+ "field2\\=\\[abc, def, ghi\\], "
            + "field3=\\{abc\\=1, def\\=2, ghi\\=3\\}\\}";

    assertTrue(toTest, toTest.matches(expectedRegex));
  }

  public void testToString_addWithNullName() {
    MoreObjects.ToStringHelper helper = MoreObjects.toStringHelper(new TestClass());
    assertThrows(NullPointerException.class, () -> helper.add(null, "Hello"));
  }