File: argerrors.py

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# mode: run
# tag: kwargs, argument unpacking

# This test validates the error handling in the different specialised
# code paths of the argument unpacking code.  The have-kwargs and
# no-kwargs branches take different paths, so we always test with and
# without a keyword dict (even if it's empty).

def test_single_arg(a):
    """
    >>> test_single_arg(1)
    1
    >>> test_single_arg(1, **{})
    1
    >>> test_single_arg()                  # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(1,2)               # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(1,2, **{})         # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(**{})              # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(*(), **{})         # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(**{'b':2})         # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_single_arg(**{'a':1, 'b':2})  # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    """
    return a

def test_two_args(a,b):
    """
    >>> test_two_args(1,2)
    (1, 2)
    >>> test_two_args(1,2, **{})
    (1, 2)
    >>> test_two_args(1,**{'b':2})
    (1, 2)
    >>> test_two_args(**{'a':1, 'b':2})
    (1, 2)
    >>> test_two_args()                 # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(1)                # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(1, **{})          # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(1,2,3)            # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(1,2,3, **{})      # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(**{})             # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(*(), **{})        # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(**{'a':1})        # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    >>> test_two_args(**{'a':1, 'b':2, 'c':3})  # doctest: +ELLIPSIS
    Traceback (most recent call last):
    TypeError: ...
    """
    return a,b