Reset singleton field during JUnit tests, roboelectric junit tests

SettingsTest.java

    @After
    public void teaddown() {
        setting.clear();
        resetSingleton(ErgoSettings.class, "sInstance");
    }


    public static void resetSingleton(Class clazz, String fieldName) {
        Field instance;
        try {
            instance = clazz.getDeclaredField(fieldName);
            instance.setAccessible(true);
            instance.set(null, null);
        } catch (Exception e) {
            throw new RuntimeException();
        }
    }