Fix optional args in account_update_credentials

avatar and header are now correctly ignored if not specified.

mastodon/Mastodon.py

@@ -1226,19 +1226,21 @@ class Mastodon:
         params_initial = locals()
         
         # Load avatar, if specified
+        if not avatar is None:
             if avatar_mime_type is None and os.path.isfile(avatar):
                 avatar_mime_type = mimetypes.guess_type(avatar)[0]
                 avatar = open(avatar, 'rb')
 
-        if (not avatar is None and avatar_mime_type is None):
+            if avatar_mime_type is None:
                 raise MastodonIllegalArgumentError('Could not determine mime type or data passed directly without mime type.')
         
         # Load header, if specified
+        if not header is None:
             if header_mime_type is None and os.path.isfile(header):
                 header_mime_type = mimetypes.guess_type(header)[0]
                 header = open(header, 'rb')
 
-        if (not header is None and header_mime_type is None):
+            if header_mime_type is None:
                 raise MastodonIllegalArgumentError('Could not determine mime type or data passed directly without mime type.')
         
         # Clean up params

tests/test_account.py

@@ -92,3 +92,23 @@ def test_account_update_credentials(api):
             header = image,
             header_mime_type = "image/jpeg")
     assert account
+
+@pytest.mark.vcr(match_on=['path'])
+def test_account_update_credentials_no_header(api):
+    account = api.account_update_credentials(
+            display_name='John Lennon',
+            note='I walk funny',
+            avatar = "tests/image.jpg")
+    assert account
+
+@pytest.mark.vcr(match_on=['path'])
+def test_account_update_credentials_no_avatar(api):
+    with open('tests/image.jpg', 'rb') as f:
+        image = f.read()
+
+    account = api.account_update_credentials(
+            display_name='John Lennon',
+            note='I walk funny',
+            header = image,
+            header_mime_type = "image/jpeg")
+    assert account