def test_package_data(self):
        sources = self.mkdtemp()
        f = open(os.path.join(sources, "__init__.py"), "w")
        f.write("# Pretend this is a package.")
        f.close()
        f = open(os.path.join(sources, "README.txt"), "w")
        f.write("Info about this package")
        f.close()