diff --git a/scrapy/trunk/scrapy/tests/test_utils_response.py b/scrapy/trunk/scrapy/tests/test_utils_response.py
new file mode 100644
index 000000000..feec740ad
--- /dev/null
+++ b/scrapy/trunk/scrapy/tests/test_utils_response.py
@@ -0,0 +1,28 @@
+import unittest
+from scrapy.http.response import Response
+from scrapy.utils.response import body_or_str
+
+class ResponseUtilsTest(unittest.TestCase):
+    dummy_response = Response(domain='example.org', url='http://example.org/', body='dummy_response')
+
+    def test_input(self):
+        self.assertTrue(isinstance(body_or_str(self.dummy_response), basestring))
+        self.assertTrue(isinstance(body_or_str('text'), basestring))
+        self.assertRaises(Exception, body_or_str, 2)
+
+    def test_extraction(self):
+        self.assertEqual(body_or_str(self.dummy_response), 'dummy_response')
+        self.assertEqual(body_or_str('text'), 'text')
+
+    def test_encoding(self):
+        self.assertTrue(isinstance(body_or_str(self.dummy_response, unicode=False), str))
+        self.assertTrue(isinstance(body_or_str(self.dummy_response, unicode=True), unicode))
+
+        self.assertTrue(isinstance(body_or_str('text', unicode=False), str))
+        self.assertTrue(isinstance(body_or_str('text', unicode=True), unicode))
+
+        self.assertTrue(isinstance(body_or_str(u'text', unicode=False), str))
+        self.assertTrue(isinstance(body_or_str(u'text', unicode=True), unicode))
+
+if __name__ == "__main__":
+    unittest.main()