Fix for format flags not working on single endpoints

tests/conftest.py

@@ -45,7 +45,7 @@ def fixed_url_fix(s, charset='utf-8'):
 @pytest.fixture(scope='session')
 def endpoints():
     httpretty.enable()
-    with open(os.path.join(TESTS_DIR, 'endpoints.json')) as resource:
+    with open(os.path.join(TESTS_DIR, 'endpoints.json'), encoding="utf-8") as resource:
         test_data = json.load(resource)
 
     endpoints = test_data['endpoints']

tests/test_wrappers.py

@@ -8,6 +8,7 @@
 from requests.exceptions import HTTPError
 
 from tortilla.utils import Bunch, bunchify, run_from_ipython
+from tortilla.formatters import hyphenate
 
 
 def time_function(fn, *args, **kwargs):
@@ -17,6 +18,17 @@ def time_function(fn, *args, **kwargs):
     return t2 - t1
 
 
+def test_call_formatter(api):
+    endpoint = 'hyphenated_endpoint'
+    r = api(endpoint, hyphenate=True)
+    assert r._parent.config.formatter == hyphenate
+    assert r._part == hyphenate(endpoint)
+
+    r = api.hyphenated_endpoint(hyphenate=True)
+    assert r._parent.config.formatter == hyphenate
+    assert r._part == hyphenate(endpoint)
+
+
 def test_json_response(api, endpoints):
     assert api.user.get('jimmy') == endpoints['/user/jimmy']['body']
     assert api.user.get('имя') == endpoints['/user/имя']['body']

tortilla/wrappers.py

@@ -336,6 +336,16 @@ def __call__(self, *parts, **options):
         :param options: (optional) Arguments accepted by the
             :class:`Wrap` initializer
         """
+
+        # check if a formatter is given for the url endpoint
+        if options.get('formatter') is None:
+            if options.get('hyphenate'):
+                options['formatter'] = formatters.hyphenate
+            elif options.get('mixedcase'):
+                options['formatter'] = formatters.mixedcase
+            elif options.get('camelcase'):
+                options['formatter'] = formatters.camelcase
+
         self.config.update(**options)
 
         if len(parts) == 0:
@@ -351,12 +361,12 @@ def __getattr__(self, part):
         if part in self.__dict__:
             return self.__dict__[part]
 
-        if self.config.formatter:
-            part = self.config.formatter(part)
-
         return self._get_or_create_child_wrap(part)
 
     def _get_or_create_child_wrap(self, name):
+        if self.config.formatter:
+            name = self.config.formatter(name)
+
         if name not in self._children:
             self._children[name] = self.__class__(
                 part=name,