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""" Testing
"""
from __future__ import division, print_function, absolute_import
import numpy as np
from numpy.testing import assert_array_equal, assert_array_almost_equal, \
run_module_suite, assert_
from scipy.io.matlab.mio_utils import squeeze_element, chars_to_strings
def test_squeeze_element():
a = np.zeros((1,3))
assert_array_equal(np.squeeze(a), squeeze_element(a))
# 0d output from squeeze gives scalar
sq_int = squeeze_element(np.zeros((1,1), dtype=float))
assert_(isinstance(sq_int, float))
# Unless it's a structured array
sq_sa = squeeze_element(np.zeros((1,1),dtype=[('f1', 'f')]))
assert_(isinstance(sq_sa, np.ndarray))
def test_chars_strings():
# chars as strings
strings = ['learn ', 'python', 'fast ', 'here ']
str_arr = np.array(strings, dtype='U6') # shape (4,)
chars = [list(s) for s in strings]
char_arr = np.array(chars, dtype='U1') # shape (4,6)
assert_array_equal(chars_to_strings(char_arr), str_arr)
ca2d = char_arr.reshape((2,2,6))
sa2d = str_arr.reshape((2,2))
assert_array_equal(chars_to_strings(ca2d), sa2d)
ca3d = char_arr.reshape((1,2,2,6))
sa3d = str_arr.reshape((1,2,2))
assert_array_equal(chars_to_strings(ca3d), sa3d)
# Fortran ordered arrays
char_arrf = np.array(chars, dtype='U1', order='F') # shape (4,6)
assert_array_equal(chars_to_strings(char_arrf), str_arr)
# empty array
arr = np.array([['']], dtype='U1')
out_arr = np.array([''], dtype='U1')
assert_array_equal(chars_to_strings(arr), out_arr)
if __name__ == "__main__":
run_module_suite()
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