Check that return statements are of the expected type

daemon_get_images.py

@@ -507,7 +507,7 @@ def show_qrcode(self, calling_domain: str, path: str,
         if etag_exists(self, qr_filename):
             # The file has not changed
             http_304(self)
-            return
+            return True
 
         tries = 0
         media_binary = None

desktop_client.py

@@ -700,9 +700,9 @@ def _get_first_item_id(box_json: {}) -> str:
     """Returns the id of the first item in the timeline
     """
     if _timeline_is_empty(box_json):
-        return
+        return ''
     if len(box_json['orderedItems']) == 0:
-        return
+        return ''
     return box_json['orderedItems'][0]['id']
 
 

follow.py

@@ -338,7 +338,7 @@ def unfollow_account(base_dir: str, nickname: str, domain: str,
         if debug:
             print('DEBUG: handle to unfollow ' + handle_to_unfollow +
                   ' is not in ' + filename)
-        return
+        return False
     lines = []
     try:
         with open(filename, 'r', encoding='utf-8') as fp_unfoll:

reaction.py

@@ -87,7 +87,7 @@ def _reactionpost(recent_posts_cache: {},
         return None
     if not valid_emoji_content(emoji_content):
         print('_reaction: Invalid emoji reaction: "' + emoji_content + '"')
-        return
+        return None
 
     full_domain = get_full_domain(domain, port)
 

speaker.py

@@ -437,11 +437,11 @@ def _post_to_speaker_json(base_dir: str, http_prefix: str,
     format for speech synthesis
     """
     if not has_object_dict(post_json_object):
-        return
+        return {}
     if not post_json_object['object'].get('content'):
-        return
+        return {}
     if not isinstance(post_json_object['object']['content'], str):
-        return
+        return {}
     detected_links = []
     content = urllib.parse.unquote_plus(post_json_object['object']['content'])
     content = html.unescape(content)
@@ -499,7 +499,7 @@ def _post_to_speaker_json(base_dir: str, http_prefix: str,
     speaker_name = \
         get_display_name(base_dir, actor_url, person_cache)
     if not speaker_name:
-        return
+        return {}
     speaker_name = _remove_emoji_from_text(speaker_name)
     speaker_name = speaker_name.replace('_', ' ')
     speaker_name = camel_case_split(speaker_name)

tests.py

@@ -5546,6 +5546,7 @@ def _test_functions():
                 method_name = ''
                 method_args = []
                 module_line = 0
+                curr_return_types = ''
                 for line in lines:
                     module_line += 1
                     # what group is this module in?
@@ -5585,6 +5586,17 @@ def _test_functions():
                                 if loc_str not in method_loc:
                                     method_loc.append(loc_str)
                                     line_count = 0
+
+                        # check return statements are of the expected type
+                        if curr_return_types and \
+                           '"""' not in line and \
+                           line.endswith(' return\n'):
+                            if curr_return_types != 'None':
+                                print(method_name + ' in module ' +
+                                      mod_name + ' has unexpected return')
+                                print('Expected: return ' + curr_return_types)
+                                print('Actual:   ' + line.strip())
+                                assert False
                         prev_line = line
                         continue
                     # reading function def
@@ -5594,6 +5606,14 @@ def _test_functions():
                     # get list of arguments with spaces removed
                     method_args = \
                         source_str.split('def ' + method_name + '(')[1]
+                    return_types = method_args.split(')')[1]
+                    if ':' in return_types:
+                        return_types = return_types.split(':')[0]
+                    if '->' in return_types:
+                        return_types = return_types.split('->')[1].strip()
+                    else:
+                        return_types = ''
+                    curr_return_types = return_types
                     method_args = method_args.split(')')[0]
                     method_args = method_args.replace(' ', '').split(',')
                     if function.get(mod_name):
@@ -5606,7 +5626,8 @@ def _test_functions():
                     function_properties[method_name] = {
                         "args": method_args,
                         "module": mod_name,
-                        "calledInModule": []
+                        "calledInModule": [],
+                        "returns": return_types
                     }
                 # LOC count for the last function
                 if line_count > 2:
@@ -5684,8 +5705,7 @@ def _test_functions():
                     continue
                 # detect a call to this function
                 if name + '(' in line:
-                    mod_list = \
-                        properties['calledInModule']
+                    mod_list = properties['calledInModule']
                     if mod_name not in mod_list:
                         mod_list.append(mod_name)
                     if mod_name in exclude_func_args:

webapp_welcome.py

@@ -24,7 +24,7 @@ def is_welcome_screen_complete(base_dir: str,
     """
     account_path = acct_dir(base_dir, nickname, domain)
     if not os.path.isdir(account_path):
-        return
+        return False
     complete_filename = account_path + '/.welcome_complete'
     return os.path.isfile(complete_filename)