dev/js/spec/matchSpec.js

// Regarding async:
// http://stackoverflow.com/questions/16423156/getting-requirejs-to-work-with-jasmine

var available = [
  'base/s=spans',
  'corenlp/c=spans',
  'corenlp/ne=tokens',
  'corenlp/p=tokens',
  'corenlp/s=spans',
  'glemm/l=tokens',
  'mate/l=tokens',
  'mate/m=tokens',
  'mate/p=tokens',
  'opennlp/p=tokens',
  'opennlp/s=spans',
  'tt/l=tokens',
  'tt/p=tokens',
  'tt/s=spans'
];

var match = {
  'corpusID' : 'WPD',
  'docID' : 'UUU',
  'textID' : '01912',
  'matchID' : 'p121-122',
  'textSigle' : 'WPD/UUU/01912',
  'available' : available
};

var snippet = "<span title=\"cnx/l:meist\">" +
    "  <span title=\"cnx/p:ADV\">" +
    "    <span title=\"cnx/syn:@PREMOD\">" +
    "      <span title=\"mate/l:meist\">" +
    "        <span title=\"mate/l:meist\">" +
    "          <span title=\"mate/p:ADV\">" +
    "            <span title=\"opennlp/p:ADV\">meist</span>" +
    "          </span>" +
    "        </span>" +
    "      </span>" +
    "    </span>" +
    "  </span>" +
    "</span>" +
    "<span title=\"cnx/l:deutlich\">" +
    "  <span title=\"cnx/p:A\">" +
    "    <span title=\"cnx/syn:@PREMOD\">" +
    "      <span title=\"mate/l:deutlich\">" +
    "        <span title=\"mate/m:degree:pos\">" +
    "          <span title=\"mate/p:ADJD\">" +
    "            <span title=\"opennlp/p:ADJD\">deutlich</span>" +
    "          </span>" +
    "        </span>" +
    "      </span>" +
    "    </span>" +
    "  </span>" +
    "</span>" +
    "<span title=\"cnx/l:fähig\">" +
    "  <span title=\"cnx/l:leistung\">" +
    "    <span title=\"cnx/p:A\">" +
    "      <span title=\"cnx/p:ADJA\">" +
    "        <span title=\"cnx/syn:@NH\">" +
    "          <span title=\"mate/l:leistungsfähig\">" +
    "            <span title=\"mate/m:degree:comp\">" +
    "              <span title=\"mate/p:ADJD\">" +
    "                <span title=\"opennlp/p:ADJD\">leistungsfähiger</span>" +
    "              </span>" +
    "            </span>" +
    "          </span>" +
    "        </span>" +
    "      </span>" +
    "    </span>" +
    "  </span>" +
    "</span>";

var treeSnippet =
  "<span class=\"context-left\"></span>" +
  "<span class=\"match\">" +
  "  <span title=\"xip/c:MC\">" +
  "    <span title=\"xip/c:TOP\">" +
  "      <span title=\"xip/c:PP\">" +
  "        <span title=\"xip/c:PREP\">Mit</span>" +
  "        <span title=\"xip/c:NP\">" +
  "          <span title=\"xip/c:DET\">dieser</span>" +
  "          <span title=\"xip/c:NPA\">" +
  "            <span title=\"xip/c:NOUN\">Methode</span>" +
  "          </span>" +
  "        </span>" +
  "      </span>" +
  "      <span title=\"xip/c:VERB\">ist</span>" +
  "      <mark>" +
  "        <span title=\"xip/c:NP\">" +
  "          <span title=\"xip/c:PRON\">es</span>" +
  "        </span>" +  
  "        <span title=\"xip/c:AP\">" +
  "          <span title=\"xip/c:ADV\">nun</span>" +
  "          <span title=\"xip/c:ADJ\">möglich</span>" +
  "        </span>" +
  "      </mark>" +
  "      <span title=\"xip/c:ADV\">z. B.</span>" +
  "      <span title=\"xip/c:NPA\">" +
  "        <span title=\"xip/c:NP\">" +
  "          <span title=\"xip/c:NOUN\">Voice</span>" +
  "        </span>" +
  "      </span>" + "(" +
  "      <span title=\"xip/c:INS\">" +
  "        <span title=\"xip/c:NPA\">" +
  "          <span title=\"xip/c:NP\">" +
  "            <span title=\"xip/c:NOUN\">Sprache</span>" +
  "          </span>" +
  "        </span>" +
  "      </span>" + ")" +
  "      <span title=\"xip/c:VERB\">bevorzugt</span>" +
  "      <span title=\"xip/c:PP\">" +
  "        <span title=\"xip/c:PREP\">in</span>" +
  "        <span title=\"xip/c:NP\">" +
  "          <span title=\"xip/c:PRON\">der</span>" +
  "        </span>" +
  "        <span title=\"xip/c:NPA\">" +
  "          <span title=\"xip/c:NP\">" +
  "            <span title=\"xip/c:NOUN\">Bridge</span>" +
  "          </span>" +
  "        </span>" +
  "      </span>" +
  "      <span title=\"xip/c:INFC\">" +
  "        <span title=\"xip/c:INS\">" +
  "          <span title=\"xip/c:VERB\">weiterzugeben</span>" +
  "        </span>" +
  "      </span>" +
  "    </span>" +
  "  </span>" +
  "</span>" +
  "<span class=\"context-right\"></span>";


function matchElementFactory () {
  var me = document.createElement('li');

  me.setAttribute(
    'data-available-info',
    'base/s=spans corenlp/c=spans corenlp/ne=tokens corenlp/p=tokens' +
      ' corenlp/s=spans glemm/l=tokens mate/l=tokens mate/m=tokens' +
      ' mate/p=tokens opennlp/p=tokens opennlp/s=spans tt/l=tokens' +
      ' tt/p=tokens tt/s=spans');

  me.setAttribute('data-corpus-id', 'WPD');
  me.setAttribute('data-doc-id', 'FFF');
  me.setAttribute('data-text-id', '01460');
  me.setAttribute('data-text-sigle', 'WPD/FFF/01460');
  me.setAttribute('data-match-id', 'p119-120');
  me.innerHTML = '<div><div class="snippet">check</div></div><p class="ref">me</p>';
  return me;
};

function matchElementReal () {
  var me = document.createElement('em');
  me.innerHTML =
    '<li data-match-id="p85183-85184"' +
    ' data-text-sigle="GOE/AGI/00000"' +
    ' data-available-info="base/s=spans corenlp/c=spans corenlp/p=tokens corenlp/s=spans dereko/s=spans malt/d=rels opennlp/p=tokens opennlp/s=spans tt/l=tokens tt/p=tokens tt/s=spans"' +
    ' data-info="{&quot;UID&quot;:0,&quot;author&quot;:&quot;Goethe, Johann Wolfgang von&quot;,&quot;corpusID&quot;:null,&quot;corpusSigle&quot;:&quot;GOE&quot;,&quot;docID&quot;:null,&quot;docSigle&quot;:&quot;GOE\/AGI&quot;,&quot;layerInfos&quot;:&quot;base\/s=spans corenlp\/c=spans corenlp\/p=tokens corenlp\/s=spans dereko\/s=spans malt\/d=rels opennlp\/p=tokens opennlp\/s=spans tt\/l=tokens tt\/p=tokens tt\/s=spans&quot;,&quot;matchID&quot;:&quot;match-GOE\/AGI\/00000-p85183-85184&quot;,&quot;pubDate&quot;:&quot;1982&quot;,&quot;pubPlace&quot;:&quot;München&quot;,&quot;subTitle&quot;:&quot;Auch ich in Arkadien!&quot;,&quot;textID&quot;:null,&quot;textSigle&quot;:&quot;GOE\/AGI\/00000&quot;,&quot;title&quot;:&quot;Italienische Reise&quot;}"' +
    ' id="GOE/AGI/00000#p85183-85184">' +
    '<div>' + 
    '<div class="flag"></div>' +
    '<div class="snippet startMore endMore"><span class="context-left"><span class="more"></span>keine großen Flächen, aber sanft gegeneinander laufende Berg- und Hügelrücken, durchgängig mit Weizen und Gerste bestellt, die eine ununterbrochene Masse von Fruchtbarkeit dem Auge darbieten. der diesen Pflanzen geeignete Boden wird so genutzt und so geschont, daß man nirgends einen </span><span class="match"><mark>Baum</mark></span><span class="context-right"> sieht, ja, alle die kleinen Ortschaften und Wohnungen liegen auf Rücken der Hügel, wo eine hinstreichende Reihe Kalkfelsen den Boden ohnehin unbrauchbar macht. dort wohnen die Weiber das ganze Jahr, mit Spinnen und Weben beschäftigt, die Männer hingegen bringen zur<span class="more"></span></span></div>' +
    '</div>' +
    '<p class="ref"><strong>Italienische Reise</strong> von Goethe, Johann Wolfgang von (<time datetime="1982">1982</time>)  <span class="sigle">[GOE/AGI/00000]</span> </p>' +
    '</li>';
  return me.firstChild;
};

define(['match'], function () {

  // Override getMatchInfo API call
  KorAP.API.getMatchInfo = function (x, param, cb) {
    if (param['spans'] === undefined || param['spans'] === false)
      cb({ "snippet": snippet });
    else
      cb({ "snippet": treeSnippet });
  };
  
  describe('KorAP.InfoLayer', function () {
    
    var infoClass = require('match/infolayer');

    it('should be initializable', function () {
      expect(
        function() { infoClass.create() }
      ).toThrow(new Error("Missing parameters"));

      expect(
        function() { infoClass.create("base") }
      ).toThrow(new Error("Missing parameters"));

      var layer = infoClass.create("base", "s");
      expect(layer).toBeTruthy();
      expect(layer.foundry).toEqual("base");
      expect(layer.layer).toEqual("s");
      expect(layer.type).toEqual("tokens");

      layer = infoClass.create("cnx", "syn", "spans");
      expect(layer).toBeTruthy();
      expect(layer.foundry).toEqual("cnx");
      expect(layer.layer).toEqual("syn");
      expect(layer.type).toEqual("spans");
    });
  });


  describe('KorAP.Match', function () {
    var match = {
      'corpusID'  : 'WPD',
      'docID'     : 'UUU',
      'textID'    : '01912',
      'matchID'   : 'p121-122',
      'textSigle' : 'WPD/UUU/01912',
      'available' : available
    };

    var matchClass = require('match');

    it('should be initializable by Object', function () {
      expect(function() {
        matchClass.create()
      }).toThrow(new Error('Missing parameters'));

      expect(matchClass.create(match)).toBeTruthy();

      var m = matchClass.create(match);
      expect(m.textSigle).toEqual("WPD/UUU/01912");
      expect(m.matchID).toEqual("p121-122");

      // /corpus/WPD/UUU.01912/p121-122/matchInfo?spans=false&foundry=*
      var m = matchClass.create(match);

      // Spans:
      var spans = m.getSpans();
      expect(spans[0].foundry).toEqual("base");
      expect(spans[0].layer).toEqual("s");

      expect(spans[1].foundry).toEqual("corenlp");
      expect(spans[1].layer).toEqual("c");

      expect(spans[2].foundry).toEqual("corenlp");
      expect(spans[2].layer).toEqual("s");

      expect(spans[spans.length-1].foundry).toEqual("tt");
      expect(spans[spans.length-1].layer).toEqual("s");

      // Tokens:
      var tokens = m.getTokens();
      expect(tokens[0].foundry).toEqual("corenlp");
      expect(tokens[0].layer).toEqual("ne");

      expect(tokens[1].foundry).toEqual("corenlp");
      expect(tokens[1].layer).toEqual("p");

      expect(tokens[tokens.length-1].foundry).toEqual("tt");
      expect(tokens[tokens.length-1].layer).toEqual("p");
    });


    it('should be initializable by Node 1', function () {
      var m = matchClass.create(matchElementFactory());
      expect(m.textSigle).toEqual("WPD/FFF/01460");
      expect(m.matchID).toEqual("p119-120");

      // Spans:
      var spans = m.getSpans();
      expect(spans[0].foundry).toEqual("base");
      expect(spans[0].layer).toEqual("s");

      expect(spans[1].foundry).toEqual("corenlp");
      expect(spans[1].layer).toEqual("c");

      expect(spans[2].foundry).toEqual("corenlp");
      expect(spans[2].layer).toEqual("s");

      expect(spans[spans.length-1].foundry).toEqual("tt");
      expect(spans[spans.length-1].layer).toEqual("s");

      // Tokens:
      var tokens = m.getTokens();
      expect(tokens[0].foundry).toEqual("corenlp");
      expect(tokens[0].layer).toEqual("ne");

      expect(tokens[1].foundry).toEqual("corenlp");
      expect(tokens[1].layer).toEqual("p");

      expect(tokens[tokens.length-1].foundry).toEqual("tt");
      expect(tokens[tokens.length-1].layer).toEqual("p");

    });

    it('should be initializable by Node 2', function () {
      var ele = matchElementReal();
      var m = matchClass.create(ele);
      expect(m.textSigle).toEqual("GOE/AGI/00000");
      expect(m.matchID).toEqual("p85183-85184");
    });

    
    it('should react to gui actions', function () {
      var e = matchElementFactory();

      expect(e.classList.contains('active')).toBe(false);
      expect(e["_match"]).toBe(undefined);

      var m = matchClass.create(e);

      expect(e.classList.contains('active')).toBe(false);
      expect(e["_match"]).not.toBe(undefined);

      // Open the match
      m.open();

      expect(e.classList.contains('active')).toBe(true);
      expect(e["_match"]).not.toBe(undefined);

      // Close the match
      m.close();
      expect(e.classList.contains('active')).toBe(false);
      expect(e["_match"]).not.toBe(undefined);

    });
  });


  describe('KorAP.MatchInfo', function () {

    var matchClass = require('match');

    var m = matchClass.create(match);
    var info = m.info();

    it('should contain a valid info', function () {
      expect(m._info).toEqual(info);
    });

    var table1, table2;

    // Async preparation
    it('should fail to load a table async', function (done) {
      expect(info).toBeTruthy();

      info.getTable([], function (tablen) {
        table1 = tablen;
        done();
      });
    });


    it('should\'nt be parsable (async)', function () {
      expect(table1).not.toBeTruthy();
    });


    it('should load a working table async', function(done) {
      expect(info).toBeTruthy();
      info.getTable(undefined, function (tablem) {
        table2 = tablem;
        done();
      });
    });
    

    it('should parse into a table (async)', function () {
      expect(table2).toBeTruthy();

      expect(table2.length()).toBe(3);

      expect(table2.getToken(0)).toBe("meist");
      expect(table2.getToken(1)).toBe("deutlich");
      expect(table2.getToken(2)).toBe("leistungsfähiger");

      expect(table2.getValue(0, "cnx", "p")[0]).toBe("ADV");
      expect(table2.getValue(0, "cnx", "syn")[0]).toBe("@PREMOD");
      expect(table2.getValue(0, "mate", "l")[0]).toBe("meist");
      expect(table2.getValue(0, "mate", "l")[1]).toBeUndefined();

      expect(table2.getValue(2, "cnx", "l")[0]).toBe("fähig");
      expect(table2.getValue(2, "cnx", "l")[1]).toBe("leistung");
    });

    
    it('should parse into a table view', function () {
      var matchElement = matchElementFactory();
      expect(matchElement.tagName).toEqual('LI');

      // Match
      expect(matchElement.children[0].tagName).toEqual('DIV');

      // snippet
      expect(matchElement.children[0].children[0].tagName).toEqual('DIV');
      expect(matchElement.children[0].children[0].classList.contains('snippet')).toBeTruthy();
      expect(matchElement.children[0].children[0].firstChild.nodeValue).toEqual('check');

      // reference
      expect(matchElement.children[1].classList.contains('ref')).toBeTruthy();
      expect(matchElement.children[1].firstChild.nodeValue).toEqual('me');

      // not yet
      expect(matchElement.children[0].children[1]).toBe(undefined);

      var info = matchClass.create(matchElement).info();
      info.toggle();

      // Match
      expect(matchElement.children[0].tagName).toEqual('DIV');

      // snippet
      expect(matchElement.children[0].children[0].tagName).toEqual('DIV');
      expect(matchElement.children[0].children[0].classList.contains('snippet')).toBeTruthy();
      expect(matchElement.children[0].children[0].firstChild.nodeValue).toEqual('check');

      // reference
      expect(matchElement.children[1].classList.contains('ref')).toBeTruthy();
      expect(matchElement.children[1].firstChild.nodeValue).toEqual('me');

      // now
      var infotable = matchElement.children[2];
      expect(infotable.tagName).toEqual('DIV');

      expect(infotable.classList.contains('matchinfo')).toBeTruthy();

      expect(infotable.children[0].classList.contains('matchtable')).toBeTruthy();
      expect(infotable.children[1].classList.contains('addtree')).toBeTruthy();
    });


    var tree;
    it('should parse into a tree (async) 1', function (done) {
      var info = matchClass.create(match).info();
      expect(info).toBeTruthy();
      info.getTree(undefined, undefined, function (treem) {
        tree = treem;
        done();
      });
    });


    it('should parse into a tree (async) 2', function () {
      expect(tree).toBeTruthy();
      expect(tree.nodes()).toEqual(49);
    });


    var matchElement, info;
    // var info, matchElement;
    it('should parse into a tree view', function () {      
      matchElement = matchElementFactory();
      expect(matchElement.tagName).toEqual('LI');

      info = matchClass.create(matchElement).info();
      info.toggle();

      // Match
      expect(matchElement.children[0].tagName).toEqual('DIV');

      // snippet
      expect(matchElement.children[0].children[0].tagName).toEqual('DIV');
      expect(matchElement.children[0].children[0].classList.contains('snippet')).toBeTruthy();
      expect(matchElement.children[0].children[0].firstChild.nodeValue).toEqual('check');

      // reference
      expect(matchElement.children[1].classList.contains('ref')).toBeTruthy();
      expect(matchElement.children[1].firstChild.nodeValue).toEqual('me');

      // now
      var infotable = matchElement.children[2];
      expect(infotable.tagName).toEqual('DIV');
      expect(infotable.classList.contains('matchinfo')).toBeTruthy();
      expect(infotable.children[0].classList.contains('matchtable')).toBeTruthy();
      expect(infotable.children[1].classList.contains('addtree')).toBeTruthy();
    });


    it('should add a tree view async 1', function (done) {
      expect(info).toBeTruthy();
      info.addTree('mate', 'beebop', function () {
        done();
      });
    });


    it('should add a tree view async 2', function () {
      // With added tree
      var infotable = matchElement.children[2];
      expect(infotable.tagName).toEqual('DIV');
      expect(infotable.classList.contains('matchinfo')).toBeTruthy();
      expect(infotable.children[0].classList.contains('matchtable')).toBeTruthy();
      expect(infotable.children[1].classList.contains('addtree')).toBe(false);

      var tree = infotable.children[1];
      expect(tree.tagName).toEqual('DIV');
      expect(tree.classList.contains('matchtree')).toBeTruthy();
      expect(tree.children[0].tagName).toEqual('H6');
      expect(tree.children[0].children[0].tagName).toEqual('SPAN');
      expect(tree.children[0].children[0].firstChild.nodeValue).toEqual('mate');
      expect(tree.children[0].children[1].tagName).toEqual('SPAN');
      expect(tree.children[0].children[1].firstChild.nodeValue).toEqual('beebop');

      expect(tree.children[1].tagName).toEqual('DIV');
    });
  });


  describe('KorAP.MatchTable', function () {

    var matchClass = require('match');

    var table;
    it('should be retrieved async', function (done) {
      var info = matchClass.create(match).info();
      expect(info).toBeTruthy();
      info.getTable(undefined, function (x) {
        table = x;
        done();
      });
    });

    it('should be rendered async', function () {
      var e = table.element();
      
      expect(e.nodeName).toBe('TABLE');
      expect(e.children[0].nodeName).toBe('THEAD');
      var tr = e.children[0].children[0];
      expect(tr.nodeName).toBe('TR');
      expect(tr.children[0].nodeName).toBe('TH');

      expect(tr.children[0].firstChild.nodeValue).toBe('Foundry');
      expect(tr.children[1].firstChild.nodeValue).toBe('Layer');
      expect(tr.children[2].firstChild.nodeValue).toBe('meist');
      expect(tr.children[3].firstChild.nodeValue).toBe('deutlich');
      expect(tr.children[4].firstChild.nodeValue).toBe('leistungsfähiger');

      // first row
      tr = e.children[1].children[0];
      expect(tr.nodeName).toBe('TR');
      expect(tr.getAttribute('tabindex')).toEqual('0');
      expect(tr.children[0].nodeName).toBe('TH');
      expect(tr.children[0].firstChild.nodeValue).toEqual('cnx');
      expect(tr.children[1].firstChild.nodeValue).toEqual('l');
      expect(tr.children[2].firstChild.nodeValue).toEqual('meist');
      expect(tr.children[3].firstChild.nodeValue).toEqual('deutlich');
      expect(tr.children[4].firstChild.firstChild.nodeValue).toEqual('fähig');
      expect(tr.children[4].lastChild.firstChild.nodeValue).toEqual('leistung');

      // second row
      tr = e.children[1].children[1];
      expect(tr.nodeName).toBe('TR');
      expect(tr.getAttribute('tabindex')).toEqual('0');
      expect(tr.children[0].nodeName).toBe('TH');
      expect(tr.children[0].firstChild.nodeValue).toEqual('cnx');
      expect(tr.children[1].firstChild.nodeValue).toEqual('p');
      expect(tr.children[2].firstChild.nodeValue).toEqual('ADV');
      expect(tr.children[3].firstChild.nodeValue).toEqual('A');
      expect(tr.children[4].firstChild.firstChild.nodeValue).toEqual('A');
      expect(tr.children[4].lastChild.firstChild.nodeValue).toEqual('ADJA');
    });
  });

  describe('KorAP.MatchTree', function () {
    var tree;
    var matchClass = require('match');

    it('should be rendered async 1', function (done) {
      var info = matchClass.create(match).info();
      expect(info).toBeTruthy();
      info.getTree(undefined, undefined, function (y) {
        tree = y;
        done();
      });
    });

    it('should be rendered async 2', function () {
      var e = tree.element();
      expect(e.nodeName).toEqual('svg');
      expect(e.getElementsByTagName('g').length).toEqual(48);
    });
  });


  describe('KorAP.MatchTreeItem', function () {
    var matchTreeItemClass = require('match/treeitem');
    it('should be initializable', function () {
      var mi = matchTreeItemClass.create(['cnx/c', 'cnx', 'c'])
      expect(mi.element().firstChild.nodeValue).toEqual('cnx/c');
      expect(mi.lcField()).toEqual(' cnx/c');
      expect(mi.foundry()).toEqual('cnx');
      expect(mi.layer()).toEqual('c');
    });
  });


  describe('KorAP.MatchRelation', function () {
    var relClass = require('match/relations')

    var relExample = "<span class=\"context-left\"></span>" +
        "<span class=\"match\">" +
        "  <span xml:id=\"token-GOE/AGA/01784-p199\">" +
        "    <span xlink:title=\"malt/d:ADV\" " +
        "          xlink:type=\"simple\" " +
        "          xlink:href=\"#token-GOE/AGA/01784-p199\">dann</span>" +
        "  </span>" +
        " zog " +
        "  <span xlink:title=\"malt/d:SUBJ\" " +
        "        xlink:type=\"simple\" " +
        "        xlink:href=\"#token-GOE/AGA/01784-p199\">ich</span>" +
        "  <span xml:id=\"token-GOE/AGA/01784-p202\">" +
        "    <span xlink:title=\"malt/d:OBJA\" " +
        "          xlink:type=\"simple\" " +
        "          xlink:href=\"#token-GOE/AGA/01784-p199\">mich</span>" +
        "  </span>" +
        "</span>" +
        "<span class=\"context-right\"></span>";


    it('should be initializable', function () {
      var tree = relClass.create();
      expect(tree.size()).toBe(0);
    });

    it('should be parse string data', function () {
      var tree = relClass.create(relExample);
      expect(tree.size()).toBe(4);
    });


  });

  
  describe('KorAP.MatchTreeMenu', function () {
    var matchTreeMenu = require('match/treemenu');
    var matchTreeItem = require('match/treeitem');

    it('should be initializable', function () {
      var menu = matchTreeMenu.create(undefined, [
        ['cnx/c', 'cnx', 'c'],
        ['xip/c', 'xip', 'c']
      ]);

      expect(menu.itemClass()).toEqual(matchTreeItem);
      expect(menu.element().nodeName).toEqual('UL');
      expect(menu.element().classList.contains('visible')).toBeFalsy();
      expect(menu.limit()).toEqual(6);
      menu.show();
      expect(menu.element().classList.contains('visible')).toBeTruthy();
      expect(menu.item(0).active()).toBe(false);
    });
  });

  // table = view.toTable();
  // table.sortBy('');
  // table.element();
  // tree = view.toTree();
  // tree.element();
});