@Test
public void testFirst() throws Exception {
List<String> mList = new ArrayList<>();
mList.add("x");
mList.add("y");
mList.add("z");
mList.add("w");
ImmutableList<String> l = new ArrayBackedImmutableList<String>(mList);
Assert.assertEquals("x", l.first());
Assert.assertEquals("y", l.tail(1).first());
Assert.assertEquals("z", l.subList(2, 1).first());
}
@Test
public void testSublist() throws Exception {
List<String> mList = new ArrayList<>();
mList.add("x");
mList.add("y");
mList.add("z");
mList.add("w");
ImmutableList<String> l = new ArrayBackedImmutableList<String>(mList);
Assert.assertEquals("[]", l.subList(0, 0).toString());
Assert.assertEquals("[x]", l.subList(0, 1).toString());
Assert.assertEquals("[x, y]", l.subList(0, 2).toString());
Assert.assertEquals("[x, y, z]", l.subList(0, 3).toString());
Assert.assertEquals("[x, y, z, w]", l.subList(0, 4).toString());
Assert.assertEquals("[y, z, w]", l.subList(1, 3).toString());
Assert.assertEquals("[y, z]", l.subList(1, 2).toString());
Assert.assertEquals("[y, z]", l.subList(1, 2).toString());
Assert.assertEquals("[y]", l.subList(1, 1).toString());
Assert.assertEquals("[z]", l.subList(2, 1).toString());
}