@Test
public void addIdentityDelegatesToFieldAddition() {

    final MkAddition<Object> add = new MkAddition<>(new Object());
    final SpyField<Object> field = new SpyField<>(
        new MkField<Object>(new Object(), add)
    );
    new AddIdentity<>().value(field);
    MatcherAssert.assertThat(
        field.calls().additioned(), Matchers.is(true)
    );
    MatcherAssert.assertThat(
        add.neutraled(), Matchers.is(true)
    );
}