test(testing.create_environ): Cover missed branches

This patch adds a couple tests to ensure that a couple code branches
in create_environ are exercised.

falcon/testing/helpers.py

@@ -84,7 +84,10 @@ def create_environ(path='/', query_string='', protocol='HTTP/1.1', port='80',
     body = io.BytesIO(body.encode('utf-8')
                       if isinstance(body, six.text_type) else body)
 
-    if six.PY2 and isinstance(path, unicode):
+    # NOTE(kgriffs): nocover since this branch will never be
+    # taken in Python3. However, the branch is tested under Py2,
+    # in test_utils.TestFalconTesting.test_unicode_path_in_create_environ
+    if six.PY2 and isinstance(path, unicode):  # pragma: nocover
         path = path.encode('utf-8')
 
     env = {

tests/test_utils.py

@@ -1,3 +1,5 @@
+# -*- coding: utf-8-*-
+
 from datetime import datetime
 import functools
 import random
@@ -6,6 +8,7 @@ import testtools
 import six
 
 import falcon
+import falcon.testing
 from falcon.util import uri
 
 
@@ -158,3 +161,21 @@ class TestFalconUtils(testtools.TestCase):
             expect = stdlib_unquote(case)
             actual = uri.decode(case)
             self.assertEqual(expect, actual)
+
+
+class TestFalconTesting(testtools.TestCase):
+    """Catch some uncommon branches not covered elsewhere."""
+
+    def test_unicode_path_in_create_environ(self):
+        if six.PY3:
+            self.skip('Test does not apply to Py3K')
+
+        env = falcon.testing.create_environ(u'/fancy/unícode')
+        self.assertEqual(env['PATH_INFO'], '/fancy/un\xc3\xadcode')
+
+        env = falcon.testing.create_environ(u'/simple')
+        self.assertEqual(env['PATH_INFO'], '/simple')
+
+    def test_none_header_value_in_create_environ(self):
+        env = falcon.testing.create_environ('/', headers={'X-Foo': None})
+        self.assertEqual(env['HTTP_X_FOO'], '')