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"""
Test the scalar constructors, which also do type-coercion
"""
from __future__ import division, absolute_import, print_function
import sys
import platform
import numpy as np
from numpy.testing import (
run_module_suite,
assert_equal, assert_almost_equal, assert_raises, assert_warns,
dec
)
class TestFromString(object):
def test_floating(self):
# Ticket #640, floats from string
fsingle = np.single('1.234')
fdouble = np.double('1.234')
flongdouble = np.longdouble('1.234')
assert_almost_equal(fsingle, 1.234)
assert_almost_equal(fdouble, 1.234)
assert_almost_equal(flongdouble, 1.234)
def test_floating_overflow(self):
""" Strings containing an unrepresentable float overflow """
fhalf = np.half('1e10000')
assert_equal(fhalf, np.inf)
fsingle = np.single('1e10000')
assert_equal(fsingle, np.inf)
fdouble = np.double('1e10000')
assert_equal(fdouble, np.inf)
flongdouble = assert_warns(RuntimeWarning, np.longdouble, '1e10000')
assert_equal(flongdouble, np.inf)
fhalf = np.half('-1e10000')
assert_equal(fhalf, -np.inf)
fsingle = np.single('-1e10000')
assert_equal(fsingle, -np.inf)
fdouble = np.double('-1e10000')
assert_equal(fdouble, -np.inf)
flongdouble = assert_warns(RuntimeWarning, np.longdouble, '-1e10000')
assert_equal(flongdouble, -np.inf)
@dec.knownfailureif((sys.version_info[0] >= 3) or
(sys.platform == "win32" and
platform.architecture()[0] == "64bit"),
"numpy.intp('0xff', 16) not supported on Py3, "
"as it does not inherit from Python int")
def test_intp(self):
# Ticket #99
i_width = np.int_(0).nbytes*2 - 1
np.intp('0x' + 'f'*i_width, 16)
assert_raises(OverflowError, np.intp, '0x' + 'f'*(i_width+1), 16)
assert_raises(ValueError, np.intp, '0x1', 32)
assert_equal(255, np.intp('0xFF', 16))
class TestFromInt(object):
def test_intp(self):
# Ticket #99
assert_equal(1024, np.intp(1024))
def test_uint64_from_negative(self):
assert_equal(np.uint64(-2), np.uint64(18446744073709551614))
if __name__ == "__main__":
run_module_suite()
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