}

  @Test
  public void forGraph_depthFirstPostOrder_tree() throws Exception {
    Traverser<Character> traverser = Traverser.forGraph(TREE);

    assertEqualCharNodes(traverser.depthFirstPostOrder('h'), "abcdefgh");
    assertEqualCharNodes(traverser.depthFirstPostOrder('d'), "abcd");
    assertEqualCharNodes(traverser.depthFirstPostOrder('a'), "a");
  }

  @Test

    }

    public void test_markAndReset_delegatesToUnderlying() throws IOException {
        // Test that mark() and reset() delegate to underlying stream
        byte[] data = "ABCDEFGH".getBytes();
        InputStream underlyingStream = new ByteArrayInputStream(data);
        IgnoreCloseInputStream stream = new IgnoreCloseInputStream(underlyingStream);

        assertEquals('A', stream.read());

        // Create a temporary file with test data
        File tempFile = File.createTempFile("test-", ".tmp");
        try (FileOutputStream fos = new FileOutputStream(tempFile)) {
            fos.write("ABCDEFGH".getBytes());
        }

        try (TemporaryFileInputStream stream = new TemporaryFileInputStream(tempFile)) {
            // FileInputStream does not support mark/reset
            assertFalse(stream.markSupported());

    //     the smaller of these blocks with the far end of the other one. That leaves us with a
    //     smaller version of the same problem.
    //     Say we are rotating abcdefgh by 5. We start with abcde|fgh. The smaller block is [fgh]:
    //     [abc]de|[fgh] -> [fgh]de|[abc]. Now [fgh] is in the right place, but we need to swap [de]