def test_coverdirDefault(self):
        """
        L{trial.Options.coverdir} returns a L{FilePath} based on the default
        for the I{temp-directory} option if that option is not specified.
        """
        options = trial.Options()
        self.assertEqual(
            options.coverdir(),
            FilePath(".").descendant([options["temp-directory"], "coverage"]))

        L{trial.Options.coverdir} returns a L{FilePath} based on the default
        for the I{temp-directory} option if that option is not specified.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_script.py