def can_take_kwargs(self):
c = Context()
c.add_arg(names=('foo', 'bar'))
assert c.has_arg('foo') and c.has_arg('bar')
def returns_True_if_flag_is_valid_arg(self):
c = Context()
c.add_arg(Argument(names=('foo',)))
eq_(c.has_arg('foo'), True)
def can_take_name_arg(self):
c = Context()
c.add_arg('foo')
assert c.has_arg('foo')