StringCharacterIterator fixture = new StringCharacterIterator("fixture");
assertEquals('e', fixture.last());
fixture.next();
assertEquals('e', fixture.last());
fixture = new StringCharacterIterator("fixture", 1);
assertEquals('e', fixture.last());
fixture = new StringCharacterIterator("fixture", 1, "fixture".length(),
2);
assertEquals('e', fixture.last());
fixture = new StringCharacterIterator("fixture", 1, 4, 2);
assertEquals('t', fixture.last());