Changed VMs references to database singleton

Added some unit tests (WIP)

ModernKeePassApp.Test/ViewModelsTests.cs

@@ -0,0 +1,40 @@
+using System.Linq;
+using Windows.ApplicationModel;
+using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
+using ModernKeePass.ViewModels;
+using ModernKeePassApp.Test.Mock;
+
+namespace ModernKeePassApp.Test
+{
+    [TestClass]
+    public class ViewModelsTests
+    {
+        [TestMethod]
+        public void TestAboutVm()
+        {
+            var aboutVm = new AboutVm(Package.Current);
+            Assert.AreEqual("1.0", aboutVm.Version);
+        }
+
+        [TestMethod]
+        public void TestMainVm()
+        {
+            var database = new DatabaseHelperMock();
+            var mainVm = new MainVm(null, null, database);
+            Assert.AreEqual(1, mainVm.MainMenuItems.Count());
+            var firstGroup = mainVm.MainMenuItems.FirstOrDefault();
+            Assert.AreEqual(5, firstGroup.Count());
+
+            database.Status = 1;
+            mainVm = new MainVm(null, null, database);
+            Assert.IsNotNull(mainVm.SelectedItem);
+            Assert.AreEqual("Open", ((MainMenuItemVm)mainVm.SelectedItem).Title);
+
+            database.Status = 2;
+            mainVm = new MainVm(null, null, database);
+            Assert.IsNotNull(mainVm.SelectedItem);
+            Assert.AreEqual(2, mainVm.MainMenuItems.Count());
+            Assert.AreEqual("Save", ((MainMenuItemVm)mainVm.SelectedItem).Title);
+        }
+    }
+}