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"""
Generic test utilities and decorators.
"""
from __future__ import division, print_function, absolute_import
import os
import sys
from numpy.testing import dec
from nose import SkipTest
from scipy._lib.decorator import decorator
__all__ = ['knownfailure_overridable', 'suppressed_stdout', 'xslow']
def knownfailure_overridable(msg=None):
if not msg:
msg = "Undiagnosed issues (corner cases, wrong comparison values, or otherwise)"
msg = msg + " [Set environment variable SCIPY_XFAIL=1 to run this test nevertheless.]"
def deco(func):
try:
if bool(os.environ['SCIPY_XFAIL']):
return func
except (ValueError, KeyError):
pass
return dec.knownfailureif(True, msg)(func)
return deco
def suppressed_stdout(f):
import nose
def pwrapper(*arg, **kwargs):
oldstdout = sys.stdout
sys.stdout = open(os.devnull, 'w')
try:
return f(*arg, **kwargs)
finally:
sys.stdout.close()
sys.stdout = oldstdout
return nose.tools.make_decorator(f)(pwrapper)
@decorator
def xslow(func, *a, **kw):
try:
v = int(os.environ.get('SCIPY_XSLOW', '0'))
if not v:
raise ValueError()
except ValueError:
raise SkipTest("very slow test; set environment variable "
"SCIPY_XSLOW=1 to run it")
return func(*a, **kw)
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