@Test
 public void test_different_sizes() {
   final List<Character> ARRAY = Arrays.asList(' ', '3');
   final FixSizeBuffer<Character> buffer = new FixSizeBuffer<>(2);
   buffer.add(' ');
   assertFalse(buffer.match(ARRAY));
 }
 @Test
 public void test_with_nulls() {
   final List<Character> ARRAY = Arrays.asList(' ', null);
   final FixSizeBuffer<Character> buffer = new FixSizeBuffer<>(2);
   buffer.add(' ');
   buffer.add(null);
   assertTrue(buffer.match(ARRAY));
 }
 @Test
 public void test_nulls() {
   final FixSizeBuffer<Character> buffer = new FixSizeBuffer<>(2);
   buffer.add(' ');
   assertFalse(buffer.match(null));
 }