46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
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""" Testing
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"""
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import numpy as np
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from numpy.testing import assert_array_equal, assert_
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from scipy.io.matlab._mio_utils import squeeze_element, chars_to_strings
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def test_squeeze_element():
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a = np.zeros((1,3))
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assert_array_equal(np.squeeze(a), squeeze_element(a))
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# 0-D output from squeeze gives scalar
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sq_int = squeeze_element(np.zeros((1,1), dtype=float))
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assert_(isinstance(sq_int, float))
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# Unless it's a structured array
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sq_sa = squeeze_element(np.zeros((1,1),dtype=[('f1', 'f')]))
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assert_(isinstance(sq_sa, np.ndarray))
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# Squeezing empty arrays maintain their dtypes.
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sq_empty = squeeze_element(np.empty(0, np.uint8))
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assert sq_empty.dtype == np.uint8
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def test_chars_strings():
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# chars as strings
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strings = ['learn ', 'python', 'fast ', 'here ']
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str_arr = np.array(strings, dtype='U6') # shape (4,)
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chars = [list(s) for s in strings]
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char_arr = np.array(chars, dtype='U1') # shape (4,6)
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assert_array_equal(chars_to_strings(char_arr), str_arr)
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ca2d = char_arr.reshape((2,2,6))
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sa2d = str_arr.reshape((2,2))
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assert_array_equal(chars_to_strings(ca2d), sa2d)
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ca3d = char_arr.reshape((1,2,2,6))
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sa3d = str_arr.reshape((1,2,2))
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assert_array_equal(chars_to_strings(ca3d), sa3d)
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# Fortran ordered arrays
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char_arrf = np.array(chars, dtype='U1', order='F') # shape (4,6)
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assert_array_equal(chars_to_strings(char_arrf), str_arr)
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# empty array
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arr = np.array([['']], dtype='U1')
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out_arr = np.array([''], dtype='U1')
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assert_array_equal(chars_to_strings(arr), out_arr)
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