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87 lines
2.5 KiB
Python
87 lines
2.5 KiB
Python
import os
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import numpy as np
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import tempfile
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from pytest import raises as assert_raises
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from numpy.testing import assert_equal, assert_
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from scipy.sparse import (csc_matrix, csr_matrix, bsr_matrix, dia_matrix,
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coo_matrix, save_npz, load_npz, dok_matrix)
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DATA_DIR = os.path.join(os.path.dirname(__file__), 'data')
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def _save_and_load(matrix):
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fd, tmpfile = tempfile.mkstemp(suffix='.npz')
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os.close(fd)
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try:
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save_npz(tmpfile, matrix)
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loaded_matrix = load_npz(tmpfile)
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finally:
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os.remove(tmpfile)
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return loaded_matrix
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def _check_save_and_load(dense_matrix):
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for matrix_class in [csc_matrix, csr_matrix, bsr_matrix, dia_matrix, coo_matrix]:
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matrix = matrix_class(dense_matrix)
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loaded_matrix = _save_and_load(matrix)
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assert_(type(loaded_matrix) is matrix_class)
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assert_(loaded_matrix.shape == dense_matrix.shape)
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assert_(loaded_matrix.dtype == dense_matrix.dtype)
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assert_equal(loaded_matrix.toarray(), dense_matrix)
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def test_save_and_load_random():
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N = 10
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np.random.seed(0)
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dense_matrix = np.random.random((N, N))
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dense_matrix[dense_matrix > 0.7] = 0
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_check_save_and_load(dense_matrix)
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def test_save_and_load_empty():
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dense_matrix = np.zeros((4,6))
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_check_save_and_load(dense_matrix)
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def test_save_and_load_one_entry():
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dense_matrix = np.zeros((4,6))
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dense_matrix[1,2] = 1
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_check_save_and_load(dense_matrix)
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def test_malicious_load():
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class Executor(object):
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def __reduce__(self):
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return (assert_, (False, 'unexpected code execution'))
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fd, tmpfile = tempfile.mkstemp(suffix='.npz')
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os.close(fd)
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try:
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np.savez(tmpfile, format=Executor())
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# Should raise a ValueError, not execute code
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assert_raises(ValueError, load_npz, tmpfile)
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finally:
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os.remove(tmpfile)
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def test_py23_compatibility():
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# Try loading files saved on Python 2 and Python 3. They are not
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# the same, since files saved with SciPy versions < 1.0.0 may
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# contain unicode.
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a = load_npz(os.path.join(DATA_DIR, 'csc_py2.npz'))
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b = load_npz(os.path.join(DATA_DIR, 'csc_py3.npz'))
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c = csc_matrix([[0]])
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assert_equal(a.toarray(), c.toarray())
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assert_equal(b.toarray(), c.toarray())
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def test_implemented_error():
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# Attempts to save an unsupported type and checks that an
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# NotImplementedError is raised.
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x = dok_matrix((2,3))
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x[0,1] = 1
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assert_raises(NotImplementedError, save_npz, 'x.npz', x)
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