@Test public void shouldToString() { final int count = 7; for (int i = 0; i < count; i++) { final String value = String.valueOf(i); map.put(i, i + 97, value); } assertThat(map.toString(), is("{1_98=1, 3_100=3, 2_99=2, 5_102=5, 6_103=6, 4_101=4, 0_97=0}")); }