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229 lines
6.3 KiB
229 lines
6.3 KiB
import inspect
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import sys
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import pytest
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import numpy as np
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from numpy.core import arange
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from numpy.testing import assert_, assert_equal, assert_raises_regex
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from numpy.lib import deprecate, deprecate_with_doc
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import numpy.lib.utils as utils
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from io import StringIO
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@pytest.mark.skipif(sys.flags.optimize == 2, reason="Python running -OO")
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@pytest.mark.skipif(
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sys.version_info == (3, 10, 0, "candidate", 1),
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reason="Broken as of bpo-44524",
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)
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def test_lookfor():
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out = StringIO()
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utils.lookfor('eigenvalue', module='numpy', output=out,
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import_modules=False)
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out = out.getvalue()
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assert_('numpy.linalg.eig' in out)
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@deprecate
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def old_func(self, x):
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return x
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@deprecate(message="Rather use new_func2")
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def old_func2(self, x):
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return x
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def old_func3(self, x):
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return x
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new_func3 = deprecate(old_func3, old_name="old_func3", new_name="new_func3")
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def old_func4(self, x):
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"""Summary.
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Further info.
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"""
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return x
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new_func4 = deprecate(old_func4)
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def old_func5(self, x):
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"""Summary.
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Bizarre indentation.
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"""
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return x
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new_func5 = deprecate(old_func5, message="This function is\ndeprecated.")
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def old_func6(self, x):
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"""
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Also in PEP-257.
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"""
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return x
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new_func6 = deprecate(old_func6)
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@deprecate_with_doc(msg="Rather use new_func7")
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def old_func7(self,x):
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return x
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def test_deprecate_decorator():
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assert_('deprecated' in old_func.__doc__)
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def test_deprecate_decorator_message():
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assert_('Rather use new_func2' in old_func2.__doc__)
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def test_deprecate_fn():
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assert_('old_func3' in new_func3.__doc__)
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assert_('new_func3' in new_func3.__doc__)
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def test_deprecate_with_doc_decorator_message():
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assert_('Rather use new_func7' in old_func7.__doc__)
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@pytest.mark.skipif(sys.flags.optimize == 2, reason="-OO discards docstrings")
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@pytest.mark.parametrize('old_func, new_func', [
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(old_func4, new_func4),
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(old_func5, new_func5),
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(old_func6, new_func6),
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])
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def test_deprecate_help_indentation(old_func, new_func):
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_compare_docs(old_func, new_func)
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# Ensure we don't mess up the indentation
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for knd, func in (('old', old_func), ('new', new_func)):
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for li, line in enumerate(func.__doc__.split('\n')):
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if li == 0:
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assert line.startswith(' ') or not line.startswith(' '), knd
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elif line:
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assert line.startswith(' '), knd
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def _compare_docs(old_func, new_func):
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old_doc = inspect.getdoc(old_func)
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new_doc = inspect.getdoc(new_func)
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index = new_doc.index('\n\n') + 2
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assert_equal(new_doc[index:], old_doc)
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@pytest.mark.skipif(sys.flags.optimize == 2, reason="-OO discards docstrings")
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def test_deprecate_preserve_whitespace():
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assert_('\n Bizarre' in new_func5.__doc__)
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def test_deprecate_module():
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assert_(old_func.__module__ == __name__)
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def test_safe_eval_nameconstant():
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# Test if safe_eval supports Python 3.4 _ast.NameConstant
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utils.safe_eval('None')
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class TestByteBounds:
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def test_byte_bounds(self):
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# pointer difference matches size * itemsize
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# due to contiguity
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a = arange(12).reshape(3, 4)
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low, high = utils.byte_bounds(a)
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assert_equal(high - low, a.size * a.itemsize)
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def test_unusual_order_positive_stride(self):
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a = arange(12).reshape(3, 4)
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b = a.T
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low, high = utils.byte_bounds(b)
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assert_equal(high - low, b.size * b.itemsize)
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def test_unusual_order_negative_stride(self):
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a = arange(12).reshape(3, 4)
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b = a.T[::-1]
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low, high = utils.byte_bounds(b)
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assert_equal(high - low, b.size * b.itemsize)
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def test_strided(self):
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a = arange(12)
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b = a[::2]
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low, high = utils.byte_bounds(b)
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# the largest pointer address is lost (even numbers only in the
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# stride), and compensate addresses for striding by 2
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assert_equal(high - low, b.size * 2 * b.itemsize - b.itemsize)
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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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utils.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.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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# alignement
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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.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.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.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.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.drop_metadata(dtype).metadata is None
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