[Settings] KBM Migrated KBM Settings Tests (#5821)

* added MSTest project

* enabled settings tests run in the build pipeline

* migrated KBM settings

* fixed typo

* moved the callback function initialization to the top

* fixed build

src/core/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/KeyboardManager.cs

@@ -0,0 +1,134 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.PowerToys.Settings.UI.Lib;
+using Microsoft.PowerToys.Settings.UI.Lib.ViewModels;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class KeyboardManager
+    {
+        public const string Module = "Keyboard Manager";
+
+        [TestInitialize]
+        public void Setup()
+        {
+        }
+
+        [TestCleanup]
+        public void CleanUp()
+        {
+        }
+
+        [TestMethod]
+        public void CombineShortcutLists_ShouldReturnEmptyList_WhenBothArgumentsAreEmptyLists()
+        {
+            // arrange
+            var firstList = new List<KeysDataModel>();
+            var secondList = new List<AppSpecificKeysDataModel>();
+
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(firstList, secondList);
+
+            // Assert
+            var expectedResult = new List<AppSpecificKeysDataModel>();
+
+            Assert.AreEqual(expectedResult.Count(), result.Count());
+        }
+
+        [TestMethod]
+        public void CombineShortcutLists_ShouldReturnListWithOneAllAppsEntry_WhenFirstArgumentHasOneEntryAndSecondArgumentIsEmpty()
+        {
+            // arrange
+            var firstList = new List<KeysDataModel>();
+            var entry = new KeysDataModel();
+            entry.OriginalKeys = "17;65";
+            entry.NewRemapKeys = "17;86";
+            firstList.Add(entry);
+            var secondList = new List<AppSpecificKeysDataModel>();
+
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(firstList, secondList);
+
+            // Assert
+            var expectedResult = new List<AppSpecificKeysDataModel>();
+            var expectedEntry = new AppSpecificKeysDataModel();
+            expectedEntry.OriginalKeys = entry.OriginalKeys;
+            expectedEntry.NewRemapKeys = entry.NewRemapKeys;
+            expectedEntry.TargetApp = "All Apps";
+            expectedResult.Add(expectedEntry);
+            var x = expectedResult[0].Equals(result[0]);
+            Assert.AreEqual(expectedResult.Count(), result.Count());
+            Assert.IsTrue(expectedResult[0].Compare(result[0]));
+        }
+
+        [TestMethod]
+        public void CombineShortcutLists_ShouldReturnListWithOneAppSpecificEntry_WhenFirstArgumentIsEmptyAndSecondArgumentHasOneEntry()
+        {
+            // arrange
+            var firstList = new List<KeysDataModel>();
+            var secondList = new List<AppSpecificKeysDataModel>();
+            var entry = new AppSpecificKeysDataModel();
+            entry.OriginalKeys = "17;65";
+            entry.NewRemapKeys = "17;86";
+            entry.TargetApp = "msedge";
+            secondList.Add(entry);
+
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(firstList, secondList);
+
+            // Assert
+            var expectedResult = new List<AppSpecificKeysDataModel>();
+            var expectedEntry = new AppSpecificKeysDataModel();
+            expectedEntry.OriginalKeys = entry.OriginalKeys;
+            expectedEntry.NewRemapKeys = entry.NewRemapKeys;
+            expectedEntry.TargetApp = entry.TargetApp;
+            expectedResult.Add(expectedEntry);
+
+            Assert.AreEqual(expectedResult.Count(), result.Count());
+            Assert.IsTrue(expectedResult[0].Compare(result[0]));
+        }
+
+        [TestMethod]
+        public void CombineShortcutLists_ShouldReturnListWithOneAllAppsEntryAndOneAppSpecificEntry_WhenFirstArgumentHasOneEntryAndSecondArgumentHasOneEntry()
+        {
+            // arrange
+            var firstList = new List<KeysDataModel>();
+            var firstListEntry = new KeysDataModel();
+            firstListEntry.OriginalKeys = "17;65";
+            firstListEntry.NewRemapKeys = "17;86";
+            firstList.Add(firstListEntry);
+            var secondList = new List<AppSpecificKeysDataModel>();
+            var secondListEntry = new AppSpecificKeysDataModel();
+            secondListEntry.OriginalKeys = "17;66";
+            secondListEntry.NewRemapKeys = "17;87";
+            secondListEntry.TargetApp = "msedge";
+            secondList.Add(secondListEntry);
+
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(firstList, secondList);
+
+            // Assert
+            var expectedResult = new List<AppSpecificKeysDataModel>();
+            var expectedFirstEntry = new AppSpecificKeysDataModel();
+            expectedFirstEntry.OriginalKeys = firstListEntry.OriginalKeys;
+            expectedFirstEntry.NewRemapKeys = firstListEntry.NewRemapKeys;
+            expectedFirstEntry.TargetApp = "All Apps";
+            expectedResult.Add(expectedFirstEntry);
+            var expectedSecondEntry = new AppSpecificKeysDataModel();
+            expectedSecondEntry.OriginalKeys = secondListEntry.OriginalKeys;
+            expectedSecondEntry.NewRemapKeys = secondListEntry.NewRemapKeys;
+            expectedSecondEntry.TargetApp = secondListEntry.TargetApp;
+            expectedResult.Add(expectedSecondEntry);
+
+            Assert.AreEqual(expectedResult.Count(), result.Count());
+            Assert.IsTrue(expectedResult[0].Compare(result[0]));
+            Assert.IsTrue(expectedResult[1].Compare(result[1]));
+        }
+    }
+}