_parameter='start_pm')
+
+    @pytest.mark.parametrize('default_bot', [{'parse_mode': 'Markdown'}], indirect=True)
+    def test_answer_inline_query_default_parse_mode(self, monkeypatch, default_bot):
+        def test(_, url, data, *args, **kwargs):
+            return data == {'cache_time': 300,
+                            'results': [{'title': 'test_result', 'id': '123', 'type': 'document',
+                                         'document_url': 'https://raw.githubusercontent.com/'
+                                         'python-telegram-bot/logos/master/logo/png/'
+                                         'ptb-logo_240.png', 'mime_type': 'image/png',
+                                         'caption': 'ptb_logo', 'parse_mode': 'Markdown'}],
+                            'next_offset': '42', 'switch_pm_parameter': 'start_pm',
+                            'inline_query_id': 1234, 'is_personal': True,
+                            'switch_pm_text': 'switch pm'}
+
+        monkeypatch.setattr('telegram.utils.request.Request.post', test)
+        results = [InlineQueryResultDocument(
+            id='123',
+            document_url='https://raw.githubusercontent.com/python-telegram-bot/logos/master/'
+                         'logo/png/ptb-logo_240.png',
+            title='test_result',
+            mime_type='image/png',
+            caption='ptb_logo',
+        )]
+
+        assert default_bot.answer_inline_query(1234,
+                                               results=results,
+                                               cache_time=300,
+                                               is_personal=True,
+                                               next_offset='42',
+                                               switch_pm_text='switch pm',
+                                               switch_pm_parameter='start_pm')
+
     @flaky(3, 1)
     @pytest.mark.timeout(10)
     def test_get_user_profile_photos(self, bot, chat_id):