TEST: PYTHONHASHSEED=0, to stabilize test order

Dictionaries in Python < 3.6 are not ordered by insertion

Author: effigies

nipype/info.py

@@ -153,7 +153,7 @@ def get_nipype_gitversion():
 if sys.version_info <= (3, 4):
     REQUIRES.append('configparser')
 
-TESTS_REQUIRES = ['pytest-cov', 'codecov', 'pytest-xdist']
+TESTS_REQUIRES = ['pytest-cov', 'codecov', 'pytest-xdist', 'pytest-env']
 
 EXTRA_REQUIRES = {
     'doc': ['Sphinx>=1.4', 'numpydoc', 'matplotlib', 'pydotplus', 'pydot>=1.2.3'],

nipype/pytest.ini

@@ -2,3 +2,5 @@
 norecursedirs = .git build dist doc nipype/external tools examples src
 addopts = --doctest-modules -n auto
 doctest_optionflags = ALLOW_UNICODE NORMALIZE_WHITESPACE
+env =
+    PYTHONHASHSEED=0

requirements.txt

@@ -12,6 +12,7 @@ funcsigs
 configparser
 pytest>=3.0
 pytest-xdist
+pytest-env
 mock
 pydotplus
 pydot>=1.2.3