def test_with_values(self):
"""Provide values for ``somedict`` and ``mapping``.
Ensure that keys are updated correctly. Also, the output should be a
copy of the input, so make sure that the input value does not change.
"""
somedict = {1: 2, 3: 4}
self.assertEqual(
{0: 2, 3: 4},
factory._copy_and_update_keys(somedict, ((1, 0),))
)
self.assertEqual({1: 2, 3: 4}, somedict)
self.assertEqual(
{0: 2, 'foo': 4},
factory._copy_and_update_keys(somedict, ((1, 0), (3, 'foo')))
)
self.assertEqual({1: 2, 3: 4}, somedict)
def test_empty_mapping(self):
"""Provide an empty value for ``mapping``."""
self.assertEqual(
{1: 2, 3: 4},
factory._copy_and_update_keys({1: 2, 3: 4}, tuple())
)
def test_empty_somedict(self):
"""Provide an empty value for ``somedict``."""
self.assertEqual(
{},
factory._copy_and_update_keys({}, (('foo', 'bar'), (1, 2)))
)
def test_empty_args(self):
"""Provide empty values for ``somedict`` and ``mapping``."""
self.assertEqual(
{},
factory._copy_and_update_keys({}, tuple())
)
