Merge pull request #1572 from pganssle/import_futures_test_reqs

Add futures and backport to Python 2.7 test requirements

changelog.d/1572.misc.rst

+Added the ``concurrent.futures`` backport ``futures`` to the Python 2.7 test suite requirements.

setuptools/tests/test_build_meta.py

@@ -13,8 +13,9 @@ from . import py2_only
 
 __metaclass__ = type
 
-futures = pytest.importorskip('concurrent.futures')
-importlib = pytest.importorskip('importlib')
+# Backports on Python 2.7
+import importlib
+from concurrent import futures
 
 
 class BuildBackendBase:

tests/requirements.txt

@@ -8,3 +8,4 @@ wheel
 coverage>=4.5.1
 pytest-cov>=2.5.1
 paver; python_version>="3.6"
+futures; python_version=="2.7"