Traverser<Character> traverser = Traverser.forTree(CYCLIC_GRAPH_CONTAINING_TREE);

    assertEqualCharNodes(traverser.depthFirstPostOrder('a'), "cdba");
    assertEqualCharNodes(traverser.depthFirstPostOrder('b'), "cdb");
    assertEqualCharNodes(traverser.depthFirstPostOrder('d'), "d");
  }

  @Test
  public void forTree_depthFirstPostOrderIterable_cyclicGraphContainingTree() throws Exception {

    Traverser<Character> traverser = Traverser.forTree(CYCLIC_GRAPH_CONTAINING_TREE);

    assertEqualCharNodes(traverser.depthFirstPostOrder('a'), "cdba");
    assertEqualCharNodes(traverser.depthFirstPostOrder('b'), "cdb");
    assertEqualCharNodes(traverser.depthFirstPostOrder('d'), "d");
  }

  @Test
  public void forTree_depthFirstPostOrderIterable_cyclicGraphContainingTree() throws Exception {

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business

// buy : 2014-12-18 Amazon Registry Services, Inc.
buy

// buzz : 2013-10-02 DOTSTRATEGY CO.
buzz

// bzh : 2014-02-27 Association www.bzh
bzh

// cab : 2013-10-24 Binky Moon, LLC
cab

// cafe : 2015-02-11 Binky Moon, LLC
cafe

// cal : 2014-07-24 Charleston Road Registry Inc.
cal

// call : 2014-12-18 Amazon Registry Services, Inc.
call

1DA9          ; mapped                 ; 026D          # 4.1  MODIFIER LETTER SMALL L WITH RETROFLEX HOOK
1DAA          ; mapped                 ; 1D85          # 4.1  MODIFIER LETTER SMALL L WITH PALATAL HOOK
1DAB          ; mapped                 ; 029F          # 4.1  MODIFIER LETTER SMALL CAPITAL L
1DAC          ; mapped                 ; 0271          # 4.1  MODIFIER LETTER SMALL M WITH HOOK