import pytest
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from pandas.util._validators import validate_args
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_fname = "func"
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def test_bad_min_fname_arg_count():
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msg = "'max_fname_arg_count' must be non-negative"
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with pytest.raises(ValueError, match=msg):
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validate_args(_fname, (None,), -1, "foo")
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def test_bad_arg_length_max_value_single():
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args = (None, None)
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compat_args = ("foo",)
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min_fname_arg_count = 0
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max_length = len(compat_args) + min_fname_arg_count
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actual_length = len(args) + min_fname_arg_count
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msg = (
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rf"{_fname}\(\) takes at most {max_length} "
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rf"argument \({actual_length} given\)"
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)
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with pytest.raises(TypeError, match=msg):
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validate_args(_fname, args, min_fname_arg_count, compat_args)
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def test_bad_arg_length_max_value_multiple():
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args = (None, None)
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compat_args = {"foo": None}
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min_fname_arg_count = 2
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max_length = len(compat_args) + min_fname_arg_count
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actual_length = len(args) + min_fname_arg_count
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msg = (
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rf"{_fname}\(\) takes at most {max_length} "
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rf"arguments \({actual_length} given\)"
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)
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with pytest.raises(TypeError, match=msg):
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validate_args(_fname, args, min_fname_arg_count, compat_args)
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@pytest.mark.parametrize("i", range(1, 3))
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def test_not_all_defaults(i):
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bad_arg = "foo"
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msg = (
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f"the '{bad_arg}' parameter is not supported "
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rf"in the pandas implementation of {_fname}\(\)"
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)
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compat_args = {"foo": 2, "bar": -1, "baz": 3}
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arg_vals = (1, -1, 3)
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with pytest.raises(ValueError, match=msg):
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validate_args(_fname, arg_vals[:i], 2, compat_args)
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def test_validation():
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# No exceptions should be raised.
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validate_args(_fname, (None,), 2, {"out": None})
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compat_args = {"axis": 1, "out": None}
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validate_args(_fname, (1, None), 2, compat_args)
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