fix freeze/thaw, add test case

1 files changed, 5 insertions, 0 deletions

diff --git a/src/carquinyol/optimizer.py b/src/carquinyol/optimizer.py
index 2b6ce29..0be0a99 100644
--- a/src/carquinyol/optimizer.py
+++ b/src/carquinyol/optimizer.py
@@ -73,6 +73,11 @@ class Optimizer(object):
                 if e.errno != errno.ENOTEMPTY:
                     raise
 
+    def async_running(self):
+        """Check whether there are any asynchronous operations in progress.
+        """
+        return self._enqueue_checksum_id is not None
+
     def _identical_file_already_exists(self, checksum):
         """Check if we already have files with this checksum.