# HG changeset patch
# User Georges Racinet <georges.racinet@octobus.net>
# Date 2019-12-20 16:19:25
# Node ID ac627ed8a911573175f0fc2437559d46525e321e
# Parent  f98f0e3ddaa180b141d55112cbedf4c3189fbefd

tests-pure: fixing test-parseindex2

This is a followup to D7603 (49fa0b31ee1d) which broke
the tests for pure Python implementation. There are two
divergences between pure and C implementations:

- the pure implementation would accept only -1 as slice end,
  whereas C accepts both -1 and len(index)
- in pure Python, `headrevs` is provided by revlog.py, not
  by the index.

Differential Revision: https://phab.mercurial-scm.org/D7707

diff --git a/tests/test-parseindex2.py b/tests/test-parseindex2.py
--- a/tests/test-parseindex2.py
+++ b/tests/test-parseindex2.py
@@ -267,11 +267,13 @@ class parseindex2tests(unittest.TestCase
         appendrev(6)
         self.assertEqual(len(index), 7)
 
-        del index[1:7]
+        del index[1:-1]
 
         # assertions that failed before correction
         self.assertEqual(len(index), 1)  # was 4
-        self.assertEqual(index.headrevs(), [0])  # gave ValueError
+        headrevs = getattr(index, 'headrevs', None)
+        if headrevs is not None:  # not implemented in pure
+            self.assertEqual(index.headrevs(), [0])  # gave ValueError
 
 
 if __name__ == '__main__':