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58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
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# Tests aimed at pandas.core.indexers
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import numpy as np
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import pytest
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from pandas.core.indexers import is_scalar_indexer, length_of_indexer, validate_indices
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def test_length_of_indexer():
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arr = np.zeros(4, dtype=bool)
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arr[0] = 1
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result = length_of_indexer(arr)
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assert result == 1
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def test_is_scalar_indexer():
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indexer = (0, 1)
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assert is_scalar_indexer(indexer, 2)
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assert not is_scalar_indexer(indexer[0], 2)
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indexer = (np.array([2]), 1)
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assert is_scalar_indexer(indexer, 2)
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indexer = (np.array([2]), np.array([3]))
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assert is_scalar_indexer(indexer, 2)
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indexer = (np.array([2]), np.array([3, 4]))
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assert not is_scalar_indexer(indexer, 2)
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assert not is_scalar_indexer(slice(None), 1)
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indexer = 0
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assert is_scalar_indexer(indexer, 1)
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indexer = (0,)
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assert is_scalar_indexer(indexer, 1)
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class TestValidateIndices:
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def test_validate_indices_ok(self):
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indices = np.asarray([0, 1])
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validate_indices(indices, 2)
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validate_indices(indices[:0], 0)
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validate_indices(np.array([-1, -1]), 0)
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def test_validate_indices_low(self):
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indices = np.asarray([0, -2])
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with pytest.raises(ValueError, match="'indices' contains"):
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validate_indices(indices, 2)
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def test_validate_indices_high(self):
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indices = np.asarray([0, 1, 2])
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with pytest.raises(IndexError, match="indices are out"):
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validate_indices(indices, 2)
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def test_validate_indices_empty(self):
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with pytest.raises(IndexError, match="indices are out"):
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validate_indices(np.array([0, 1]), 0)
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