@Test public void shouldConvertToJavaMap() { final Value<Integer> value = of(1, 2, 3); final java.util.Map<Integer, Integer> map = value.toJavaMap(v -> Tuple.of(v, v)); if (value.isSingleValued()) { assertThat(map).isEqualTo(JavaCollections.javaMap(1, 1)); } else { assertThat(map).isEqualTo(JavaCollections.javaMap(1, 1, 2, 2, 3, 3)); } }