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33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
"""
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Test machar. Given recent changes to hardcode type data, we might want to get
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rid of both MachAr and this test at some point.
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"""
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from __future__ import division, absolute_import, print_function
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from numpy.core.machar import MachAr
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import numpy.core.numerictypes as ntypes
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from numpy import errstate, array
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class TestMachAr(object):
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def _run_machar_highprec(self):
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# Instantiate MachAr instance with high enough precision to cause
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# underflow
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try:
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hiprec = ntypes.float96
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MachAr(lambda v:array([v], hiprec))
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except AttributeError:
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# Fixme, this needs to raise a 'skip' exception.
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"Skipping test: no ntypes.float96 available on this platform."
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def test_underlow(self):
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# Regression test for #759:
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# instantiating MachAr for dtype = np.float96 raises spurious warning.
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with errstate(all='raise'):
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try:
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self._run_machar_highprec()
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except FloatingPointError as e:
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msg = "Caught %s exception, should not have been raised." % e
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raise AssertionError(msg)
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