def test_var_fails():
def src(*args, **kwargs):
pass
def dest(*args, **kwargs):
pass
with pytest.raises(ValueError):
merge_args._merge(src, dest)
def test_positional_only():
from tests.posonly import old, new
assert str(signature(new)) == '(prefix, foo, /, *args, **kwargs)'
new = merge_args._merge(old, new)
assert str(signature(new)) == '(prefix, foo, /, bar)'
def test_orig():
def old(foo, bar):
"""This is old's docstring."""
return foo + bar
def new(prefix, foo, *args, **kwargs):
return old(prefix + foo, *args, **kwargs)
assert str(signature(new)) == '(prefix, foo, *args, **kwargs)'
new = merge_args._merge(old, new)
assert str(signature(new)) == '(prefix, foo, bar)'
assert new.__doc__ == old.__doc__
assert new.__doc__
assert old('a', 'b') == 'ab'
assert new('!', 'a', 'b') == '!ab'