import pytest
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from pandas import Index
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import pandas._testing as tm
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def test_add_prefix_suffix(string_series):
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with_prefix = string_series.add_prefix("foo#")
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expected = Index([f"foo#{c}" for c in string_series.index])
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tm.assert_index_equal(with_prefix.index, expected)
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with_suffix = string_series.add_suffix("#foo")
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expected = Index([f"{c}#foo" for c in string_series.index])
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tm.assert_index_equal(with_suffix.index, expected)
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with_pct_prefix = string_series.add_prefix("%")
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expected = Index([f"%{c}" for c in string_series.index])
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tm.assert_index_equal(with_pct_prefix.index, expected)
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with_pct_suffix = string_series.add_suffix("%")
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expected = Index([f"{c}%" for c in string_series.index])
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tm.assert_index_equal(with_pct_suffix.index, expected)
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def test_add_prefix_suffix_axis(string_series):
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# GH 47819
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with_prefix = string_series.add_prefix("foo#", axis=0)
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expected = Index([f"foo#{c}" for c in string_series.index])
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tm.assert_index_equal(with_prefix.index, expected)
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with_pct_suffix = string_series.add_suffix("#foo", axis=0)
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expected = Index([f"{c}#foo" for c in string_series.index])
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tm.assert_index_equal(with_pct_suffix.index, expected)
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def test_add_prefix_suffix_invalid_axis(string_series):
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with pytest.raises(ValueError, match="No axis named 1 for object type Series"):
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string_series.add_prefix("foo#", axis=1)
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with pytest.raises(ValueError, match="No axis named 1 for object type Series"):
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string_series.add_suffix("foo#", axis=1)
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