def METHOD_NAME(self) -> None:
    with open("test.conf", "w") as testconfig_handle:
        testconfig_handle.write("[mirror]\nmaster=https://foo.bar.baz\n")
    instance = BandersnatchConfig()
    instance.config_file = "test.conf"
    instance.load_configuration()
    self.assertEqual(instance.config["mirror"]["master"], "https://foo.bar.baz")