* make test assertion more explicit

* cleanup

rest_framework/tests/fields.py

@@ -846,7 +846,7 @@ class HumanizedFieldType(TestCase):
 
         """
         self.assertIsInstance(humanized, unicode)
-        self.assertTrue(humanized)
+        self.assertNotEqual(humanized, '')
 
 
 class HumanizedField(TestCase):

rest_framework/tests/views.py

@@ -6,8 +6,6 @@ from rest_framework.decorators import api_view
 from rest_framework.response import Response
 from rest_framework.settings import api_settings
 from rest_framework.views import APIView
-from rest_framework import exceptions
-from rest_framework import serializers
 import copy
 
 factory = RequestFactory()
@@ -100,4 +98,3 @@ class FunctionBasedViewIntegrationTests(TestCase):
         }
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
         self.assertEqual(sanitise_json_error(response.data), expected)
-