listers: Ensure run can be called without bounds arguments

Closes T2001

swh/lister/bitbucket/lister.py

@@ -5,7 +5,7 @@
 import logging
 import iso8601
 
-from datetime import datetime
+from datetime import datetime, timezone
 from urllib import parse
 
 from swh.lister.bitbucket.models import BitBucketModel
@@ -21,7 +21,7 @@ class BitBucketLister(IndexingHttpLister):
     LISTER_NAME = 'bitbucket'
     DEFAULT_URL = 'https://api.bitbucket.org/2.0'
     instance = 'bitbucket'
-    default_min_bound = datetime.utcfromtimestamp(0)
+    default_min_bound = datetime.fromtimestamp(0, timezone.utc)
 
     def __init__(self, url=None, override_config=None, per_page=100):
         super().__init__(url=url, override_config=override_config)

swh/lister/bitbucket/tests/test_bb_lister.py

@@ -35,6 +35,16 @@ class BitBucketListerTester(HttpListerTester, unittest.TestCase):
     entries_per_page = 10
     convert_type = staticmethod(convert_type)
 
+    def request_index(self, request):
+        """(Override) This is needed to emulate the listing bootstrap
+        when no min_bound is provided to run
+        """
+        m = self.test_re.search(request.path_url)
+        idx = convert_type(m.group(1))
+        if idx == self.Lister.default_min_bound:
+            idx = self.first_index
+        return idx
+
     @requests_mock.Mocker()
     def test_fetch_none_nodb(self, http_mocker):
         """Overridden because index is not an integer nor a string