@Test
public void testConcat() {
final List<List<Integer>> l =
list(list(1), list(2, 3), Collections.<Integer>nil(), list(9, 2, 1));
final List<Integer> c = concat(l);
assertArrayEquals(array(1, 2, 3, 9, 2, 1), toArray(Integer.class, c));
}
@Test
public void testToArray() {
final String[] a = toArray(String.class, Collections.<String>list());
assertEquals(0, a.length);
}
@Test
public void testCons() {
// compile check
List<Object> x = Collections.<Object>cons("1", list(1, 3));
}
@Test
public void mkString() {
List<Integer> l = list(1, 2, 3);
assertEquals("1-2-3", Collections.mkString(l, "-"));
}