hotfix for #164

pubs/commands/statistics_cmd.py

@@ -16,6 +16,10 @@ def command(conf, args):
     papers = list(rp.all_papers())
 
     paper_count = len(papers)
+    if paper_count == 0:
+        ui.message('Your pubs repository is empty.')
+
+    else:
         doc_count = sum([0 if p.docpath is None else 1 for p in papers])
         tag_count = len(list(rp.get_tags()))
         papers_with_tags = sum([0 if p.tags else 1 for p in papers])

tests/test_usecase.py

@@ -984,6 +984,7 @@ class TestUsecase(DataCommandTestCase):
 
     def test_statistics(self):
         cmds = ['pubs init',
+                'pubs statistics',
                 'pubs add data/pagerank.bib',
                 'pubs add -d data/turing-mind-1950.pdf data/turing1950.bib',
                 'pubs add data/martius.bib',
@@ -993,6 +994,8 @@ class TestUsecase(DataCommandTestCase):
                 'pubs statistics',
                 ]
         out = self.execute_cmds(cmds)
+        lines = out[1].splitlines()
+        self.assertEqual(lines[0], 'Your pubs repository is empty.')
         lines = out[-1].splitlines()
         self.assertEqual(lines[0], 'Repository statistics:')
         self.assertEqual(lines[1], 'Total papers: 4, 1 (25%) have a document attached')