Adjust UploadIO spec

Author: Laurynas Butkus

convertapi/format_detector.py

@@ -10,4 +10,4 @@ def detect(resource):
     else:
         path = utils.urlparse(resource).path
 
-    return splitext(path)[1][1:].lower()
+    return splitext(path)[1][1:].lower()

tests/test_convertapi.py

@@ -27,7 +27,7 @@ def test_convert_url(self):
 		assert result.conversion_cost > 0
 
 	def test_upload_io(self):
-		string_io = io.StringIO(u'test')
-		upload_io = convertapi.UploadIO(string_io, 'test.txt')
+		bytes_io = io.BytesIO(b'test')
+		upload_io = convertapi.UploadIO(bytes_io, 'test.txt')
 		result = convertapi.convert('pdf', { 'File': upload_io })
-		assert result.conversion_cost > 0
+		assert result.conversion_cost > 0