Objects { static int hash(final Object... values) { return Arrays.hashCode(values); }    }
@Test public void hash_nullValueAsParam_returnNumber() { final Object nullObject = null; final int hash = Objects.hash(nullObject); assertThat(hash, is(notNullValue())); }
@Test public void hash_ObjectValueAsParam_returnNumber() { final Object objectA = new Object(); final int hash = Objects.hash(objectA); assertThat(hash, is(notNullValue())); }