Collection<Double> iterable = Collections.emptySet();
    assertThat(ImmutableDoubleArray.copyOf(iterable)).isSameInstanceAs(ImmutableDoubleArray.of());
  }

  public void testCopyOf_collection_nonempty() {
    List<Double> list = Arrays.asList(0.0, 1.0, 3.0);
    ImmutableDoubleArray iia = ImmutableDoubleArray.copyOf(list);
    list.set(2, 2.0);

    Collection<Integer> iterable = Collections.emptySet();
    assertThat(ImmutableIntArray.copyOf(iterable)).isSameInstanceAs(ImmutableIntArray.of());
  }

  public void testCopyOf_collection_nonempty() {
    List<Integer> list = Arrays.asList(0, 1, 3);
    ImmutableIntArray iia = ImmutableIntArray.copyOf(list);
    list.set(2, 2);
    assertThat(iia.asList()).containsExactly(0, 1, 3).inOrder();
  }

    Collection<Double> iterable = Collections.emptySet();
    assertThat(ImmutableDoubleArray.copyOf(iterable)).isSameInstanceAs(ImmutableDoubleArray.of());
  }

  public void testCopyOf_collection_nonempty() {
    List<Double> list = Arrays.asList(0.0, 1.0, 3.0);
    ImmutableDoubleArray iia = ImmutableDoubleArray.copyOf(list);
    list.set(2, 2.0);