81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
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import pytest
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import numpy as np
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from numpy.testing import assert_raises_regex
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import numpy.lib._utils_impl as _utils_impl
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from io import StringIO
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def test_assert_raises_regex_context_manager():
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with assert_raises_regex(ValueError, 'no deprecation warning'):
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raise ValueError('no deprecation warning')
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def test_info_method_heading():
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# info(class) should only print "Methods:" heading if methods exist
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class NoPublicMethods:
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pass
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class WithPublicMethods:
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def first_method():
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pass
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def _has_method_heading(cls):
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out = StringIO()
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np.info(cls, output=out)
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return 'Methods:' in out.getvalue()
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assert _has_method_heading(WithPublicMethods)
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assert not _has_method_heading(NoPublicMethods)
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def test_drop_metadata():
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def _compare_dtypes(dt1, dt2):
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return np.can_cast(dt1, dt2, casting='no')
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# structured dtype
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dt = np.dtype([('l1', [('l2', np.dtype('S8', metadata={'msg': 'toto'}))])],
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metadata={'msg': 'titi'})
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dt_m = _utils_impl.drop_metadata(dt)
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assert _compare_dtypes(dt, dt_m) is True
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assert dt_m.metadata is None
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assert dt_m['l1'].metadata is None
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assert dt_m['l1']['l2'].metadata is None
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# alignment
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dt = np.dtype([('x', '<f8'), ('y', '<i4')],
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align=True,
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metadata={'msg': 'toto'})
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dt_m = _utils_impl.drop_metadata(dt)
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assert _compare_dtypes(dt, dt_m) is True
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assert dt_m.metadata is None
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# subdtype
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dt = np.dtype('8f',
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metadata={'msg': 'toto'})
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dt_m = _utils_impl.drop_metadata(dt)
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assert _compare_dtypes(dt, dt_m) is True
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assert dt_m.metadata is None
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# scalar
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dt = np.dtype('uint32',
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metadata={'msg': 'toto'})
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dt_m = _utils_impl.drop_metadata(dt)
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assert _compare_dtypes(dt, dt_m) is True
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assert dt_m.metadata is None
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@pytest.mark.parametrize("dtype",
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[np.dtype("i,i,i,i")[["f1", "f3"]],
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np.dtype("f8"),
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np.dtype("10i")])
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def test_drop_metadata_identity_and_copy(dtype):
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# If there is no metadata, the identity is preserved:
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assert _utils_impl.drop_metadata(dtype) is dtype
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# If there is any, it is dropped (subforms are checked above)
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dtype = np.dtype(dtype, metadata={1: 2})
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assert _utils_impl.drop_metadata(dtype).metadata is None
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