public void test_constructor() {
        try {
            new ScaledDurationField(null, DurationFieldType.minutes(), 10);
            fail();
        } catch (IllegalArgumentException ex) {}
        try {
            new ScaledDurationField(MillisDurationField.INSTANCE, null, 10);
            fail();
        } catch (IllegalArgumentException ex) {}
        try {
            new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 0);
            fail();
        } catch (IllegalArgumentException ex) {}
        try {
            new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 1);
            fail();
        } catch (IllegalArgumentException ex) {}
    }