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from numpy.testing import NumpyTestCase, NumpyTest
from numpy.lib.machar import MachAr
import numpy.core.numerictypes as ntypes
from numpy import seterr, array
class TestMachAr(NumpyTestCase):
def _run_machar_highprec(self):
# Instanciate MachAr instance with high enough precision to cause
# underflow
try:
hiprec = ntypes.float96
machar = MachAr(lambda v:array([v], hiprec))
except AttributeError:
"Skipping test: no nyptes.float96 available on this platform."
def test_underlow(self):
"""Regression testing for #759: instanciating MachAr for dtype =
np.float96 raises spurious warning."""
serrstate = seterr(all='raise')
try:
try:
self._run_machar_highprec()
except FloatingPointError, e:
self.fail("Caught %s exception, should not have been raised." % e)
finally:
seterr(**serrstate)
if __name__ == "__main__":
NumpyTest().run()
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