String toTest =
        MoreObjects.toStringHelper("TSH")
            .add("strings", strings)
            .add("ints", ints)
            .add("objects", objects)
            .add("arrayWithNull", arrayWithNull)
            .add("empty", empty)
            .toString();
    assertThat(toTest)
        .isEqualTo(
            "TSH{strings=[hello, world], ints=[2, 42], objects=[obj], arrayWithNull=[null],"