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397 lines
13 KiB
Python
397 lines
13 KiB
Python
from __future__ import division, absolute_import, print_function
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import sys
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import numpy as np
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from numpy.compat import unicode
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from numpy.testing import assert_, assert_equal, assert_array_equal
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# Guess the UCS length for this python interpreter
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if sys.version_info[:2] >= (3, 3):
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# Python 3.3 uses a flexible string representation
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ucs4 = False
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def buffer_length(arr):
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if isinstance(arr, unicode):
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arr = str(arr)
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if not arr:
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charmax = 0
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else:
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charmax = max([ord(c) for c in arr])
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if charmax < 256:
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size = 1
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elif charmax < 65536:
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size = 2
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else:
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size = 4
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return size * len(arr)
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v = memoryview(arr)
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if v.shape is None:
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return len(v) * v.itemsize
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else:
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return np.prod(v.shape) * v.itemsize
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else:
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if len(buffer(u'u')) == 4:
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ucs4 = True
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else:
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ucs4 = False
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def buffer_length(arr):
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if isinstance(arr, np.ndarray):
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return len(arr.data)
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return len(buffer(arr))
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# In both cases below we need to make sure that the byte swapped value (as
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# UCS4) is still a valid unicode:
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# Value that can be represented in UCS2 interpreters
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ucs2_value = u'\u0900'
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# Value that cannot be represented in UCS2 interpreters (but can in UCS4)
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ucs4_value = u'\U00100900'
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def test_string_cast():
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str_arr = np.array(["1234", "1234\0\0"], dtype='S')
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uni_arr1 = str_arr.astype('>U')
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uni_arr2 = str_arr.astype('<U')
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if sys.version_info[0] < 3:
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assert_array_equal(str_arr, uni_arr1)
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assert_array_equal(str_arr, uni_arr2)
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else:
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assert_(str_arr != uni_arr1)
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assert_(str_arr != uni_arr2)
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assert_array_equal(uni_arr1, uni_arr2)
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############################################################
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# Creation tests
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############################################################
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class CreateZeros(object):
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"""Check the creation of zero-valued arrays"""
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def content_check(self, ua, ua_scalar, nbytes):
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# Check the length of the unicode base type
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assert_(int(ua.dtype.str[2:]) == self.ulen)
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# Check the length of the data buffer
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assert_(buffer_length(ua) == nbytes)
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# Small check that data in array element is ok
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assert_(ua_scalar == u'')
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# Encode to ascii and double check
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assert_(ua_scalar.encode('ascii') == b'')
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# Check buffer lengths for scalars
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if ucs4:
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assert_(buffer_length(ua_scalar) == 0)
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else:
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assert_(buffer_length(ua_scalar) == 0)
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def test_zeros0D(self):
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# Check creation of 0-dimensional objects
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ua = np.zeros((), dtype='U%s' % self.ulen)
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self.content_check(ua, ua[()], 4*self.ulen)
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def test_zerosSD(self):
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# Check creation of single-dimensional objects
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ua = np.zeros((2,), dtype='U%s' % self.ulen)
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self.content_check(ua, ua[0], 4*self.ulen*2)
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self.content_check(ua, ua[1], 4*self.ulen*2)
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def test_zerosMD(self):
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# Check creation of multi-dimensional objects
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ua = np.zeros((2, 3, 4), dtype='U%s' % self.ulen)
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self.content_check(ua, ua[0, 0, 0], 4*self.ulen*2*3*4)
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self.content_check(ua, ua[-1, -1, -1], 4*self.ulen*2*3*4)
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class TestCreateZeros_1(CreateZeros):
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"""Check the creation of zero-valued arrays (size 1)"""
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ulen = 1
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class TestCreateZeros_2(CreateZeros):
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"""Check the creation of zero-valued arrays (size 2)"""
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ulen = 2
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class TestCreateZeros_1009(CreateZeros):
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"""Check the creation of zero-valued arrays (size 1009)"""
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ulen = 1009
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class CreateValues(object):
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"""Check the creation of unicode arrays with values"""
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def content_check(self, ua, ua_scalar, nbytes):
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# Check the length of the unicode base type
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assert_(int(ua.dtype.str[2:]) == self.ulen)
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# Check the length of the data buffer
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assert_(buffer_length(ua) == nbytes)
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# Small check that data in array element is ok
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assert_(ua_scalar == self.ucs_value*self.ulen)
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# Encode to UTF-8 and double check
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assert_(ua_scalar.encode('utf-8') ==
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(self.ucs_value*self.ulen).encode('utf-8'))
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# Check buffer lengths for scalars
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if ucs4:
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assert_(buffer_length(ua_scalar) == 4*self.ulen)
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else:
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if self.ucs_value == ucs4_value:
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# In UCS2, the \U0010FFFF will be represented using a
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# surrogate *pair*
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assert_(buffer_length(ua_scalar) == 2*2*self.ulen)
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else:
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# In UCS2, the \uFFFF will be represented using a
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# regular 2-byte word
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assert_(buffer_length(ua_scalar) == 2*self.ulen)
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def test_values0D(self):
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# Check creation of 0-dimensional objects with values
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ua = np.array(self.ucs_value*self.ulen, dtype='U%s' % self.ulen)
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self.content_check(ua, ua[()], 4*self.ulen)
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def test_valuesSD(self):
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# Check creation of single-dimensional objects with values
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ua = np.array([self.ucs_value*self.ulen]*2, dtype='U%s' % self.ulen)
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self.content_check(ua, ua[0], 4*self.ulen*2)
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self.content_check(ua, ua[1], 4*self.ulen*2)
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def test_valuesMD(self):
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# Check creation of multi-dimensional objects with values
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ua = np.array([[[self.ucs_value*self.ulen]*2]*3]*4, dtype='U%s' % self.ulen)
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self.content_check(ua, ua[0, 0, 0], 4*self.ulen*2*3*4)
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self.content_check(ua, ua[-1, -1, -1], 4*self.ulen*2*3*4)
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class TestCreateValues_1_UCS2(CreateValues):
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"""Check the creation of valued arrays (size 1, UCS2 values)"""
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ulen = 1
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ucs_value = ucs2_value
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class TestCreateValues_1_UCS4(CreateValues):
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"""Check the creation of valued arrays (size 1, UCS4 values)"""
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ulen = 1
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ucs_value = ucs4_value
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class TestCreateValues_2_UCS2(CreateValues):
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"""Check the creation of valued arrays (size 2, UCS2 values)"""
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ulen = 2
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ucs_value = ucs2_value
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class TestCreateValues_2_UCS4(CreateValues):
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"""Check the creation of valued arrays (size 2, UCS4 values)"""
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ulen = 2
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ucs_value = ucs4_value
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class TestCreateValues_1009_UCS2(CreateValues):
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"""Check the creation of valued arrays (size 1009, UCS2 values)"""
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ulen = 1009
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ucs_value = ucs2_value
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class TestCreateValues_1009_UCS4(CreateValues):
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"""Check the creation of valued arrays (size 1009, UCS4 values)"""
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ulen = 1009
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ucs_value = ucs4_value
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############################################################
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# Assignment tests
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############################################################
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class AssignValues(object):
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"""Check the assignment of unicode arrays with values"""
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def content_check(self, ua, ua_scalar, nbytes):
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# Check the length of the unicode base type
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assert_(int(ua.dtype.str[2:]) == self.ulen)
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# Check the length of the data buffer
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assert_(buffer_length(ua) == nbytes)
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# Small check that data in array element is ok
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assert_(ua_scalar == self.ucs_value*self.ulen)
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# Encode to UTF-8 and double check
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assert_(ua_scalar.encode('utf-8') ==
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(self.ucs_value*self.ulen).encode('utf-8'))
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# Check buffer lengths for scalars
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if ucs4:
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assert_(buffer_length(ua_scalar) == 4*self.ulen)
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else:
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if self.ucs_value == ucs4_value:
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# In UCS2, the \U0010FFFF will be represented using a
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# surrogate *pair*
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assert_(buffer_length(ua_scalar) == 2*2*self.ulen)
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else:
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# In UCS2, the \uFFFF will be represented using a
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# regular 2-byte word
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assert_(buffer_length(ua_scalar) == 2*self.ulen)
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def test_values0D(self):
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# Check assignment of 0-dimensional objects with values
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ua = np.zeros((), dtype='U%s' % self.ulen)
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ua[()] = self.ucs_value*self.ulen
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self.content_check(ua, ua[()], 4*self.ulen)
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def test_valuesSD(self):
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# Check assignment of single-dimensional objects with values
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ua = np.zeros((2,), dtype='U%s' % self.ulen)
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ua[0] = self.ucs_value*self.ulen
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self.content_check(ua, ua[0], 4*self.ulen*2)
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ua[1] = self.ucs_value*self.ulen
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self.content_check(ua, ua[1], 4*self.ulen*2)
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def test_valuesMD(self):
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# Check assignment of multi-dimensional objects with values
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ua = np.zeros((2, 3, 4), dtype='U%s' % self.ulen)
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ua[0, 0, 0] = self.ucs_value*self.ulen
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self.content_check(ua, ua[0, 0, 0], 4*self.ulen*2*3*4)
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ua[-1, -1, -1] = self.ucs_value*self.ulen
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self.content_check(ua, ua[-1, -1, -1], 4*self.ulen*2*3*4)
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class TestAssignValues_1_UCS2(AssignValues):
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"""Check the assignment of valued arrays (size 1, UCS2 values)"""
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ulen = 1
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ucs_value = ucs2_value
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class TestAssignValues_1_UCS4(AssignValues):
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"""Check the assignment of valued arrays (size 1, UCS4 values)"""
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ulen = 1
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ucs_value = ucs4_value
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class TestAssignValues_2_UCS2(AssignValues):
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"""Check the assignment of valued arrays (size 2, UCS2 values)"""
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ulen = 2
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ucs_value = ucs2_value
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class TestAssignValues_2_UCS4(AssignValues):
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"""Check the assignment of valued arrays (size 2, UCS4 values)"""
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ulen = 2
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ucs_value = ucs4_value
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class TestAssignValues_1009_UCS2(AssignValues):
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"""Check the assignment of valued arrays (size 1009, UCS2 values)"""
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ulen = 1009
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ucs_value = ucs2_value
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class TestAssignValues_1009_UCS4(AssignValues):
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"""Check the assignment of valued arrays (size 1009, UCS4 values)"""
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ulen = 1009
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ucs_value = ucs4_value
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############################################################
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# Byteorder tests
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############################################################
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class ByteorderValues(object):
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"""Check the byteorder of unicode arrays in round-trip conversions"""
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def test_values0D(self):
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# Check byteorder of 0-dimensional objects
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ua = np.array(self.ucs_value*self.ulen, dtype='U%s' % self.ulen)
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ua2 = ua.newbyteorder()
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# This changes the interpretation of the data region (but not the
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# actual data), therefore the returned scalars are not
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# the same (they are byte-swapped versions of each other).
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assert_(ua[()] != ua2[()])
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ua3 = ua2.newbyteorder()
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# Arrays must be equal after the round-trip
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assert_equal(ua, ua3)
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def test_valuesSD(self):
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# Check byteorder of single-dimensional objects
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ua = np.array([self.ucs_value*self.ulen]*2, dtype='U%s' % self.ulen)
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ua2 = ua.newbyteorder()
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assert_((ua != ua2).all())
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assert_(ua[-1] != ua2[-1])
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ua3 = ua2.newbyteorder()
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# Arrays must be equal after the round-trip
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assert_equal(ua, ua3)
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def test_valuesMD(self):
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# Check byteorder of multi-dimensional objects
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ua = np.array([[[self.ucs_value*self.ulen]*2]*3]*4,
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dtype='U%s' % self.ulen)
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ua2 = ua.newbyteorder()
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assert_((ua != ua2).all())
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assert_(ua[-1, -1, -1] != ua2[-1, -1, -1])
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ua3 = ua2.newbyteorder()
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# Arrays must be equal after the round-trip
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assert_equal(ua, ua3)
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def test_values_cast(self):
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# Check byteorder of when casting the array for a strided and
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# contiguous array:
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test1 = np.array([self.ucs_value*self.ulen]*2, dtype='U%s' % self.ulen)
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test2 = np.repeat(test1, 2)[::2]
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for ua in (test1, test2):
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ua2 = ua.astype(dtype=ua.dtype.newbyteorder())
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assert_((ua == ua2).all())
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assert_(ua[-1] == ua2[-1])
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ua3 = ua2.astype(dtype=ua.dtype)
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# Arrays must be equal after the round-trip
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assert_equal(ua, ua3)
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def test_values_updowncast(self):
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# Check byteorder of when casting the array to a longer and shorter
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# string length for strided and contiguous arrays
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test1 = np.array([self.ucs_value*self.ulen]*2, dtype='U%s' % self.ulen)
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test2 = np.repeat(test1, 2)[::2]
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for ua in (test1, test2):
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# Cast to a longer type with zero padding
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longer_type = np.dtype('U%s' % (self.ulen+1)).newbyteorder()
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ua2 = ua.astype(dtype=longer_type)
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assert_((ua == ua2).all())
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assert_(ua[-1] == ua2[-1])
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# Cast back again with truncating:
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ua3 = ua2.astype(dtype=ua.dtype)
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# Arrays must be equal after the round-trip
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assert_equal(ua, ua3)
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class TestByteorder_1_UCS2(ByteorderValues):
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"""Check the byteorder in unicode (size 1, UCS2 values)"""
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ulen = 1
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ucs_value = ucs2_value
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class TestByteorder_1_UCS4(ByteorderValues):
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"""Check the byteorder in unicode (size 1, UCS4 values)"""
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ulen = 1
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ucs_value = ucs4_value
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class TestByteorder_2_UCS2(ByteorderValues):
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"""Check the byteorder in unicode (size 2, UCS2 values)"""
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ulen = 2
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ucs_value = ucs2_value
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class TestByteorder_2_UCS4(ByteorderValues):
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"""Check the byteorder in unicode (size 2, UCS4 values)"""
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ulen = 2
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ucs_value = ucs4_value
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class TestByteorder_1009_UCS2(ByteorderValues):
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"""Check the byteorder in unicode (size 1009, UCS2 values)"""
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ulen = 1009
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ucs_value = ucs2_value
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class TestByteorder_1009_UCS4(ByteorderValues):
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"""Check the byteorder in unicode (size 1009, UCS4 values)"""
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ulen = 1009
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ucs_value = ucs4_value
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