IntegerConverter implements PropertyConverter<Integer> { @Override public int hashCode(){ return getClass().hashCode(); }  @Override Integer convert(String value, ConversionContext ctx); @Override boolean equals(Object o); @Override int hashCode();  }
@Test public void testHashCode() { IntegerConverter instance = new IntegerConverter(); assertThat(instance.hashCode()).isEqualTo(IntegerConverter.class.hashCode()); }