@Test
void formal() throws TemplateValueFormatException {

    final TemplateNumberFormat f = InterestNumberFormatFactory.INSTANCE.get("", Locale.ENGLISH,
            Environment.getCurrentEnvironment());
    assertSoftly(softly -> {
        softly.assertThat(f.isLocaleBound())
            .isTrue();
        softly.assertThat(f.getDescription())
            .isNotNull()
            .isNotEmpty();
        softly.assertThatThrownBy(() -> InterestNumberFormatFactory.INSTANCE.get("someparam", Locale.ENGLISH,
                Environment
                    .getCurrentEnvironment()))
            .isInstanceOf(InvalidFormatParametersException.class);
    });
}