@Test
void testSimple() {

    MyObject original = new MyObject();
    original.setString("Original");
    MyObject copy = new MyObject();
    copy.setString("Copy");
    FieldMapper.copy(original, copy);
    assertThat(copy.getString())
            .isEqualTo(original.getString());
    assertThat(System.identityHashCode(original))
            .isNotEqualTo(System.identityHashCode(copy));
}