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build/node_modules/queue-fifo/test/queue-test.js

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+/* globals describe it beforeEach afterEach */
+var chai = require('chai');
+var Queue = require('../');
+
+chai.should();
+
+describe('Queue Unit Tests', function() {
+
+    var queue;
+
+    beforeEach(function () {
+        queue = new Queue();
+    });
+
+    afterEach(function () {
+        queue = null;
+    });
+
+    it('should have a working test environment', function() {
+        true.should.equal(true);
+    });
+
+    it('should instantiate a queue instance', function () {
+        queue.should.be.ok;
+    });
+
+    it('should be empty when first instantiated', function () {
+        queue.isEmpty().should.equal(true);
+        queue.size().should.equal(0);
+    });
+
+    it('should queue up data at the back of queue', function () {
+        queue.enqueue('some test data');
+        queue.enqueue('some more test data');
+        queue.enqueue('and yet some more...');
+        queue.size().should.equal(3);
+    });
+
+    it('should dequeue data from the front of the queue', function () {
+        queue.enqueue('some test data');
+        queue.enqueue('some more test data');
+        queue.enqueue('and yet some more...');
+        queue.size().should.equal(3);
+
+        var first = queue.dequeue();
+        first.should.equal('some test data');
+
+        queue.size().should.equal(2);
+
+        queue.dequeue().should.equal('some more test data');
+        queue.size().should.equal(1);
+    });
+
+    it('should peek at the data at the front of the queue', function () {
+        queue.enqueue('some test data');
+        queue.enqueue('some more test data');
+        queue.enqueue('and yet some more');
+        queue.enqueue('and even more data');
+        queue.size().should.equal(4);
+        var first = queue.peek();
+        first.should.equal('some test data');
+        queue.size().should.equal(4);
+    });
+
+    it('should clear the queue of all data', function () {
+        queue.enqueue('some test data');
+        queue.enqueue('some more test data');
+        queue.enqueue('and yet some more');
+        queue.enqueue('and even more data');
+        queue.size().should.equal(4);
+        queue.clear();
+        queue.size().should.equal(0);
+        queue.isEmpty().should.equal(true);
+    });
+});