def test_without_parameters():
sig = Signature([Parameter('foo'), Parameter('bar'), Parameter('baz')])
expected = Signature([Parameter('bar')])
result = sig.without_parameters(0, 'baz')
assert result == expected
def test_replace():
sig = Signature([Parameter('foo')], return_annotation=int)
expected = Signature(return_annotation=str)
result = sig.replace(parameters=[], return_annotation=str)
assert isinstance(result, Signature)
assert result == expected
def test_num_required_arguments():
sig = Signature([
Parameter('a', Parameter.POSITIONAL_ONLY),
Parameter('b', Parameter.VAR_POSITIONAL),
Parameter('c', Parameter.KEYWORD_ONLY),
Parameter('d', Parameter.VAR_KEYWORD)
])
assert sig.num_required_arguments == 2
'd': 'D'
}, {
'a': ('A', 'B'),
'c': {
'd': 'D'
}
}),
])
def test_bind_partial(func, args, kwargs, expected_result):
sig = Signature.from_callable(func)
assert sig.bind_partial(*args, **kwargs).arguments == expected_result
@pytest.mark.parametrize('signature, expected', [
(Signature([
Parameter('a', Parameter.POSITIONAL_ONLY),
Parameter('b', Parameter.VAR_POSITIONAL)
]), '(a, /, *b)'),
(Signature([
Parameter('a', Parameter.POSITIONAL_ONLY),
Parameter('b', Parameter.POSITIONAL_ONLY)
]), '(a, b, /)'),
(Signature([Parameter('a', default=Parameter.missing)]), '([a])'),
(Signature([
Parameter('a', Parameter.POSITIONAL_ONLY, default=Parameter.missing)
]), '([a], /)'),
(Signature([
Parameter('a', Parameter.POSITIONAL_ONLY, default=Parameter.missing),
Parameter('b', default=Parameter.missing)
]), '([a], /[, b])'),
(Signature([
Parameter('a', Parameter.POSITIONAL_ONLY, default=Parameter.missing),