Specify and implement election structure.

@@ -10,12 +10,14 @@
      *
      * @constructor
      * @property {Candidate[]} candidateList
+     * @property {String[]} votes
      * @property {Number} numberOfCandidates
      *
      */
     function RelativePlacement() {
         Object.defineProperties(this, {
             candidateList:      {value: {}},
+            votes:              {value: []},
             numberOfCandidates: {get: () => Object.keys(this.candidateList).length}
         });
     }
@@ -43,15 +45,50 @@
         }
     };
 
-    RelativePlacement.prototype.addVote = function () {};
+    /**
+     * @name addVote
+     * @param {String[]} vote
+     * @methodOf RelativePlacement
+     * @this RelativePlacement
+     */
+    RelativePlacement.prototype.addVote = function (vote) {
+        if(vote.length != this.numberOfCandidates)
+            throw new Error('The vote and the candidate list have not the same size.');
+
+        var candidates = Object.keys(this.candidateList);
+        var controlMask = Math.pow(2,candidates.length)-1;
+        var checkMask = 0;
+
+        for(let i = 0; i < vote.length; i++){
+            var index = candidates.indexOf(vote[i]);
+            if(index == -1) throw new Error('The candidate "'+vote[i]+"' is not present in candidate list.");
+            checkMask |= Math.pow(2, index);
+        }
+
+        if(checkMask != controlMask) throw new Error('Candidate must be unique in each vote.');
+
+        this.votes.push(vote);
+        for(let i = 0; i < vote.length; i++){
+            let candidate = this.candidateList[vote[i]];
+            candidate.votes.push(i);
+        }
+    };
     RelativePlacement.prototype.addVotes = function () {};
     RelativePlacement.prototype.getResult = function () {};
 
+    /**
+     *
+     * @param name
+     * @constructor
+     * @property {String} name
+     * @property {Number[]} votes
+     * @property {Number[]} placements
+     */
     function Candidate(name) {
         Object.defineProperties(this, {
             name:       {value: name,   enumerable: true},
             votes:      {value:[],      enumerable: true},
-            placement:  {value:[],      enumerable: false}
+            placements: {value:[],      enumerable: true, writable: true}
         });
     }
 

@@ -32,9 +32,9 @@ describe('RelativePlacement', () => {
             assert.equal(1, election.numberOfCandidates);
             assert.deepEqual({
                 name: 'foo',
-                votes:[]
+                votes:[],
+                placements: []
             }, election.candidateList['foo']);
-            assert.deepEqual([], election.candidateList['foo'].placement);
         });
 
         it('should add some candidates', () => {
@@ -44,16 +44,86 @@ describe('RelativePlacement', () => {
 
             assert.deepEqual({
                 name: 'foo',
-                votes:[]
+                votes:[],
+                placements: []
             }, election.candidateList['foo']);
             assert.deepEqual({
                 name: 'bar',
-                votes:[]
+                votes:[],
+                placements: []
             }, election.candidateList['bar']);
         });
 
         it('should not add a same candidate multiple time', () => {
+            assert.equal(0, election.numberOfCandidates);
+            election.addCandidate('foo');
+            assert.equal(1, election.numberOfCandidates);
+            assert.throws(()=>{
+                election.addCandidate('foo');
+            }, (err) => {
+                return err instanceof Error && /already exist/.test(err.message);
+            },
+                'unexpected error'
+            );
+            assert.equal(1, election.numberOfCandidates);
+        });
+    });
+
+    describe('Add votes', () => {
+        var election;
+
+        beforeEach(()=> {
+            election = new RelativePlacement();
+            election.addCandidates(['A','B','C']);
+        });
+
+        it('should add a vote to each candidates', () => {
+            var vote = ['A','B','C'];
+            election.addVote(['A','B','C']);
+            for(let i = 0; i < vote.length; i++){
+                let candidate = election.candidateList[vote[i]];
+                assert.equal(candidate.votes.length, 1, 'number of candidates vote');
+                assert.equal(candidate.votes[0], i, 'value of candidates vote');
+            }
+        });
+
+        it('should has same sizes between candidate list and vote', () => {
+            assert.throws(() => {
+                    election.addVote(['A','B']);
+                },
+                err => err instanceof Error && /same size/.test(err.message),
+                'smaller vote'
+            );
+            assert.equal(election.votes.length, 0, 'no vote registered');
+            assert.equal(election.candidateList['A'].votes.length, 0, 'no vote registered in candidate');
+
+            assert.throws(() => {
+                    election.addVote(['A','B','C','D']);
+                },
+                err => err instanceof Error && /same size/.test(err.message),
+                'bigger vote'
+            );
+            assert.equal(election.votes.length, 0, 'no vote registered');
+            assert.equal(election.candidateList['A'].votes.length, 0, 'no vote registered in candidate');
+        });
+
+        it('should not has unknown candidate in vote', () => {
+            assert.throws(() => {
+                election.addVote(['A','B','D']);
+            },
+                err => err instanceof Error && /not present/.test(err.message));
+
+            assert.equal(election.votes.length, 0, 'no vote registered');
+            assert.equal(election.candidateList['A'].votes.length, 0, 'no vote registered in candidate');
+        });
 
+        it('should has an unique vote by candidate', () => {
+            assert.throws(() => {
+                election.addVote(['A','B','A']);
+            },
+                err => err instanceof Error && /unique/.test(err.message));
+            assert.equal(election.votes.length, 0, 'no vote registered');
+            assert.equal(election.candidateList['A'].votes.length, 0, 'no vote registered in candidate');
         });
     });
 });
\ No newline at end of file

 [
   {
+    "comment": "The most fundamentally",
+    "votes":{
+      "A": [1,1,1],
+      "B": [2,2,2],
+      "C": [3,3,3]
+    },
+    "result": ["A","B","C"]
+  },
+  {
     "votes":{
       "320": [1,1,1,1,1],
       "284": [2,4,2,4,3],