Different test names with different runs

[redixin]

Lets take a look at this simple test:

import unittest
import mock
from ddt import ddt, data

@ddt
class Test(unittest.TestCase):
    @data(mock.Mock())
    def test_dict(self, value):
        pass

This lead to different test names with different runs:

test_dict_1__Mock_id__139806852956624__ (tests.test_d.Test) ... ok
test_dict_1__Mock_id__140027200111056__ (tests.test_d.Test) ... ok

This is serious problem when running tests by testr.

Testr generates a list of all tests and divides it into N parts, depends on number of CPUs in the system.
Then it forks N processes, and each process loads one list.
Tests with mock.Mock in arguments are silently skipped because of unique mock id in test name.