test(message-component): Add message model specification

Add message model unit tests

Author: roalcantara

src/app/shared/message/message.model.spec.ts

@@ -0,0 +1,23 @@
+import {
+  beforeEach, beforeEachProviders,
+  describe, xdescribe,
+  expect, it, xit,
+  async, inject
+} from '@angular/core/testing';
+
+import { Message } from './message.model';
+
+describe('Model: Message', () => {
+  it('should construct without Type, Title nor Description', () => {
+    this.model = new Message();
+    expect(this.model.type).toBeUndefined();
+    expect(this.model.title).toBeUndefined();
+    expect(this.model.description).toBeUndefined();
+  });
+  it('should construct with Type, Title and Description', () => {
+    this.model = new Message('success', 'title', 'description');
+    expect(this.model.type).toBe('success');
+    expect(this.model.title).toBe('title');
+    expect(this.model.description).toBe('description');
+  });
+});