Try out a mockdate class

tests/e2e/modules/compliments_spec.js

@@ -1,6 +1,6 @@
 const helpers = require("../global-setup");
 const expect = require("chai").expect;
-const moment = require("moment");
+const MockDate = require("./mocks/date.js");
 
 const describe = global.describe;
 const it = global.it;
@@ -93,36 +93,20 @@ describe("Compliments module", function() {
 
 	describe("Feature date in compliments module", function() {
 		describe("Set date and empty compliments for anytime, morning, evening and afternoon", function() {
-			let RealDate;
-
 			before(function() {
 				// Set config sample for use in test
 				process.env.MM_CONFIG_FILE = "tests/configs/modules/compliments/compliments_date.js";
-
+				MockDate.set("2000-12-10");
-				RealDate = Date;
-				let customTimeMs = moment("2015-10-12T06:00:00.000Z").valueOf();
-
-				function MockDate() {
-					return new RealDate(customTimeMs);
-				}
-
-				MockDate.now = function () {
-					return new MockDate().valueOf();
-				};
-
-				MockDate.prototype = RealDate.prototype;
-
-				Date = MockDate;
 			});
 
-			it("Show anytime because if configure empty parts of day compliments and set anytime compliments", function() {
+			it("Show happy birthday compliment on special date", function() {
 				return app.client.waitUntilWindowLoaded().getText(".compliments").then(function(text) {
 					expect(text).to.be.oneOf(["Happy birthday, Ada Lovelace!"]);
 				});
 			});
 
 			after(function() {
-				Date = RealDate;
+				MockDate.reset();
 			});
 		});
 	});

tests/e2e/modules/mocks/date.js

@@ -0,0 +1,86 @@
+(function(name, definition) {
+    if (typeof module !== 'undefined') module.exports = definition();
+    else if (typeof define === 'function' && typeof define.amd === 'object') define(definition);
+    else this[name] = definition();
+}('MockDate', function() {
+    "use strict";
+
+    var _Date = Date
+        , _getTimezoneOffset = Date.prototype.getTimezoneOffset
+        , now   = null
+    ;
+
+    function MockDate(y, m, d, h, M, s, ms) {
+        var date;
+
+        switch (arguments.length) {
+
+            case 0:
+                if (now !== null) {
+                    date = new _Date(now);
+                } else {
+                    date = new _Date();
+                }
+                break;
+
+            case 1:
+                date = new _Date(y);
+                break;
+
+            default:
+                d = typeof d === 'undefined' ? 1 : d;
+                h = h || 0;
+                M = M || 0;
+                s = s || 0;
+                ms = ms || 0;
+                date = new _Date(y, m, d, h, M, s, ms);
+                break;
+        }
+
+        return date;
+    }
+
+    MockDate.UTC = _Date.UTC;
+
+    MockDate.now = function() {
+        return new MockDate().valueOf();
+    };
+
+    MockDate.parse = function(dateString) {
+        return _Date.parse(dateString);
+    };
+
+    MockDate.toString = function() {
+        return _Date.toString();
+    };
+
+    MockDate.prototype = _Date.prototype;
+
+    function set(date, timezoneOffset) {
+        var dateObj = new Date(date)
+        if (isNaN(dateObj.getTime())) {
+            throw new TypeError('mockdate: The time set is an invalid date: ' + date)
+        }
+
+        if (typeof timezoneOffset === 'number') {
+            MockDate.prototype.getTimezoneOffset = function() {
+                return timezoneOffset;
+            }
+        }
+
+        Date = MockDate;
+
+        now = dateObj.valueOf();
+    }
+
+    function reset() {
+        Date = _Date;
+        Date.prototype.getTimezoneOffset = _getTimezoneOffset
+    }
+
+    return {
+        set: set,
+        reset: reset
+    };
+
+}));