How can mock.assert_called_once() be told to accept any instance of an object?

Question

I have some code which is calling Mock assert_called_one_with() .

  import mock
  with mock.patch.object(myfile.Sheet,  'WriteData', autospec=True) as mock_sheets:
    somefile.ExportToSheets(query, 'api_key', 'sheet_id', 'A1')
    mock_sheets.assert_called_once_with(myfile.Sheet(), 'A1', [('a', 'b'), (1, 2)])

As you can see, everything compares equally except for the object instance.

AssertionError: Expected call: \
WriteData(<myfile.Sheet object at 0x7f9d487923c8>, 'A1', [('a', 'b'), ('1', '2')])
Actual call: \
WriteData(<myfile.Sheet object at 0x7f9d47bafb38>, 'A1', [('a', 'b'), ('1', '2')])

How can I either

• tell assert_called_once_with() to ignore object identity, or
• perform a similar assertion?

Answer 1

mock.ANY will match any value

mock_sheets.assert_called_once_with(mock.ANY, 'A1', [('a', 'b'), (1, 2)])