public void testOf_empty() {
    assertEquals(ImmutableList.of(), Lists.newArrayList(FluentIterable.of()));
  }

  // Exhaustive tests are in IteratorsTest. These are copied from IterablesTest.
  public void testConcatIterable() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);

    List<List<Integer>> input = newArrayList(list1, list2);

      assertThat(string).isEqualTo("a");
      break;
    }

    assertThat(cycle.toString()).isEqualTo("[a, b] (cycled)");
  }

  // Again, the exhaustive tests are in IteratorsTest
  public void testConcatIterable() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);

    List<List<Integer>> input = newArrayList(list1, list2);

    Iterable<Integer> result = Iterables.concat(input);