Avoid . on the end of files, but still test axfr default

tests/test_octodns_source_axfr.py

@@ -9,6 +9,7 @@ import dns.zone
 from dns.exception import DNSException
 
 from mock import patch
+from shutil import copyfile
 from six import text_type
 from unittest import TestCase
 
@@ -21,7 +22,7 @@ from octodns.record import ValidationError
 class TestAxfrSource(TestCase):
     source = AxfrSource('test', 'localhost')
 
-    forward_zonefile = dns.zone.from_file('./tests/zones/unit.tests.',
+    forward_zonefile = dns.zone.from_file('./tests/zones/unit.tests.tst',
                                           'unit.tests', relativize=False)
 
     @patch('dns.zone.from_xfr')
@@ -44,7 +45,7 @@ class TestAxfrSource(TestCase):
 
 
 class TestZoneFileSource(TestCase):
-    source = ZoneFileSource('test', './tests/zones')
+    source = ZoneFileSource('test', './tests/zones', file_extension='tst')
 
     def test_zonefiles_with_extension(self):
         source = ZoneFileSource('test', './tests/zones', 'extension')
@@ -53,6 +54,14 @@ class TestZoneFileSource(TestCase):
         source.populate(valid)
         self.assertEquals(1, len(valid.records))
 
+    def test_zonefiles_without_extension(self):
+        copyfile('./tests/zones/unit.tests.tst', './tests/zones/unit.tests.')
+        source = ZoneFileSource('test', './tests/zones')
+        # Load zonefiles without a specified file extension
+        valid = Zone('unit.tests.', [])
+        source.populate(valid)
+        self.assertEquals(12, len(valid.records))
+
     def test_populate(self):
         # Valid zone file in directory
         valid = Zone('unit.tests.', [])