'no-member' pylint error in unittests since testtools 1.6.0

[Thomas Chiroux]

ex with this simple test code:

    import testtools

    class TestTemplate(testtools.TestCase):

        """Describe here what the test should do.

        and here give eventually more details.
        """

        def test_always_true(self):
            """Remove this test when using the template."""
            self.assertTrue(True)

running pylint on a project containing this tests gives:
" Instance of 'TestTemplate' has no 'assertTrue' member (no-member)"

Falling back to testools 1.5.0 gives no pylint error.
I've the same pylint errors in 1.7.1.

This is a simple sample, but in a fully tested project, it gives no-member errors on assertTrue, assertAlmostEqual, assertFalse, assertNotEqual, assertGreaterEqual

(but not for example for assertEqual)

running the unittests is OK (no error in the tests), it gives only pylint errors (which may be a false positive, but I can figure why and how it changed in 1.6.0)

environment:
* linux (archlinux) 3.18.6-1
* python 3.4.3
* pylint 1.4.1 / astroid 1.3.4
* unittest2 1.0.0
* traceback2 1.4.0
* linecache2 1.0.0

[Robert Collins (lifeless)]

Wow, thats fun. Uhm, I have no idea. Perhaps file as a pylint bug?

[Jonathan Lange (jml)]

In 1.6.0 we moved to inherit from unittest2. The problem is that pylint is not picking up methods inherited from grandparents. Not really a testtools bug, alas.