Fix test to check that output file does not exist

invisible_cities/cities/buffy_test.py

@@ -86,13 +86,10 @@ def test_buffy_no_file_without_sns_response(config_tmpdir, ICDATADIR):
     conf = configure('buffy invisible_cities/config/buffy.conf'.split())
     conf.update(dict(files_in=file_in, file_out=file_out, event_range=nevt))
 
-    try:
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", category=UserWarning)
         buffy(**conf)
-    except:
-        if not os.path.exists(file_out):
-            assert True
-        else:
-            assert False
+    assert not os.path.exists(file_out)
 
 
 def test_buffy_filters_empty(config_tmpdir, ICDATADIR):

invisible_cities/cities/components.py

@@ -179,6 +179,8 @@ def index_tables(file_out):
     -checks if any columns in the tables have been marked to be indexed by writers
     -indexes those columns
     """
+    if not os.path.exists(file_out):
+        return
     with tb.open_file(file_out, 'r+') as h5out:
         for table in h5out.walk_nodes(classname='Table'):        # Walk over all tables in h5out
             if 'columns_to_index' not in table.attrs:  continue  # Check for columns to index