Add debug testenv in tox

Once we add debug testenv, we can use "tox debug -- --debug"
to debug test cases when tox is running.

Change-Id: I8613c96bc1bd696ffa6a55e53441e9dda3e25711

1 files changed, 3 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 753af52a..b79cbb5c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,6 +27,9 @@ commands =
     bash -c "find trove -type f -regex '.*\.pot?' -print0 | \
              xargs -0 -n 1 msgfmt --check-format -o /dev/null"
 
+[testenv:debug]
+commands = oslo_debug_helper {posargs}
+
 [testenv:cover]
 basepython = python2.7
 commands =