six: expect specific version

since we use features introduced in 1.9.0, we require it for
installation/use

also add test coverage to ensure we update that version when we need
something newer

1 files changed, 7 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index fbaf823..0b3bcda 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,12 +12,19 @@ deps =
      py{26}: hypothesis<3
      py{26,27,34,35,36,37,38,py,py3}: pytest
      py{27,34,35,36,37,38,py,py3}: hypothesis
+# six==1.9.0 comes from setup.py install_requires
+     py27_old_six: six==1.9.0
+     py27_old_six: pytest
+     py27_old_six: hypothesis
      py: pytest
      py: hypothesis
      py{33}: wheel<0.30
      coverage
 commands = coverage run --branch -m pytest {posargs:src/ecdsa}
 
+[testenv:py27_old_six]
+basepython = python2.7
+
 [testenv:coverage]
 sitepackages=True
 commands = coverage run --branch -m pytest --hypothesis-show-statistics {posargs:src/ecdsa}