public/js/spec/vcSpec.js

/*
Todo: In demoSpec: Create "and" on the last element of the top "or"-Group

*/


// Helper method for building factories
buildFactory = function (objClass, defaults) {
  return {
    create : function (overwrites) {
      var newObj = {};
      for (var prop in defaults) {
	newObj[prop] = defaults[prop];
      };
      for (var prop in overwrites) {
	newObj[prop] = overwrites[prop];
      };
      if (objClass === KorAP.VirtualCollection)
	return objClass.render(newObj);
      else
	return objClass.create().fromJson(newObj);
    }
  }
};

function _andOn (obj) {
  KorAP._and.bind(obj.element().lastChild.firstChild).apply();
};

function _orOn (obj) {
  KorAP._or.bind(obj.element().lastChild.firstChild).apply();
};

function _delOn (obj) {
  KorAP._delete.bind(obj.element().lastChild.firstChild).apply();
};

var demoFactory = buildFactory(KorAP.VirtualCollection, {
  "@type":"korap:docGroup",
  "operation":"operation:or",
  "operands":[
    {
      "@type":"korap:docGroup",
      "operation":"operation:and",
      "operands":[
        {
          "@type":"korap:doc",
          "key":"Titel",
          "value":"Baum",
          "match":"match:eq"
        },
        {
          "@type":"korap:doc",
          "key":"Veröffentlichungsort",
          "value":"hihi",
          "match":"match:eq"
        },
        {
          "@type":"korap:docGroup",
          "operation":"operation:or",
          "operands":[
            {
              "@type":"korap:doc",
              "key":"Titel",
              "value":"Baum",
              "match":"match:eq"
            },
            {
              "@type":"korap:doc",
              "key":"Veröffentlichungsort",
              "value":"hihi",
              "match":"match:eq"
            }
          ]
        }
      ]
    },
    {
      "@type":"korap:doc",
      "key":"Untertitel",
      "value":"huhu",
      "match":"match:eq"
    }
  ]
});


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

  // Create example factories
  var stringFactory = buildFactory(KorAP.Doc, {
    "key"   : "author",
    "value" : "Max Birkendale",
    "@type" : "korap:doc"
  });

  // Create example factories
  var dateFactory = buildFactory(KorAP.Doc, {
    "key"   : "pubDate",
    "type"  : "type:date",
    "match" : "match:eq",
    "value" : "2014-11-05",
    "@type" : "korap:doc"
  });

  // Create example factories
  var regexFactory = buildFactory(KorAP.Doc, {
    "key"   : "title",
    "type"  : "type:regex",
    "value" : "[^b]ee.+?",
    "@type" : "korap:doc"
  });

  it('should be initializable', function () {
    var doc = KorAP.Doc.create();
    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toBeUndefined();
    expect(doc.value()).toBeUndefined();
    expect(doc.type()).toEqual("string");
  });

  it('should be definable', function () {

    // Empty doc
    var doc = KorAP.Doc.create();

    // Set values
    doc.key("title");
    doc.value("Der alte Mann");
    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toEqual("title");
    expect(doc.type()).toEqual("string");
    expect(doc.value()).toEqual("Der alte Mann");
  });


  it('should deserialize JSON-LD string', function () {
    var doc;

    // String default
    doc = stringFactory.create();
    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toEqual("author");
    expect(doc.type()).toEqual("string");
    expect(doc.value()).toEqual("Max Birkendale");

    // No valid string
    doc = stringFactory.create({
      value : undefined
    });
    expect(doc).toBeUndefined();

    // No valid string
    doc = stringFactory.create({
      value : { "foo" : "bar" }
    });
    expect(doc).toBeUndefined();

    // Change match type
    doc = stringFactory.create({
      "match" : "match:ne"
    });

    expect(doc.matchop()).toEqual('ne');
    expect(doc.key()).toEqual("author");
    expect(doc.type()).toEqual("string");
    expect(doc.value()).toEqual("Max Birkendale");


    // Invalid match type
    doc = stringFactory.create({
      "match" : { "foo" : "bar" }
    });
    expect(doc).toBeUndefined();
  });

  it('should deserialize JSON-LD regex', function () {
    var doc = regexFactory.create();
    expect(doc.key()).toEqual("title");
    expect(doc.type()).toEqual("regex");
    expect(doc.value()).toEqual("[^b]ee.+?");
    expect(doc.matchop()).toEqual('eq');

    // change matcher
    doc = regexFactory.create({
      match : "match:ne"
    });
    expect(doc.matchop()).toEqual('ne');

    // Invalid matcher
    doc = regexFactory.create({
      match : "match:chook"
    });
    expect(doc).toBeUndefined();

    // Invalid regex
    doc = regexFactory.create({
      value : "[^b"
    });
    expect(doc).toBeUndefined();
  });

  it('should deserialize JSON-LD date', function () {

    // Normal date
    doc = dateFactory.create({});

    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toEqual("pubDate");
    expect(doc.type()).toEqual("date");
    expect(doc.value()).toEqual("2014-11-05");

    // Short date 1
    doc = dateFactory.create({
      "value" : "2014-11"
    });

    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toEqual("pubDate");
    expect(doc.type()).toEqual("date");
    expect(doc.value()).toEqual("2014-11");

    // Short date 2
    doc = dateFactory.create({
      "value" : "2014"
    });

    expect(doc.matchop()).toEqual('eq');
    expect(doc.key()).toEqual("pubDate");
    expect(doc.type()).toEqual("date");
    expect(doc.value()).toEqual("2014");

    // Invalid date!
    doc = dateFactory.create({
      "value" : "2014-11-050"
    });
    expect(doc).toBeUndefined();

    // Invalid matcher!
    doc = dateFactory.create({
      "match" : "match:ne",
    });
    expect(doc).toBeUndefined();
  });

  it('should be serializale to JSON', function () {

    // Empty doc
    var doc = KorAP.Doc.create();
    expect(doc.toJson()).toEqual(jasmine.any(Object));

    // Serialize string
    doc = stringFactory.create();
    expect(doc.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "type" : "type:string",
      "key" : "author",
      "value" : "Max Birkendale",
      "match" : "match:eq"
    }));

    // Serialize regex
    doc = regexFactory.create();
    expect(doc.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "type" : "type:regex",
      "value" : "[^b]ee.+?",
      "match" : "match:eq",
      "key" : 'title'
    }));

    doc = regexFactory.create({
      match: "match:ne"
    });
    expect(doc.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "type" : "type:regex",
      "value" : "[^b]ee.+?",
      "match" : "match:ne",
      "key" : 'title'
    }));

    doc = dateFactory.create();
    expect(doc.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "type" : "type:date",
      "value" : "2014-11-05",
      "match" : "match:eq",
      "key" : 'pubDate'
    }));

    doc = dateFactory.create({
      value : "2014"
    });
    expect(doc.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "type" : "type:date",
      "value" : "2014",
      "match" : "match:eq",
      "key" : 'pubDate'
    }));
  });

  it('should be serializale to String', function () {

    // Empty doc
    var doc = KorAP.Doc.create();
    expect(doc.toQuery()).toEqual("");

    // Serialize string
    doc = stringFactory.create();
    expect(doc.toQuery()).toEqual('author = "Max Birkendale"');

    // Serialize string with quotes
    doc = stringFactory.create({ "value" : 'Max "Der Coole" Birkendate'});
    expect(doc.toQuery()).toEqual('author = "Max \\"Der Coole\\" Birkendate"');

    // Serialize regex
    doc = regexFactory.create();
    expect(doc.toQuery()).toEqual('title = /[^b]ee.+?/');

    doc = regexFactory.create({
      match: "match:ne"
    });
    expect(doc.toQuery()).toEqual('title != /[^b]ee.+?/');

    doc = dateFactory.create();
    expect(doc.toQuery()).toEqual('pubDate in 2014-11-05');

    doc = dateFactory.create({
      value : "2014"
    });
    expect(doc.toQuery()).toEqual('pubDate in 2014');
  });
});


describe('KorAP.DocGroup', function () {
  // Create example factories
  var docFactory = buildFactory(
    KorAP.Doc,
    {
      "@type" : "korap:doc",
      "match":"match:eq",
      "key" : "author",
      "value" : "Max Birkendale"
    }
  );

  var docGroupFactory = buildFactory(
    KorAP.DocGroup, {
      "@type" : "korap:docGroup",
      "operation" : "operation:and",
      "operands" : [
	docFactory.create().toJson(),
	docFactory.create({
	  "key" : "pubDate",
	  "type" : "type:date",
	  "value" : "2014-12-05"
	}).toJson()
      ]
    });


  it('should be initializable', function () {
    // Create empty group
    var docGroup = KorAP.DocGroup.create();
    expect(docGroup.operation()).toEqual('and');

    // Create empty group
    docGroup = KorAP.DocGroup.create();
    docGroup.operation('or');
    expect(docGroup.operation()).toEqual('or');
  });

  it('should be definable', function () {

    // Empty group
    var docGroup = KorAP.DocGroup.create();
    expect(docGroup.operation()).toEqual('and');

    // Set values
    docGroup.operation("or");
    expect(docGroup.operation()).toEqual('or');

    // Set invalid values
    docGroup.operation("hui");
    expect(docGroup.operation()).toEqual('or');
  });

  it('should be deserializable', function () {
    var docGroup = docGroupFactory.create();
    expect(docGroup.operation()).toEqual("and");
    expect(docGroup.operands().length).toEqual(2);

    var op1 = docGroup.getOperand(0);
    expect(op1.type()).toEqual("string");
    expect(op1.key()).toEqual("author");
    expect(op1.value()).toEqual("Max Birkendale");
    expect(op1.matchop()).toEqual("eq");

    var op2 = docGroup.getOperand(1);
    expect(op2.type()).toEqual("date");
    expect(op2.key()).toEqual("pubDate");
    expect(op2.value()).toEqual("2014-12-05");
    expect(op2.matchop()).toEqual("eq");

    // Append empty group
    var newGroup = docGroup.append(KorAP.DocGroup.create());
    newGroup.operation('or');
    newGroup.append(docFactory.create());
    newGroup.append(docFactory.create({
      "type" : "type:regex",
      "key" : "title",
      "value" : "^e.+?$",
      "match" : "match:ne"
    }));

    expect(docGroup.operation()).toEqual("and");
    expect(docGroup.operands().length).toEqual(3);

    var op1 = docGroup.getOperand(0);
    expect(op1.ldType()).toEqual("doc");
    expect(op1.type()).toEqual("string");
    expect(op1.key()).toEqual("author");
    expect(op1.value()).toEqual("Max Birkendale");
    expect(op1.matchop()).toEqual("eq");

    var op2 = docGroup.getOperand(1);
    expect(op2.ldType()).toEqual("doc");
    expect(op2.type()).toEqual("date");
    expect(op2.key()).toEqual("pubDate");
    expect(op2.value()).toEqual("2014-12-05");
    expect(op2.matchop()).toEqual("eq");

    var op3 = docGroup.getOperand(2);
    expect(op3.ldType()).toEqual("docGroup");
    expect(op3.operation()).toEqual("or");

    var op4 = op3.getOperand(0);
    expect(op4.ldType()).toEqual("doc");
    expect(op4.type()).toEqual("string");
    expect(op4.key()).toEqual("author");
    expect(op4.value()).toEqual("Max Birkendale");
    expect(op4.matchop()).toEqual("eq");

    var op5 = op3.getOperand(1);
    expect(op5.ldType()).toEqual("doc");
    expect(op5.type()).toEqual("regex");
    expect(op5.key()).toEqual("title");
    expect(op5.value()).toEqual("^e.+?$");
    expect(op5.matchop()).toEqual("ne");
  });

  it('should be serializable to JSON', function () {
    var docGroup = docGroupFactory.create();

    expect(docGroup.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:docGroup",
      "operation" : "operation:and",
      "operands" : [
	{
	  "@type": 'korap:doc',
	  "key" : 'author',
	  "match": 'match:eq',
	  "value": 'Max Birkendale',
	  "type": 'type:string'
	},
	{
	  "@type": 'korap:doc',
	  "key": 'pubDate',
	  "match": 'match:eq',
	  "value": '2014-12-05',
	  "type": 'type:date'
	}
      ]
    }));
  });

  it('should be serializable to String', function () {
    var docGroup = docGroupFactory.create();
    expect(docGroup.toQuery()).toEqual('author = "Max Birkendale" & pubDate in 2014-12-05');

    docGroup = docGroupFactory.create({
      "@type" : "korap:docGroup",
      "operation" : "operation:or",
      "operands" : [
	{
	  "@type": 'korap:doc',
	  "key" : 'author',
	  "match": 'match:eq',
	  "value": 'Max Birkendale',
	  "type": 'type:string'
	},
	{
	  "@type" : "korap:docGroup",
	  "operation" : "operation:and",
	  "operands" : [
	    {
	      "@type": 'korap:doc',
	      "key": 'pubDate',
	      "match": 'match:geq',
	      "value": '2014-05-12',
	      "type": 'type:date'
	    },
	    {
	      "@type": 'korap:doc',
	      "key": 'pubDate',
	      "match": 'match:leq',
	      "value": '2014-12-05',
	      "type": 'type:date'
	    },
	    {
	      "@type": 'korap:doc',
	      "key": 'foo',
	      "match": 'match:ne',
	      "value": '[a]?bar',
	      "type": 'type:regex'
	    }
	  ]
	}
      ]
    });
    expect(docGroup.toQuery()).toEqual(
      'author = "Max Birkendale" | (pubDate since 2014-05-12 & pubDate until 2014-12-05 & foo != /[a]?bar/)'
    );
  });
});

describe('KorAP.UnspecifiedDoc', function () {
  it('should be initializable', function () {
    var doc = KorAP.UnspecifiedDoc.create();
    var docElement = doc.element();
    expect(docElement.getAttribute('class')).toEqual('doc unspecified');
    expect(docElement.firstChild.firstChild.data).toEqual('⋯');
    expect(docElement.lastChild.lastChild.data).toEqual('⋯');
    expect(doc.toQuery()).toEqual('⋯');

    // Only removable
    expect(docElement.lastChild.children.length).toEqual(0);
  });

  it('should be removable, when no root', function () {
    var docGroup = KorAP.DocGroup.create();
    docGroup.operation('or');
    expect(docGroup.operation()).toEqual('or');

    docGroup.append({
      "@type": 'korap:doc',
      "key": 'pubDate',
      "match": 'match:eq',
      "value": '2014-12-05',
      "type": 'type:date'      
    });

    // Add unspecified object
    docGroup.append();

    expect(docGroup.element().getAttribute('class')).toEqual('docGroup');
    expect(docGroup.element().children[0].getAttribute('class')).toEqual('doc');

    var unspec = docGroup.element().children[1];
    expect(unspec.getAttribute('class')).toEqual('doc unspecified');

    // Removable
    expect(unspec.lastChild.children.length).toEqual(1);
    expect(unspec.lastChild.children[0].getAttribute('class')).toEqual('delete');
  });
});

describe('KorAP.Doc element', function () {
  it('should be initializable', function () {
    var docElement = KorAP.Doc.create(undefined, {
      "@type" : "korap:doc",
      "key":"Titel",
      "value":"Baum",
      "match":"match:eq"
    });
    expect(docElement.key()).toEqual('Titel');
    expect(docElement.matchop()).toEqual('eq');
    expect(docElement.value()).toEqual('Baum');

    var docE = docElement.element();
    expect(docE.children[0].firstChild.data).toEqual('Titel');
    expect(docE.children[1].firstChild.data).toEqual('eq');
    expect(docE.children[1].getAttribute('data-type')).toEqual('string');
    expect(docE.children[2].firstChild.data).toEqual('Baum');
    expect(docE.children[2].getAttribute('data-type')).toEqual('string');

    expect(docElement.toJson()).toEqual(jasmine.objectContaining({
      "@type" : "korap:doc",
      "key":"Titel",
      "value":"Baum",
      "match":"match:eq"
    }));
  });
});

describe('KorAP.DocGroup element', function () {
  it('should be initializable', function () {

    var docGroup = KorAP.DocGroup.create(undefined, {
      "@type" : "korap:docGroup",
      "operation" : "operation:and",
      "operands" : [
	{
	  "@type": 'korap:doc',
	  "key" : 'author',
	  "match": 'match:eq',
	  "value": 'Max Birkendale',
	  "type": 'type:string'
	},
	{
	  "@type": 'korap:doc',
	  "key": 'pubDate',
	  "match": 'match:eq',
	  "value": '2014-12-05',
	  "type": 'type:date'
	}
      ]
    });

    expect(docGroup.operation()).toEqual('and');
    var e = docGroup.element();
    expect(e.getAttribute('class')).toEqual('docGroup');
    expect(e.getAttribute('data-operation')).toEqual('and');

    var first = e.children[0];
    expect(first.getAttribute('class')).toEqual('doc');
    expect(first.children[0].getAttribute('class')).toEqual('key');
    expect(first.children[1].getAttribute('class')).toEqual('match');
    expect(first.children[2].getAttribute('class')).toEqual('value');
    expect(first.children[2].getAttribute('data-type')).toEqual('string');
    expect(first.children[0].firstChild.data).toEqual('author');
    expect(first.children[1].firstChild.data).toEqual('eq');
    expect(first.children[2].firstChild.data).toEqual('Max Birkendale');

    var second = e.children[1];
    expect(second.getAttribute('class')).toEqual('doc');
    expect(second.children[0].getAttribute('class')).toEqual('key');
    expect(second.children[1].getAttribute('class')).toEqual('match');
    expect(second.children[2].getAttribute('class')).toEqual('value');
    expect(second.children[2].getAttribute('data-type')).toEqual('date');
    expect(second.children[0].firstChild.data).toEqual('pubDate');
    expect(second.children[1].firstChild.data).toEqual('eq');
    expect(second.children[2].firstChild.data).toEqual('2014-12-05');

  });

  it('should be deserializable with nested groups', function () {
    var docGroup = KorAP.DocGroup.create(undefined, {
      "@type" : "korap:docGroup",
      "operation" : "operation:or",
      "operands" : [
	{
	  "@type": 'korap:doc',
	  "key" : 'author',
	  "match": 'match:eq',
	  "value": 'Max Birkendale',
	  "type": 'type:string'
	},
	{
	  "@type" : "korap:docGroup",
	  "operation" : "operation:and",
	  "operands" : [
	    {
	      "@type": 'korap:doc',
	      "key": 'pubDate',
	      "match": 'match:geq',
	      "value": '2014-05-12',
	      "type": 'type:date'
	    },
	    {
	      "@type": 'korap:doc',
	      "key": 'pubDate',
	      "match": 'match:leq',
	      "value": '2014-12-05',
	      "type": 'type:date'
	    }
	  ]
	}
      ]
    });

    expect(docGroup.operation()).toEqual('or');
    var e = docGroup.element();
    expect(e.getAttribute('class')).toEqual('docGroup');
    expect(e.getAttribute('data-operation')).toEqual('or');

    expect(e.children[0].getAttribute('class')).toEqual('doc');
    var docop = e.children[0].lastChild;
    expect(docop.getAttribute('class')).toEqual('operators');
    expect(docop.children[0].getAttribute('class')).toEqual('and');
    expect(docop.children[1].getAttribute('class')).toEqual('or');
    expect(docop.children[2].getAttribute('class')).toEqual('delete');

    expect(e.children[1].getAttribute('class')).toEqual('docGroup');
    expect(e.children[1].getAttribute('data-operation')).toEqual('and');

    // This and-operation can be "or"ed or "delete"d
    var secop = e.children[1].children[2];
    expect(secop.getAttribute('class')).toEqual('operators');
    expect(secop.children[0].getAttribute('class')).toEqual('or');
    expect(secop.children[1].getAttribute('class')).toEqual('delete');

    // This or-operation can be "and"ed or "delete"d
    expect(e.children[2].getAttribute('class')).toEqual('operators');
    expect(e.lastChild.getAttribute('class')).toEqual('operators');
    expect(e.lastChild.children[0].getAttribute('class')).toEqual('and');
    expect(e.lastChild.children[1].getAttribute('class')).toEqual('delete');

  });
});

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

  var simpleGroupFactory = buildFactory(KorAP.DocGroup, {
    "@type" : "korap:docGroup",
    "operation" : "operation:and",
    "operands" : [
      {
	"@type": 'korap:doc',
	"key" : 'author',
	"match": 'match:eq',
	"value": 'Max Birkendale',
	"type": 'type:string'
      },
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:eq',
	"value": '2014-12-05',
	"type": 'type:date'
      }
    ]
  });

  var nestedGroupFactory = buildFactory(KorAP.VirtualCollection, {
    "@type" : "korap:docGroup",
    "operation" : "operation:or",
    "operands" : [
      {
	"@type": 'korap:doc',
	"key" : 'author',
	"match": 'match:eq',
	"value": 'Max Birkendale',
	"type": 'type:string'
      },
      {
	"@type" : "korap:docGroup",
	"operation" : "operation:and",
	"operands" : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:geq',
	    "value": '2014-05-12',
	    "type": 'type:date'
	  },
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:leq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  }
	]
      }
    ]
  });

  var flatGroupFactory = buildFactory(KorAP.VirtualCollection, {
    "@type" : "korap:docGroup",
    "operation" : "operation:and",
    "operands" : [
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:geq',
	"value": '2014-05-12',
	"type": 'type:date'
      },
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:leq',
	"value": '2014-12-05',
	"type": 'type:date'
      },
      {
	"@type": 'korap:doc',
	"key": 'foo',
	"match": 'match:eq',
	"value": 'bar',
	"type": 'type:string'
      }
    ]
  });
  
  it('should be initializable', function () {
    var vc = KorAP.VirtualCollection.render();
    expect(vc.element().getAttribute('class')).toEqual('vc');
    expect(vc.root().element().getAttribute('class')).toEqual('doc unspecified');

    // Not removable
    expect(vc.root().element().lastChild.children.length).toEqual(0);
  });

  it('should be based on a doc', function () {
    var vc = KorAP.VirtualCollection.render({
      "@type" : "korap:doc",
      "key":"Titel",
      "value":"Baum",
      "match":"match:eq"
    });

    expect(vc.element().getAttribute('class')).toEqual('vc');
    expect(vc.root().element().getAttribute('class')).toEqual('doc');
    expect(vc.root().key()).toEqual('Titel');
    expect(vc.root().value()).toEqual('Baum');
    expect(vc.root().matchop()).toEqual('eq');

    var docE = vc.root().element();
    expect(docE.children[0].firstChild.data).toEqual('Titel');
    expect(docE.children[1].firstChild.data).toEqual('eq');
    expect(docE.children[1].getAttribute('data-type')).toEqual('string');
    expect(docE.children[2].firstChild.data).toEqual('Baum');
    expect(docE.children[2].getAttribute('data-type')).toEqual('string');
  });

  it('should be based on a docGroup', function () {
    var vc = KorAP.VirtualCollection.render(simpleGroupFactory.create().toJson());

    expect(vc.element().getAttribute('class')).toEqual('vc');
    expect(vc.root().element().getAttribute('class')).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('and');

    var docGroup = vc.root();

    var first = docGroup.getOperand(0);
    expect(first.key()).toEqual('author');
    expect(first.value()).toEqual('Max Birkendale');
    expect(first.matchop()).toEqual('eq');

    var second = docGroup.getOperand(1);
    expect(second.key()).toEqual('pubDate');
    expect(second.value()).toEqual('2014-12-05');
    expect(second.matchop()).toEqual('eq');
  });


  it('should be based on a nested docGroup', function () {
    var vc = nestedGroupFactory.create();

    expect(vc.element().getAttribute('class')).toEqual('vc');
    expect(vc.element().firstChild.getAttribute('class')).toEqual('docGroup');
    expect(vc.element().firstChild.children[0].getAttribute('class')).toEqual('doc');
    var dg = vc.element().firstChild.children[1];
    expect(dg.getAttribute('class')).toEqual('docGroup');
    expect(dg.children[0].getAttribute('class')).toEqual('doc');
    expect(dg.children[1].getAttribute('class')).toEqual('doc');
    expect(dg.children[2].getAttribute('class')).toEqual('operators');
    expect(vc.element().firstChild.children[2].getAttribute('class')).toEqual('operators');
  });    

  it('should be modifiable by deletion in flat docGroups', function () {
    var vc = flatGroupFactory.create();
    var docGroup = vc.root();

    expect(docGroup.element().getAttribute('class')).toEqual('docGroup');

    var doc = docGroup.getOperand(1);
    expect(doc.key()).toEqual("pubDate");
    expect(doc.value()).toEqual("2014-12-05");

    // Remove operand 1
    expect(docGroup.delOperand(doc).update()).not.toBeUndefined();
    expect(doc._element).toEqual(undefined);

    doc = docGroup.getOperand(1);
    expect(doc.key()).toEqual("foo");

    // Remove operand 1
    expect(docGroup.delOperand(doc).update()).not.toBeUndefined();
    expect(doc._element).toEqual(undefined);

    // Only one operand left ...
    expect(docGroup.getOperand(1)).toBeUndefined();
    // ... but there shouldn't be a group anymore at all!
    expect(docGroup.getOperand(0)).toBeUndefined();
    
    var obj = vc.root();
    expect(obj.ldType()).toEqual("doc");
    expect(obj.key()).toEqual("pubDate");
    expect(obj.value()).toEqual("2014-05-12");

    expect(obj.element().getAttribute('class')).toEqual('doc');
  }); 


  it('should be modifiable by deletion in nested docGroups (root case)', function () {
    var vc = nestedGroupFactory.create();

    expect(vc.toQuery()).toEqual(
      'author = "Max Birkendale" | (pubDate since 2014-05-12 & pubDate until 2014-12-05)'
    );

    var docGroup = vc.root();
    expect(docGroup.ldType()).toEqual("docGroup");
    expect(docGroup.operation()).toEqual("or");

    var doc = docGroup.getOperand(0);
    expect(doc.key()).toEqual("author");
    expect(doc.value()).toEqual("Max Birkendale");

    docGroup = docGroup.getOperand(1);
    expect(docGroup.operation()).toEqual("and");

    doc = docGroup.getOperand(0);
    expect(doc.key()).toEqual("pubDate");
    expect(doc.matchop()).toEqual("geq");
    expect(doc.value()).toEqual("2014-05-12");
    expect(doc.type()).toEqual("date");

    doc = docGroup.getOperand(1);
    expect(doc.key()).toEqual("pubDate");
    expect(doc.matchop()).toEqual("leq");
    expect(doc.value()).toEqual("2014-12-05");
    expect(doc.type()).toEqual("date");

    // Remove first operand so everything becomes root
    expect(
      vc.root().delOperand(
	vc.root().getOperand(0)
      ).update().ldType()
    ).toEqual("docGroup");

    expect(vc.root().ldType()).toEqual("docGroup");
    expect(vc.root().operation()).toEqual("and");
    expect(vc.root().getOperand(0).ldType()).toEqual("doc");

    expect(vc.toQuery()).toEqual(
      'pubDate since 2014-05-12 & pubDate until 2014-12-05'
    );
  });

  it('should be modifiable by deletion in nested docGroups (resolve group case)', function () {
    var vc = nestedGroupFactory.create();

    // Get nested group
    var firstGroup = vc.root().getOperand(1);
    firstGroup.append(simpleGroupFactory.create({ "operation" : "operation:or" }));
    
    // Structur is now:
    // or(doc, and(doc, doc, or(doc, doc)))

    // Get nested or in and
    var orGroup = vc.root().getOperand(1).getOperand(2);
    expect(orGroup.ldType()).toEqual("docGroup");
    expect(orGroup.operation()).toEqual("or");

    // Remove 
    // Structur is now:
    // or(doc, and(doc, doc, doc)))
    expect(orGroup.delOperand(orGroup.getOperand(0)).update().operation()).toEqual("and");
    expect(vc.root().getOperand(1).operands().length).toEqual(3);
  });

  it('should be modifiable by deletion in nested docGroups (identical group case)', function () {
    var vc = nestedGroupFactory.create();

    // Get nested group
    var firstGroup = vc.root().getOperand(1);
    firstGroup.append(simpleGroupFactory.create({
      "operation" : "operation:or"
    }));
    var oldAuthor = firstGroup.getOperand(2).getOperand(0);
    oldAuthor.key("title");
    oldAuthor.value("Der Birnbaum");
    
    // Structur is now:
    // or(doc, and(doc, doc, or(doc, doc)))
    expect(vc.toQuery()).toEqual(
      'author = "Max Birkendale" | (pubDate since 2014-05-12 & pubDate until 2014-12-05 & (title = "Der Birnbaum" | pubDate in 2014-12-05))'
    );

    var andGroup = vc.root().getOperand(1);

    // Get leading docs in and
    var doc1 = andGroup.getOperand(0);
    expect(doc1.ldType()).toEqual("doc");
    expect(doc1.value()).toEqual("2014-05-12");
    var doc2 = andGroup.getOperand(1);
    expect(doc2.ldType()).toEqual("doc");
    expect(doc2.value()).toEqual("2014-12-05");

    // Remove 2
    expect(andGroup.delOperand(doc2).update().operation()).toEqual("and");
    // Structur is now:
    // or(doc, and(doc, or(doc, doc)))

    expect(vc.toQuery()).toEqual(
      'author = "Max Birkendale"' +
	' | (pubDate since 2014-05-12 & ' +
	'(title = "Der Birnbaum" | pubDate in 2014-12-05))'
    );


    // Remove 1
    expect(andGroup.delOperand(doc1).update().operation()).toEqual("or");
    // Structur is now:
    // or(doc, doc, doc)

    expect(vc.toQuery()).toEqual(
      'author = "Max Birkendale" | title = "Der Birnbaum" | pubDate in 2014-12-05'
    );
  });

  it('should be reducible to unspecification', function () {
    var vc = demoFactory.create();

    expect(vc.toQuery()).toEqual(vc.root().toQuery());

    expect(vc.toQuery()).toEqual(
      '(Titel = "Baum" & Veröffentlichungsort = "hihi" & ' +
	'(Titel = "Baum" | Veröffentlichungsort = "hihi")) ' +
	'| Untertitel = "huhu"');

    expect(vc.root().element().lastChild.children[0].firstChild.nodeValue).toEqual('and');
    expect(vc.root().element().lastChild.children[1].firstChild.nodeValue).toEqual('×');
    expect(vc.root().delOperand(vc.root().getOperand(0)).update()).not.toBeUndefined();
    expect(vc.toQuery()).toEqual('Untertitel = "huhu"');

    var lc = vc.root().element().lastChild;
    expect(lc.children[0].firstChild.nodeValue).toEqual('and');
    expect(lc.children[1].firstChild.nodeValue).toEqual('or');
    expect(lc.children[2].firstChild.nodeValue).toEqual('×');

    // Clean everything
    vc.clean();
    expect(vc.toQuery()).toEqual('⋯');
  });
});

describe('KorAP.Operators', function () {
  it('should be initializable', function () {
    var op = KorAP.Operators.create(true, false, false);
    expect(op.and()).toBeTruthy();
    expect(op.or()).not.toBeTruthy();
    expect(op.del()).not.toBeTruthy();

    op.and(false);
    expect(op.and()).not.toBeTruthy();
    expect(op.or()).not.toBeTruthy();
    expect(op.del()).not.toBeTruthy();

    op.or(true);
    op.del(true);
    expect(op.and()).not.toBeTruthy();
    expect(op.or()).toBeTruthy();
    expect(op.del()).toBeTruthy();

    var e = op.element();
    expect(e.getAttribute('class')).toEqual('operators');
    expect(e.children[0].getAttribute('class')).toEqual('or');
    expect(e.children[0].firstChild.data).toEqual('or');
    expect(e.children[1].getAttribute('class')).toEqual('delete');
    expect(e.children[1].firstChild.data).toEqual('×');

    op.and(true);
    op.del(false);
    op.update();

    e = op.element();
    expect(e.getAttribute('class')).toEqual('operators');
    expect(e.children[0].getAttribute('class')).toEqual('and');
    expect(e.children[0].firstChild.data).toEqual('and');
    expect(e.children[1].getAttribute('class')).toEqual('or');
    expect(e.children[1].firstChild.data).toEqual('or');
  });
});

describe('KorAP._delete (event)', function () {
  var complexVCFactory = buildFactory(KorAP.VirtualCollection,{
    "@type": 'korap:docGroup',
    'operation' : 'operation:and',
    'operands' : [
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:eq',
	"value": '2014-12-05',
	"type": 'type:date'
      },
      {
	"@type" : 'korap:docGroup',
	'operation' : 'operation:or',
	'operands' : [
	  {
	    '@type' : 'korap:doc',
	    'key' : 'title',
	    'value' : 'Hello World!'
	  },
	  {
	    '@type' : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    ]
  });

  it('should clean on root docs', function () {
    var vc = KorAP.VirtualCollection.render({
      "@type": 'korap:doc',
      "key": 'pubDate',
      "match": 'match:eq',
      "value": '2014-12-05',
      "type": 'type:date'
    });
    expect(vc.root().toQuery()).toEqual('pubDate in 2014-12-05');
    expect(vc.root().element().lastChild.getAttribute('class')).toEqual('operators');

    // Clean with delete from root
    expect(vc.root().element().lastChild.lastChild.getAttribute('class')).toEqual('delete');
    _delOn(vc.root());
    expect(vc.root().toQuery()).toEqual('⋯');
    expect(vc.root().element().lastChild.lastChild.data).toEqual('⋯');
  });

  it ('should remove on nested docs', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:and',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    );

    // Delete with direct element access
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');
    _delOn(vc.root().getOperand(0));

    expect(vc.toQuery()).toEqual('foo = "bar"');
    expect(vc.root().ldType()).toEqual('doc');
  });

  it ('should clean on doc groups', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:and',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    );

    // Cleanwith direct element access
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');
    _delOn(vc.root());
    expect(vc.toQuery()).toEqual('⋯');
    expect(vc.root().ldType()).toEqual('non');
  });

  it ('should remove on nested doc groups (case of ungrouping 1)', function () {
    var vc = complexVCFactory.create();

    // Delete with direct element access
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 & (title = "Hello World!" | foo = "bar")'
    );

    // Remove hello world:
    _delOn(vc.root().getOperand(1).getOperand(0));
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');
    expect(vc.root().ldType()).toEqual('docGroup');
  });

  it ('should remove on nested doc groups (case of ungrouping 2)', function () {
    var vc = complexVCFactory.create();

    // Delete with direct element access
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 & (title = "Hello World!" | foo = "bar")'
    );

    // Remove bar
    _delOn(vc.root().getOperand(1).getOperand(1));
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & title = "Hello World!"');
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('and');
  });

  it ('should remove on nested doc groups (case of root changing)', function () {
    var vc = complexVCFactory.create();

    // Delete with direct element access
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 & (title = "Hello World!" | foo = "bar")'
    );

    // Remove bar
    _delOn(vc.root().getOperand(0));
    expect(vc.toQuery()).toEqual('title = "Hello World!" | foo = "bar"');
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');
  });

  it ('should remove on nested doc groups (list flattening)', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:or',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  },
	  {
	    "@type": 'korap:docGroup',
	    'operation' : 'operation:and',
	    'operands' : [
	      {
		"@type": 'korap:doc',
		"key": 'pubDate',
		"match": 'match:eq',
		"value": '2014-12-05',
		"type": 'type:date'
	      },
	      {
		"@type" : 'korap:docGroup',
		'operation' : 'operation:or',
		'operands' : [
		  {
		    '@type' : 'korap:doc',
		    'key' : 'title',
		    'value' : 'Hello World!'
		  },
		  {
		    '@type' : 'korap:doc',
		    'key' : 'yeah',
		    'value' : 'juhu'
		  }
		]
	      }
	    ]
	  }
	]
      }
    );

    // Delete with direct element access
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 | foo = "bar" | ' +
	'(pubDate in 2014-12-05 & ' +
	'(title = "Hello World!" | yeah = "juhu"))'
    );

    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');

    // Operands and operators
    expect(vc.element().firstChild.children.length).toEqual(4);
    expect(vc.element().firstChild.lastChild.getAttribute('class')).toEqual('operators');

    // Remove inner group and flatten
    _delOn(vc.root().getOperand(2).getOperand(0));

    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 | foo = "bar" | title = "Hello World!" | yeah = "juhu"'
    );
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');

    // Operands and operators
    expect(vc.element().firstChild.children.length).toEqual(5);
    expect(vc.element().firstChild.lastChild.getAttribute('class')).toEqual('operators');
  });
});

describe('KorAP._add (event)', function () {
  var complexVCFactory = buildFactory(KorAP.VirtualCollection,{
    "@type": 'korap:docGroup',
    'operation' : 'operation:and',
    'operands' : [
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:eq',
	"value": '2014-12-05',
	"type": 'type:date'
      },
      {
	"@type" : 'korap:docGroup',
	'operation' : 'operation:or',
	'operands' : [
	  {
	    '@type' : 'korap:doc',
	    'key' : 'title',
	    'value' : 'Hello World!'
	  },
	  {
	    '@type' : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    ]
  });

  it ('should add new unspecified doc with "and"', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:and',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    );

    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');

    var fc = vc.element().firstChild;
    expect(fc.getAttribute('data-operation')).toEqual('and');
    expect(fc.children.length).toEqual(3);
    expect(fc.lastChild.getAttribute('class')).toEqual('operators');
    expect(fc.children[0].getAttribute('class')).toEqual('doc');
    expect(fc.children[1].getAttribute('class')).toEqual('doc');

    // add with 'and' in the middle
    _andOn(vc.root().getOperand(0));
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');

    fc = vc.element().firstChild;
    expect(fc.getAttribute('data-operation')).toEqual('and');
    expect(fc.children.length).toEqual(4);
    expect(fc.lastChild.getAttribute('class')).toEqual('operators');

    expect(fc.children[0].getAttribute('class')).toEqual('doc');
    expect(fc.children[1].getAttribute('class')).toEqual('doc unspecified');
    expect(fc.children[2].getAttribute('class')).toEqual('doc');
  });

  it ('should add new unspecified doc with "or"', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:and',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    );

    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');

    var fc = vc.element().firstChild;
    expect(fc.children.length).toEqual(3);
    expect(fc.lastChild.getAttribute('class')).toEqual('operators');
    expect(fc.children[0].getAttribute('class')).toEqual('doc');
    expect(fc.children[1].getAttribute('class')).toEqual('doc');

    // add with 'or' in the middle
    _orOn(vc.root().getOperand(0));
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');
    fc = vc.element().firstChild;

    expect(fc.getAttribute('data-operation')).toEqual('and');
    expect(fc.children.length).toEqual(3);
    expect(fc.children[0].getAttribute('class')).toEqual('docGroup');
    expect(fc.children[0].getAttribute('data-operation')).toEqual('or');
    expect(fc.children[1].getAttribute('class')).toEqual('doc');
    expect(fc.children[2].getAttribute('class')).toEqual('operators');
    expect(fc.lastChild.getAttribute('class')).toEqual('operators');

    fc = vc.element().firstChild.firstChild;
    expect(fc.children.length).toEqual(3);
    expect(fc.children[0].getAttribute('class')).toEqual('doc');
    expect(fc.children[1].getAttribute('class')).toEqual('doc unspecified');
    expect(fc.children[2].getAttribute('class')).toEqual('operators');
    expect(fc.lastChild.getAttribute('class')).toEqual('operators');
  });

  it ('should add new unspecified doc with "and" before group', function () {
    var vc = demoFactory.create();

    // Wrap with direct element access
    expect(vc.toQuery()).toEqual(
      '(Titel = "Baum" & Veröffentlichungsort = "hihi" & (Titel = "Baum" | Veröffentlichungsort = "hihi")) | Untertitel = "huhu"'
    );

    expect(vc.root().getOperand(0).ldType()).toEqual('docGroup');
    expect(vc.root().getOperand(0).operation()).toEqual('and');
    expect(vc.root().getOperand(0).operands().length).toEqual(3);

    // Add unspecified on the second doc
    var secDoc = vc.root().getOperand(0).getOperand(1);
    expect(secDoc.value()).toEqual('hihi');

    // Add
    _andOn(secDoc);

    var fo = vc.root().getOperand(0);

    expect(fo.ldType()).toEqual('docGroup');
    expect(fo.operation()).toEqual('and');
    expect(fo.operands().length).toEqual(4);

    expect(fo.getOperand(0).ldType()).toEqual('doc');
    expect(fo.getOperand(1).ldType()).toEqual('doc');
    expect(fo.getOperand(2).ldType()).toEqual('non');
    expect(fo.getOperand(3).ldType()).toEqual('docGroup');
  });


  it ('should remove a doc with an unspecified doc in a nested group', function () {
    var vc = demoFactory.create();

    // Wrap with direct element access
    expect(vc.toQuery()).toEqual(
      '(Titel = "Baum" & Veröffentlichungsort = "hihi" & (Titel = "Baum" | Veröffentlichungsort = "hihi")) | Untertitel = "huhu"'
    );

    var fo = vc.root().getOperand(0).getOperand(0);
    expect(fo.key()).toEqual('Titel');
    expect(fo.value()).toEqual('Baum');

    // Add unspecified on the root group
    _orOn(fo);

    fo = vc.root().getOperand(0).getOperand(0);

    expect(fo.operation()).toEqual('or');
    expect(fo.getOperand(0).ldType()).toEqual('doc');
    expect(fo.getOperand(1).ldType()).toEqual('non');

    // Delete document
    _delOn(fo.getOperand(0));

    // The operand is now non
    expect(vc.root().getOperand(0).getOperand(0).ldType()).toEqual('non');
    expect(vc.root().getOperand(0).getOperand(1).ldType()).toEqual('doc');
    expect(vc.root().getOperand(0).getOperand(2).ldType()).toEqual('docGroup');
  });

  it ('should remove an unspecified doc with an doc in a nested group', function () {
    var vc = demoFactory.create();

    // Wrap with direct element access
    expect(vc.toQuery()).toEqual(
      '(Titel = "Baum" & Veröffentlichungsort = "hihi" & (Titel = "Baum" | Veröffentlichungsort = "hihi")) | Untertitel = "huhu"'
    );

    var fo = vc.root().getOperand(0).getOperand(0);
    expect(fo.key()).toEqual('Titel');
    expect(fo.value()).toEqual('Baum');

    // Add unspecified on the root group
    _orOn(fo);

    fo = vc.root().getOperand(0).getOperand(0);

    expect(fo.operation()).toEqual('or');
    expect(fo.getOperand(0).ldType()).toEqual('doc');
    expect(fo.getOperand(1).ldType()).toEqual('non');

    // Delete unspecified doc
    _delOn(fo.getOperand(1));

    // The operand is now non
    fo = vc.root().getOperand(0);
    expect(fo.getOperand(0).ldType()).toEqual('doc');
    expect(fo.getOperand(0).key()).toEqual('Titel');
    expect(fo.getOperand(0).value()).toEqual('Baum');
    expect(fo.getOperand(1).ldType()).toEqual('doc');
    expect(fo.getOperand(2).ldType()).toEqual('docGroup');
  });


  it ('should add on parent group (case "and")', function () {
    var vc = complexVCFactory.create();

    // Wrap with direct element access
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 & (title = "Hello World!" | foo = "bar")'
    );

    expect(vc.root().operands().length).toEqual(2);

    // Add unspecified on the root group
    _andOn(vc.root().getOperand(1));
    expect(vc.toQuery()).toEqual(
      'pubDate in 2014-12-05 & (title = "Hello World!" | foo = "bar")'
    );

    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operands().length).toEqual(3);
    expect(vc.root().getOperand(0).ldType()).toEqual('doc');
    expect(vc.root().getOperand(1).ldType()).toEqual('docGroup');
    expect(vc.root().getOperand(1).operation()).toEqual('or');
    expect(vc.root().getOperand(2).ldType()).toEqual('non');

    // Add another unspecified on the root group
    _andOn(vc.root().getOperand(1));

    expect(vc.root().operands().length).toEqual(4);
    expect(vc.root().getOperand(0).ldType()).toEqual('doc');
    expect(vc.root().getOperand(1).ldType()).toEqual('docGroup');
    expect(vc.root().getOperand(2).ldType()).toEqual('non');
    expect(vc.root().getOperand(3).ldType()).toEqual('non');

    // Add another unspecified after the first doc
    _andOn(vc.root().getOperand(0));

    expect(vc.root().operands().length).toEqual(5);
    expect(vc.root().getOperand(0).ldType()).toEqual('doc');
    expect(vc.root().getOperand(1).ldType()).toEqual('non');
    expect(vc.root().getOperand(2).ldType()).toEqual('docGroup');
    expect(vc.root().getOperand(3).ldType()).toEqual('non');
    expect(vc.root().getOperand(4).ldType()).toEqual('non');
  });

  it ('should wrap on root', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:and',
	'operands' : [
	  {
	    "@type": 'korap:doc',
	    "key": 'pubDate',
	    "match": 'match:eq',
	    "value": '2014-12-05',
	    "type": 'type:date'
	  },
	  {
	    "@type" : 'korap:doc',
	    'key' : 'foo',
	    'value' : 'bar'
	  }
	]
      }
    );

    // Wrap on root
    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05 & foo = "bar"');
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('and');
    _orOn(vc.root());
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');

    expect(vc.root().getOperand(0).ldType()).toEqual('docGroup');
    expect(vc.root().getOperand(0).operation()).toEqual('and');
  });

  it ('should add on root (case "and")', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:eq',
	"value": '2014-12-05',
	"type": 'type:date'
      }
    );

    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05');
    expect(vc.root().ldType()).toEqual('doc');
    expect(vc.root().key()).toEqual('pubDate');
    expect(vc.root().value()).toEqual('2014-12-05');

    // Wrap on root
    _andOn(vc.root());
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('and');
  });

  it ('should add on root (case "or")', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:doc',
	"key": 'pubDate',
	"match": 'match:eq',
	"value": '2014-12-05',
	"type": 'type:date'
      }
    );

    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05');
    expect(vc.root().key()).toEqual('pubDate');
    expect(vc.root().value()).toEqual('2014-12-05');

    // Wrap on root
    _orOn(vc.root());
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');
  });

  it ('should support multiple sub groups per group', function () {
    var vc = KorAP.VirtualCollection.render(
      {
	"@type": 'korap:docGroup',
	'operation' : 'operation:or',
	'operands' : [
	  {
	    "@type": 'korap:docGroup',
	    'operation' : 'operation:and',
	    'operands' : [
	      {
		"@type": 'korap:doc',
		"key": 'title',
		"value": 't1',
	      },
	      {
		"@type" : 'korap:doc',
		'key' : 'title',
		'value' : 't2'
	      }
	    ]
	  },
	  {
	    "@type": 'korap:docGroup',
	    'operation' : 'operation:and',
	    'operands' : [
	      {
		"@type": 'korap:doc',
		"key": 'title',
		"value": 't3',
	      },
	      {
		"@type" : 'korap:doc',
		'key' : 'title',
		'value' : 't4'
	      }
	    ]
	  }
	]
      }
    );

    expect(vc.toQuery()).toEqual('pubDate in 2014-12-05');
    expect(vc.root().key()).toEqual('pubDate');
    expect(vc.root().value()).toEqual('2014-12-05');

    // Wrap on root
    _orOn(vc.root());
    expect(vc.root().ldType()).toEqual('docGroup');
    expect(vc.root().operation()).toEqual('or');
  });
});