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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/pylint-dev/astroid/blob/main/LICENSE
# Copyright (c) https://github.com/pylint-dev/astroid/blob/main/CONTRIBUTORS.txt
import pytest
try:
import numpy # pylint: disable=unused-import
HAS_NUMPY = True
except ImportError:
HAS_NUMPY = False
from astroid import builder
@pytest.mark.skipif(HAS_NUMPY is False, reason="This test requires the numpy library.")
class TestBrainNumpyMa:
"""Test the numpy ma brain module."""
def _assert_maskedarray(self, code):
node = builder.extract_node(code)
cls_node = node.inferred()[0]
assert cls_node.pytype() == "numpy.ma.core.MaskedArray"
@pytest.mark.parametrize("alias_import", [True, False])
@pytest.mark.parametrize("ma_function", ["masked_invalid", "masked_where"])
def test_numpy_ma_returns_maskedarray(self, alias_import, ma_function):
"""
Test that calls to numpy ma functions return a MaskedArray object.
The `ma_function` node is an Attribute or a Name
"""
import_str = (
"import numpy as np"
if alias_import
else f"from numpy.ma import {ma_function}"
)
func = f"np.ma.{ma_function}" if alias_import else ma_function
src = f"""
{import_str}
data = np.ndarray((1,2))
{func}([1, 0, 0], data)
"""
self._assert_maskedarray(src)
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