add a cffi minimum test tox target and travis builder

This tests against macOS so we capture some commoncrypto branches
pyca · Nov 13, 2016 · dc19fe7 · dc19fe7
1 parent b2b2c53
commit dc19fe7
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diff --git a/.travis.yml b/.travis.yml
@@ -69,6 +69,10 @@ matrix:
           os: osx
           osx_image: xcode8
           env: TOXENV=py27 CRYPTOGRAPHY_OSX_NO_LINK_FLAGS=0
+        - language: generic
+          os: osx
+          osx_image: xcode8
+          env: TOXENV=py35-cffi-min CRYPTOGRAPHY_OSX_NO_LINK_FLAGS=1
         - language: generic
           os: osx
           # 7.3 is OS X 10.11.x

diff --git a/tox.ini b/tox.ini
@@ -44,6 +44,14 @@ commands =
     pip list
     py.test --capture=no --strict {posargs}
 
+# This target downgrades cffi to the minimum supported in setup.py
+[testenv:py35-cffi-min]
+deps =
+    coverage
+    ./vectors
+    cffi==1.4.1
+basepython = python3.5
+
 [testenv:pep8]
 extras =
     pep8test