def test_buildAllTarballsEnsuresExistingCheckout(self):
        checkout = FilePath(self.mktemp())
        self.assertRaises(NotWorkingDirectory,
                          buildAllTarballs,
                          checkout, FilePath(self.mktemp()))
        checkout.createDirectory()
        self.assertRaises(NotWorkingDirectory,
                          buildAllTarballs,
                          checkout, FilePath(self.mktemp()))
L{NotWorkingDirectory} is raised by L{buildAllTarballs} when the
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/python/test/test_release.py/BuildAllTarballsTest.test_buildAllTarballsEnsuresExistingCheckout