stay compatible during testing

diff --git a/deltatar/deltatar.py b/deltatar/deltatar.py
index 7fdf5c6..9bf1ef3 100644 (file)
--- a/deltatar/deltatar.py
+++ b/deltatar/deltatar.py
@@ -197,7 +197,13 @@ class DeltaTar(object):
         self.included_files = included_files
         self.filter_func = filter_func
         if logger:
-            self.logger = logger
+            if isinstance(logger, logging.Logger):
+                self.logger = logger
+            else:
+                self.logger = logging.getLogger('deltatar.DeltaTar')
+                self.logger.addHandler(logger)
+        else:
+            self.logger = logging.getLogger('deltatar.DeltaTar')
         self.mode = mode
         self.password = password