all these changes

frontend/node_modules/density-clustering/test/PriorityQueue.test.js

@@ -0,0 +1,27 @@
+require('should');
+var PriorityQueue = require('../lib/index.js').PriorityQueue;
+
+describe('PriorityQueue', function() {
+
+  describe('insert', function() {
+    it('should return correct result', function() {
+      var p = new PriorityQueue();
+      p.insert(1, 4);
+      p.insert(2, 1);
+      p.insert(3, 2);
+      p.insert(4, 3);
+
+      p.getElements().should.eql([1, 4, 3, 2]);
+      p.getPriorities().should.eql([4, 3, 2, 1]);
+    });
+  });
+
+  describe('init', function() {
+    it('should initialize queue correctly', function() {
+      var p = new PriorityQueue([1, 2, 3, 4], [4, 1, 2, 3]);
+
+      p.getElements().should.eql([1, 4, 3, 2]);
+      p.getPriorities().should.eql([4, 3, 2, 1]);
+    });
+  });
+});