Restructured Test Suite

- separated tests into e2e and unit directories
- created configs directory structure to support test framework
- added/modified `npm run test`, `npm run test:unit` and `npm run test:e2e` to target all, unit and e2e tests respectively
- modified some of the test names to be more descriptive

New structure of the Test Suite has following directory tree:

```
tests
├── configs
│   ├── env.js
│   └── modules
│       ├── clock
│       │   ├── clock_12hr.js
│       │   ├── clock_24hr.js
│       │   └── clock_showPeriodUpper.js
│       └── helloworld
│           └── helloworld.js
├── e2e
│   ├── env_spec.js
│   └── modules
│       ├── clock_spec.js
│       └── helloworld_spec.js
└── unit
    ├── functions
    │   └── cmp_versions_spec.js
    └── global_vars
        └── root_path_spec.js
```

tests/e2e/modules/clock_spec.js

@@ -0,0 +1,103 @@
+const Application = require("spectron").Application;
+const path = require("path");
+const chai = require("chai");
+const chaiAsPromised = require("chai-as-promised");
+
+
+
+var electronPath = path.join(__dirname, "../../../", "node_modules", ".bin", "electron");
+
+if (process.platform === "win32") {
+	electronPath += ".cmd";
+}
+
+var appPath = path.join(__dirname, "../../../js/electron.js");
+
+var app = new Application({
+	path: electronPath,
+	args: [appPath]
+});
+
+global.before(function () {
+	chai.should();
+	chai.use(chaiAsPromised);
+});
+
+describe("Clock module", function () {
+	this.timeout(10000);
+
+	describe("with default 24hr clock config", function() {
+		before(function() {
+			// Set config sample for use in test
+			process.env.MM_CONFIG_FILE = "tests/configs/modules/clock/clock_24hr.js";
+		});
+
+		beforeEach(function (done) {
+			app.start().then(function() { done(); } );
+		});
+
+		afterEach(function (done) {
+			app.stop().then(function() { done(); });
+		});
+
+		it("shows date with correct format", function () {
+			const dateRegex = /^(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday), (?:January|February|March|April|May|June|July|August|September|October|November|December) \d{1,2}, \d{4}$/;
+			return app.client.waitUntilWindowLoaded()
+		 		.getText(".clock .date").should.eventually.match(dateRegex);
+		});
+
+		it("shows time in 24hr format", function() {
+			const timeRegex = /^(?:2[0-3]|[01]\d):[0-5]\d[0-5]\d$/
+			return app.client.waitUntilWindowLoaded()
+		 		.getText(".clock .time").should.eventually.match(timeRegex);
+		});
+	});
+
+	describe("with default 12hr clock config", function() {
+		before(function() {
+			// Set config sample for use in test
+			process.env.MM_CONFIG_FILE = "tests/configs/modules/clock/clock_12hr.js";
+		});
+
+		beforeEach(function (done) {
+			app.start().then(function() { done(); } );
+		});
+
+		afterEach(function (done) {
+			app.stop().then(function() { done(); });
+		});
+
+		it("shows date with correct format", function () {
+			const dateRegex = /^(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday), (?:January|February|March|April|May|June|July|August|September|October|November|December) \d{1,2}, \d{4}$/;
+			return app.client.waitUntilWindowLoaded()
+		 		.getText(".clock .date").should.eventually.match(dateRegex);
+		});
+
+		it("shows time in 12hr format", function() {
+			const timeRegex = /^(?:1[0-2]|[0]\d):[0-5]\d[0-5]\d[ap]m$/;
+			return app.client.waitUntilWindowLoaded()
+		 		.getText(".clock .time").should.eventually.match(timeRegex);
+		});
+	});
+
+	describe("with showPeriodUpper config enabled", function() {
+		before(function() {
+			// Set config sample for use in test
+			process.env.MM_CONFIG_FILE = "tests/configs/modules/clock/clock_showPeriodUpper.js";
+		});
+
+		beforeEach(function (done) {
+			app.start().then(function() { done(); } );
+		});
+
+		afterEach(function (done) {
+			app.stop().then(function() { done(); });
+		});
+
+		it("shows 12hr time with upper case AM/PM", function() {
+			const timeRegex = /^(?:1[0-2]|[0]\d):[0-5]\d[0-5]\d[AP]M$/;
+			return app.client.waitUntilWindowLoaded()
+		 		.getText(".clock .time").should.eventually.match(timeRegex);
+		});
+	});
+});