String[] array = new String[0];
    Set<String> set = copyOf(array);
    assertEquals(Collections.<String>emptySet(), set);
    assertSame(this.<String>of(), set);
  }

  public void testCopyOf_arrayOfOneElement() {
    String[] array = new String[] {"a"};
    Set<String> set = copyOf(array);
    assertEquals(singleton("a"), set);
  }

  public void testCopyOf_nullArray() {

  }

  public void testCopyOf_emptyArray() {
    String[] array = new String[0];
    List<String> list = ImmutableList.copyOf(array);
    assertEquals(emptyList(), list);
  }

  public void testCopyOf_arrayOfOneElement() {
    String[] array = new String[] {"a"};
    List<String> list = ImmutableList.copyOf(array);
    assertEquals(singletonList("a"), list);
  }

  public void testCopyOf_nullArray() {

  }

  public void testCopyOf_emptyArray() {
    String[] array = new String[0];
    List<String> list = ImmutableList.copyOf(array);
    assertEquals(emptyList(), list);
  }

  public void testCopyOf_arrayOfOneElement() {
    String[] array = new String[] {"a"};
    List<String> list = ImmutableList.copyOf(array);
    assertEquals(singletonList("a"), list);
  }

  public void testCopyOf_nullArray() {