Run Fixture actions (setup, run, check).

        Core test loop for Fixture.  Executes setup, run, and check in order.

def _execute(self) -> None:
        '''Run Fixture actions (setup, run, check).

        Core test loop for Fixture.  Executes setup, run, and check in order.

        '''

        if hasattr(self, '_last_resolver_exception'):
            logger.warning('last exception from %s.%s:', self.__class__.__name__, self._last_resolver_exception[0], exc_info = self._last_resolver_exception[1])

        self.setup()
        self.run()
        self.check()