minor style and text fixesdevelop

1 files changed, 8 insertions, 2 deletions

diff --git a/test/extractor/text/test_summary.py b/test/extractor/text/test_summary.py
index 78d3002..aee1ee2 100644
--- a/test/extractor/text/test_summary.py
+++ b/test/extractor/text/test_summary.py
@@ -36,14 +36,20 @@ class TestTextMetrics(unittest.TestCase):
         path = os.path.join(os.path.dirname(__file__), 'example-en.txt')
         # fetch document
         text = rdr(path)
-
+        # empty input yields no triples
+        self.assertEqual(list(ext.extract(subject, [], principals)), [])
+        self.assertEqual(list(ext.extract(subject, [' '], principals)), [])
+        self.assertEqual(list(ext.extract(subject, [' ', ' ', ' '], principals)), [])
+        # creates a summary
         with warnings.catch_warnings():
             warnings.simplefilter('ignore', category=FutureWarning)
             triples = list(ext.extract(subject, text, principals))
-
         self.assertEqual(triples, [
             (subject, ext.schema.predicate(ns.bse.summary),
                 'Alice is tired of sitting by her sister on the bank')])
+        # skip unknown predicates
+        self.assertSetEqual(set(), set(ext.extract(subject, text,
+            {ext.schema.predicate(ns.bsfs.Predicate).child(ns.bse.unknown)})))
 
 ## main ##