@Test
public void testHashCode() {
assertThat(category.hashCode()).isEqualTo(new ForeNameCategory().hashCode());
assertThat(category.hashCode()).isEqualTo(category.hashCode());
assertThat(category.hashCode()).isEqualTo(new LocationCategory().hashCode());
category.setFilter(new StringEquals());
final ForeNameCategory other = new ForeNameCategory();
other.setFilter(new StringEquals());
assertThat(category.hashCode()).isEqualTo(other.hashCode());
final LocationCategory different = new LocationCategory();
different.setFilter(new StringEquals());
assertThat(category.hashCode()).isEqualTo(different.hashCode());
}
