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