len_slice: Test more unknown length cases

Add some more tests to make sure a better variety of cases are verified to raise an unknown length error.
jakirkham · Jan 17, 2017 · 8ff9945 · 8ff9945
1 parent 6497c23
commit 8ff9945
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/tests/test_measure.py b/tests/test_measure.py
@@ -36,9 +36,15 @@ def test_len_slice(self):
         with self.assertRaises(measure.UnknownSliceLengthException):
             measure.len_slice(slice(None))
 
+        with self.assertRaises(measure.UnknownSliceLengthException):
+            measure.len_slice(slice(0, -1, 1))
+
         with self.assertRaises(measure.UnknownSliceLengthException):
             measure.len_slice(slice(None, None, -1))
 
+        with self.assertRaises(measure.UnknownSliceLengthException):
+            measure.len_slice(slice(-1, 1, -1))
+
         for size in [10, 11, 12]:
             excess = size + 3
             each_range = range(size)