common: refactor common library pt2 (#8588)

- remove common lib
- split settings, remove common-md
- move ipc interop/kb_layout to interop
- rename core -> settings, settings -> old_settings
- os-detect header-only; interop -> PowerToysInterop
- split notifications, move single-use headers where they're used
- winstore lib
- rename com utils
- rename Updating and Telemetry projects
- rename core -> settings-ui and remove examples folder
- rename settings-ui folder + consisent common/version include

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/ColorPicker.cs

@@ -0,0 +1,74 @@
+// 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.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class ColorPicker
+    {
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.20.1", "settings.json")] // Color picker was introduced in .20
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            // Arrange
+            var mockIOProvider = BackCompatTestProperties.GetModuleIOProvider(version, ColorPickerSettings.ModuleName, fileName);
+            var settingPathMock = new Mock<ISettingsPath>();
+
+            var mockSettingsUtils = new SettingsUtils(mockIOProvider.Object, settingPathMock.Object);
+            ColorPickerSettings originalSettings = mockSettingsUtils.GetSettings<ColorPickerSettings>(ColorPickerSettings.ModuleName);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Act
+            // Initialise View Model with test Config files
+            using (var viewModel = new ColorPickerViewModel(mockSettingsUtils, generalSettingsRepository, ColorPickerIsEnabledByDefaultIPC))
+            {
+                // Assert
+                // Verify that the old settings persisted
+                Assert.AreEqual(originalGeneralSettings.Enabled.ColorPicker, viewModel.IsEnabled);
+                Assert.AreEqual(originalSettings.Properties.ActivationShortcut.ToString(), viewModel.ActivationShortcut.ToString());
+                Assert.AreEqual(originalSettings.Properties.ChangeCursor, viewModel.ChangeCursor);
+
+                // Verify that the stub file was used
+                var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+                BackCompatTestProperties.VerifyModuleIOProviderWasRead(mockIOProvider, ColorPickerSettings.ModuleName, expectedCallCount);
+                BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralIOProvider, expectedCallCount);
+            }
+        }
+
+        [TestMethod]
+        public void ColorPickerIsEnabledByDefault()
+        {
+            var mockSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ColorPickerSettings>();
+            using (var viewModel = new ColorPickerViewModel(ISettingsUtilsMocks.GetStubSettingsUtils<ColorPickerSettings>().Object, SettingsRepository<GeneralSettings>.GetInstance(ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>().Object), ColorPickerIsEnabledByDefaultIPC))
+            {
+                Assert.IsTrue(viewModel.IsEnabled);
+            }
+        }
+
+        private static int ColorPickerIsEnabledByDefaultIPC(string msg)
+        {
+            OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+            Assert.IsTrue(snd.GeneralSettings.Enabled.ColorPicker);
+            return 0;
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/FancyZones.cs

@@ -0,0 +1,435 @@
+// 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;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class FancyZones
+    {
+        public const string FancyZonesTestFolderName = "Test\\FancyZones";
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "settings.json")]
+        [DataRow("v0.19.2", "settings.json")]
+        [DataRow("v0.20.1", "settings.json")]
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+
+            var fileMock = BackCompatTestProperties.GetModuleIOProvider(version, FancyZonesSettings.ModuleName, fileName);
+            var mockSettingsUtils = new SettingsUtils(fileMock.Object, settingPathMock.Object);
+            FancyZonesSettings originalSettings = mockSettingsUtils.GetSettings<FancyZonesSettings>(FancyZonesSettings.ModuleName);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+            var fancyZonesRepository = new BackCompatTestProperties.MockSettingsRepository<FancyZonesSettings>(mockSettingsUtils);
+
+            // Initialise View Model with test Config files
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(generalSettingsRepository, fancyZonesRepository, ColorPickerIsEnabledByDefault_IPC);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.Enabled.FancyZones, viewModel.IsEnabled);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesAppLastZoneMoveWindows.Value, viewModel.AppLastZoneMoveWindows);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesBorderColor.Value, viewModel.ZoneBorderColor);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesDisplayChangeMoveWindows.Value, viewModel.DisplayChangeMoveWindows);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesEditorHotkey.Value.ToString(), viewModel.EditorHotkey.ToString());
+            Assert.AreEqual(originalSettings.Properties.FancyzonesExcludedApps.Value, viewModel.ExcludedApps);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesHighlightOpacity.Value, viewModel.HighlightOpacity);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesInActiveColor.Value, viewModel.ZoneInActiveColor);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesMakeDraggedWindowTransparent.Value, viewModel.MakeDraggedWindowsTransparent);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesMouseSwitch.Value, viewModel.MouseSwitch);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesMoveWindowsAcrossMonitors.Value, viewModel.MoveWindowsAcrossMonitors);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesMoveWindowsBasedOnPosition.Value, viewModel.MoveWindowsBasedOnPosition);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesOpenWindowOnActiveMonitor.Value, viewModel.OpenWindowOnActiveMonitor);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesOverrideSnapHotkeys.Value, viewModel.OverrideSnapHotkeys);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesRestoreSize.Value, viewModel.RestoreSize);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesShiftDrag.Value, viewModel.ShiftDrag);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesShowOnAllMonitors.Value, viewModel.ShowOnAllMonitors);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesSpanZonesAcrossMonitors.Value, viewModel.SpanZonesAcrossMonitors);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesZoneHighlightColor.Value, viewModel.ZoneHighlightColor);
+            Assert.AreEqual(originalSettings.Properties.FancyzonesZoneSetChangeMoveWindows.Value, viewModel.ZoneSetChangeMoveWindows);
+            Assert.AreEqual(originalSettings.Properties.UseCursorposEditorStartupscreen.Value, viewModel.UseCursorPosEditorStartupScreen);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(fileMock, FancyZonesSettings.ModuleName, expectedCallCount);
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralIOProvider, expectedCallCount);
+        }
+
+        private int ColorPickerIsEnabledByDefault_IPC(string msg)
+        {
+            OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+            Assert.IsTrue(snd.GeneralSettings.Enabled.ColorPicker);
+            return 0;
+        }
+
+        private Mock<ISettingsUtils> mockGeneralSettingsUtils;
+
+        private Mock<ISettingsUtils> mockFancyZonesSettingsUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+            mockFancyZonesSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<FancyZonesSettings>();
+        }
+
+        [TestMethod]
+        public void IsEnabledShouldDisableModuleWhenSuccessful()
+        {
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsFalse(snd.GeneralSettings.Enabled.FancyZones);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsTrue(viewModel.IsEnabled); // check if the module is enabled.
+
+            // act
+            viewModel.IsEnabled = false;
+        }
+
+        [TestMethod]
+        public void ShiftDragShouldSetValue2FalseWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsFalse(snd.Powertoys.FancyZones.Properties.FancyzonesShiftDrag.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsTrue(viewModel.ShiftDrag); // check if value was initialized to false.
+
+            // act
+            viewModel.ShiftDrag = false;
+        }
+
+        [TestMethod]
+        public void OverrideSnapHotkeysShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesOverrideSnapHotkeys.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.OverrideSnapHotkeys); // check if value was initialized to false.
+
+            // act
+            viewModel.OverrideSnapHotkeys = true;
+        }
+
+        [TestMethod]
+        public void MoveWindowsBasedOnPositionShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesMoveWindowsBasedOnPosition.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.MoveWindowsBasedOnPosition); // check if value was initialized to false.
+
+            // act
+            viewModel.MoveWindowsBasedOnPosition = true;
+        }
+
+        [TestMethod]
+        public void ZoneSetChangeFlashZonesShouldSetValue2FalseWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesMakeDraggedWindowTransparent.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.MakeDraggedWindowsTransparent); // check if value was initialized to false.
+
+            // act
+            viewModel.MakeDraggedWindowsTransparent = true;
+        }
+
+        [TestMethod]
+        public void MouseSwitchShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesMouseSwitch.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.MouseSwitch); // check if value was initialized to false.
+
+            // act
+            viewModel.MouseSwitch = true;
+        }
+
+        [TestMethod]
+        public void DisplayChangeMoveWindowsShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesDisplayChangeMoveWindows.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.DisplayChangeMoveWindows); // check if value was initialized to false.
+
+            // act
+            viewModel.DisplayChangeMoveWindows = true;
+        }
+
+        [TestMethod]
+        public void ZoneSetChangeMoveWindowsShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesZoneSetChangeMoveWindows.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.ZoneSetChangeMoveWindows); // check if value was initialized to false.
+
+            // act
+            viewModel.ZoneSetChangeMoveWindows = true;
+        }
+
+        [TestMethod]
+        public void AppLastZoneMoveWindowsShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesAppLastZoneMoveWindows.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.AppLastZoneMoveWindows); // check if value was initialized to false.
+
+            // act
+            viewModel.AppLastZoneMoveWindows = true;
+        }
+
+        public void OpenWindowOnActiveMonitorShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesOpenWindowOnActiveMonitor.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.OpenWindowOnActiveMonitor); // check if value was initialized to false.
+
+            // act
+            viewModel.OpenWindowOnActiveMonitor = true;
+        }
+
+        [TestMethod]
+        public void RestoreSizeShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesRestoreSize.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.RestoreSize); // check if value was initialized to false.
+
+            // act
+            viewModel.RestoreSize = true;
+        }
+
+        [TestMethod]
+        public void UseCursorPosEditorStartupScreenShouldSetValue2FalseWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.UseCursorposEditorStartupscreen.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsTrue(viewModel.UseCursorPosEditorStartupScreen); // check if value was initialized to false.
+
+            // act
+            viewModel.UseCursorPosEditorStartupScreen = true;
+        }
+
+        [TestMethod]
+        public void ShowOnAllMonitorsShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.FancyZones.Properties.FancyzonesShowOnAllMonitors.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.IsFalse(viewModel.ShowOnAllMonitors); // check if value was initialized to false.
+
+            // act
+            viewModel.ShowOnAllMonitors = true;
+        }
+
+        [TestMethod]
+        public void ZoneHighlightColorShouldSetColorValue2WhiteWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.AreEqual("#FFFFFF", snd.Powertoys.FancyZones.Properties.FancyzonesZoneHighlightColor.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.AreEqual(ConfigDefaults.DefaultFancyZonesZoneHighlightColor, viewModel.ZoneHighlightColor);
+
+            // act
+            viewModel.ZoneHighlightColor = "#FFFFFF";
+        }
+
+        [TestMethod]
+        public void ZoneBorderColorShouldSetColorValue2WhiteWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.AreEqual("#FFFFFF", snd.Powertoys.FancyZones.Properties.FancyzonesBorderColor.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.AreEqual(ConfigDefaults.DefaultFancyzonesBorderColor, viewModel.ZoneBorderColor);
+
+            // act
+            viewModel.ZoneBorderColor = "#FFFFFF";
+        }
+
+        [TestMethod]
+        public void ZoneInActiveColorShouldSetColorValue2WhiteWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.AreEqual("#FFFFFF", snd.Powertoys.FancyZones.Properties.FancyzonesInActiveColor.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.AreEqual(ConfigDefaults.DefaultFancyZonesInActiveColor, viewModel.ZoneInActiveColor);
+
+            // act
+            viewModel.ZoneInActiveColor = "#FFFFFF";
+        }
+
+        [TestMethod]
+        public void ExcludedAppsShouldSetColorValue2WhiteWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.AreEqual("Sample", snd.Powertoys.FancyZones.Properties.FancyzonesExcludedApps.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.AreEqual(string.Empty, viewModel.ExcludedApps);
+
+            // act
+            viewModel.ExcludedApps = "Sample";
+        }
+
+        [TestMethod]
+        public void HighlightOpacityShouldSetOpacityValueTo60WhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                FancyZonesSettingsIPCMessage snd = JsonSerializer.Deserialize<FancyZonesSettingsIPCMessage>(msg);
+                Assert.AreEqual(60, snd.Powertoys.FancyZones.Properties.FancyzonesHighlightOpacity.Value);
+                return 0;
+            };
+
+            // arrange
+            FancyZonesViewModel viewModel = new FancyZonesViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<FancyZonesSettings>.GetInstance(mockFancyZonesSettingsUtils.Object), sendMockIPCConfigMSG, FancyZonesTestFolderName);
+            Assert.AreEqual(50, viewModel.HighlightOpacity);
+
+            // act
+            viewModel.HighlightOpacity = 60;
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/General.cs

@@ -0,0 +1,254 @@
+// 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;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+using JsonSerializer = System.Text.Json.JsonSerializer;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class General
+    {
+        public const string GeneralSettingsFileName = "Test\\GeneralSettings";
+
+        private Mock<ISettingsUtils> mockGeneralSettingsUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+        }
+
+        [TestMethod]
+        [DataRow("v0.18.2")]
+        [DataRow("v0.19.2")]
+        [DataRow("v0.20.1")]
+        [DataRow("v0.21.1")]
+        [DataRow("v0.22.0")]
+        public void OriginalFilesModificationTest(string version)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+            var fileMock = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+
+            var mockGeneralSettingsUtils = new SettingsUtils(fileMock.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Initialise View Model with test Config files
+            // Arrange
+            Func<string, int> sendMockIPCConfigMSG = msg => 0;
+            Func<string, int> sendRestartAdminIPCMessage = msg => 0;
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => 0;
+            var viewModel = new GeneralViewModel(
+                settingsRepository: generalSettingsRepository,
+                runAsAdminText: "GeneralSettings_RunningAsAdminText",
+                runAsUserText: "GeneralSettings_RunningAsUserText",
+                isElevated: false,
+                isAdmin: false,
+                updateTheme: UpdateUIThemeMethod,
+                ipcMSGCallBackFunc: sendMockIPCConfigMSG,
+                ipcMSGRestartAsAdminMSGCallBackFunc: sendRestartAdminIPCMessage,
+                ipcMSGCheckForUpdatesCallBackFunc: sendCheckForUpdatesIPCMessage,
+                configFileSubfolder: string.Empty);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.AutoDownloadUpdates, viewModel.AutoDownloadUpdates);
+            Assert.AreEqual(originalGeneralSettings.Packaged, viewModel.Packaged);
+            Assert.AreEqual(originalGeneralSettings.PowertoysVersion, viewModel.PowerToysVersion);
+            Assert.AreEqual(originalGeneralSettings.RunElevated, viewModel.RunElevated);
+            Assert.AreEqual(originalGeneralSettings.Startup, viewModel.Startup);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(fileMock, expectedCallCount);
+        }
+
+        [TestMethod]
+        public void IsElevatedShouldUpdateRunasAdminStatusAttrsWhenSuccessful()
+        {
+            // Arrange
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            Func<string, int> sendRestartAdminIPCMessage = msg => { return 0; };
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => { return 0; };
+            GeneralViewModel viewModel = new GeneralViewModel(
+                settingsRepository: SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object),
+                "GeneralSettings_RunningAsAdminText",
+                "GeneralSettings_RunningAsUserText",
+                false,
+                false,
+                UpdateUIThemeMethod,
+                sendMockIPCConfigMSG,
+                sendRestartAdminIPCMessage,
+                sendCheckForUpdatesIPCMessage,
+                GeneralSettingsFileName);
+
+            Assert.AreEqual(viewModel.RunningAsUserDefaultText, viewModel.RunningAsText);
+            Assert.IsFalse(viewModel.IsElevated);
+
+            // Act
+            viewModel.IsElevated = true;
+
+            // Assert
+            Assert.AreEqual(viewModel.RunningAsAdminDefaultText, viewModel.RunningAsText);
+            Assert.IsTrue(viewModel.IsElevated);
+        }
+
+        [TestMethod]
+        public void StartupShouldEnableRunOnStartUpWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsTrue(snd.GeneralSettings.Startup);
+                return 0;
+            };
+
+            // Arrange
+            Func<string, int> sendRestartAdminIPCMessage = msg => { return 0; };
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => { return 0; };
+            GeneralViewModel viewModel = new GeneralViewModel(
+                settingsRepository: SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object),
+                "GeneralSettings_RunningAsAdminText",
+                "GeneralSettings_RunningAsUserText",
+                false,
+                false,
+                UpdateUIThemeMethod,
+                sendMockIPCConfigMSG,
+                sendRestartAdminIPCMessage,
+                sendCheckForUpdatesIPCMessage,
+                GeneralSettingsFileName);
+            Assert.IsFalse(viewModel.Startup);
+
+            // act
+            viewModel.Startup = true;
+        }
+
+        [TestMethod]
+        public void RunElevatedShouldEnableAlwaysRunElevatedWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsTrue(snd.GeneralSettings.RunElevated);
+                return 0;
+            };
+
+            Func<string, int> sendRestartAdminIPCMessage = msg => { return 0; };
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => { return 0; };
+
+            // Arrange
+            GeneralViewModel viewModel = new GeneralViewModel(
+                settingsRepository: SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object),
+                "GeneralSettings_RunningAsAdminText",
+                "GeneralSettings_RunningAsUserText",
+                false,
+                false,
+                UpdateUIThemeMethod,
+                sendMockIPCConfigMSG,
+                sendRestartAdminIPCMessage,
+                sendCheckForUpdatesIPCMessage,
+                GeneralSettingsFileName);
+
+            Assert.IsFalse(viewModel.RunElevated);
+
+            // act
+            viewModel.RunElevated = true;
+        }
+
+        [TestMethod]
+        public void IsLightThemeRadioButtonCheckedShouldThemeToLightWhenSuccessful()
+        {
+            // Arrange
+            GeneralViewModel viewModel = null;
+
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.AreEqual("light", snd.GeneralSettings.Theme);
+                return 0;
+            };
+
+            Func<string, int> sendRestartAdminIPCMessage = msg => { return 0; };
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => { return 0; };
+            viewModel = new GeneralViewModel(
+                settingsRepository: SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object),
+                "GeneralSettings_RunningAsAdminText",
+                "GeneralSettings_RunningAsUserText",
+                false,
+                false,
+                UpdateUIThemeMethod,
+                sendMockIPCConfigMSG,
+                sendRestartAdminIPCMessage,
+                sendCheckForUpdatesIPCMessage,
+                GeneralSettingsFileName);
+            Assert.IsFalse(viewModel.IsLightThemeRadioButtonChecked);
+
+            // act
+            viewModel.IsLightThemeRadioButtonChecked = true;
+        }
+
+        [TestMethod]
+        public void IsDarkThemeRadioButtonCheckedShouldThemeToDarkWhenSuccessful()
+        {
+            // Arrange
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.AreEqual("dark", snd.GeneralSettings.Theme);
+                return 0;
+            };
+
+            Func<string, int> sendRestartAdminIPCMessage = msg => { return 0; };
+            Func<string, int> sendCheckForUpdatesIPCMessage = msg => { return 0; };
+            GeneralViewModel viewModel = new GeneralViewModel(
+                settingsRepository: SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object),
+                "GeneralSettings_RunningAsAdminText",
+                "GeneralSettings_RunningAsUserText",
+                false,
+                false,
+                UpdateUIThemeMethod,
+                sendMockIPCConfigMSG,
+                sendRestartAdminIPCMessage,
+                sendCheckForUpdatesIPCMessage,
+                GeneralSettingsFileName);
+            Assert.IsFalse(viewModel.IsDarkThemeRadioButtonChecked);
+
+            // act
+            viewModel.IsDarkThemeRadioButtonChecked = true;
+        }
+
+        [TestMethod]
+        public void AllModulesAreEnabledByDefault()
+        {
+            // arrange
+            EnabledModules modules = new EnabledModules();
+
+            // Assert
+            Assert.IsTrue(modules.FancyZones);
+            Assert.IsTrue(modules.ImageResizer);
+            Assert.IsTrue(modules.FileExplorerPreview);
+            Assert.IsTrue(modules.ShortcutGuide);
+            Assert.IsTrue(modules.PowerRename);
+            Assert.IsTrue(modules.KeyboardManager);
+            Assert.IsTrue(modules.PowerLauncher);
+            Assert.IsTrue(modules.ColorPicker);
+        }
+
+        public static int UpdateUIThemeMethod(string themeName)
+        {
+            return 0;
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/ImageResizer.cs

@@ -0,0 +1,274 @@
+// 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;
+using System.IO.Abstractions.TestingHelpers;
+using System.Linq;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class ImageResizer
+    {
+        private Mock<ISettingsUtils> _mockGeneralSettingsUtils;
+
+        private Mock<ISettingsUtils> _mockImgResizerSettingsUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            _mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+            _mockImgResizerSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ImageResizerSettings>();
+        }
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "settings.json")]
+        [DataRow("v0.19.2", "settings.json")]
+        [DataRow("v0.20.1", "settings.json")]
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+
+            var fileMock = BackCompatTestProperties.GetModuleIOProvider(version, ImageResizerSettings.ModuleName, fileName);
+            var mockSettingsUtils = new SettingsUtils(fileMock.Object, settingPathMock.Object);
+
+            ImageResizerSettings originalSettings = mockSettingsUtils.GetSettings<ImageResizerSettings>(ImageResizerSettings.ModuleName);
+
+            var mockGeneralFileMock = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralFileMock.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Initialise View Model with test Config files
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, generalSettingsRepository, sendMockIPCConfigMSG);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.Enabled.ImageResizer, viewModel.IsEnabled);
+            Assert.AreEqual(ImageResizerViewModel.GetEncoderIndex(originalSettings.Properties.ImageresizerFallbackEncoder.Value), viewModel.Encoder);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerFileName.Value, viewModel.FileName);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerJpegQualityLevel.Value, viewModel.JPEGQualityLevel);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerKeepDateModified.Value, viewModel.KeepDateModified);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerPngInterlaceOption.Value, viewModel.PngInterlaceOption);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerSizes.Value.Count, viewModel.Sizes.Count);
+            Assert.AreEqual(originalSettings.Properties.ImageresizerTiffCompressOption.Value, viewModel.TiffCompressOption);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(fileMock, ImageResizerSettings.ModuleName, expectedCallCount);
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralFileMock, expectedCallCount);
+        }
+
+        [TestMethod]
+        public void IsEnabledShouldEnableModuleWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsTrue(snd.GeneralSettings.Enabled.ImageResizer);
+                return 0;
+            };
+
+            // arrange
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(_mockImgResizerSettingsUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.IsEnabled = true;
+        }
+
+        [TestMethod]
+        public void JPEGQualityLevelShouldSetValueToTenWhenSuccessful()
+        {
+            // arrange
+            var fileSystemMock = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(fileSystemMock);
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.JPEGQualityLevel = 10;
+
+            // Assert
+            viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            Assert.AreEqual(10, viewModel.JPEGQualityLevel);
+        }
+
+        [TestMethod]
+        public void PngInterlaceOptionShouldSetValueToTenWhenSuccessful()
+        {
+            // arrange
+            var fileSystemMock = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(fileSystemMock);
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.PngInterlaceOption = 10;
+
+            // Assert
+            viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            Assert.AreEqual(10, viewModel.PngInterlaceOption);
+        }
+
+        [TestMethod]
+        public void TiffCompressOptionShouldSetValueToTenWhenSuccessful()
+        {
+            // arrange
+            var fileSystemMock = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(fileSystemMock);
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.TiffCompressOption = 10;
+
+            // Assert
+            viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            Assert.AreEqual(10, viewModel.TiffCompressOption);
+        }
+
+        [TestMethod]
+        public void FileNameShouldUpdateValueWhenSuccessful()
+        {
+            // arrange
+            var fileSystemMock = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(fileSystemMock);
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            string expectedValue = "%1 (%3)";
+
+            // act
+            viewModel.FileName = expectedValue;
+
+            // Assert
+            viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            Assert.AreEqual(expectedValue, viewModel.FileName);
+        }
+
+        [TestMethod]
+        public void KeepDateModifiedShouldUpdateValueWhenSuccessful()
+        {
+            // arrange
+            var settingUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ImageResizerSettings>();
+
+            var expectedSettingsString = new ImageResizerSettings() { Properties = new ImageResizerProperties() { ImageresizerKeepDateModified = new BoolProperty() { Value = true } } }.ToJsonString();
+
+            // Using Ordinal since this is used internally
+            settingUtils.Setup(x => x.SaveSettings(
+                                        It.Is<string>(content => content.Equals(expectedSettingsString, StringComparison.Ordinal)),
+                                        It.Is<string>(module => module.Equals(ImageResizerSettings.ModuleName, StringComparison.Ordinal)),
+                                        It.IsAny<string>()))
+                                     .Verifiable();
+
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(settingUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.KeepDateModified = true;
+
+            // Assert
+            settingUtils.Verify();
+        }
+
+        [TestMethod]
+        public void EncoderShouldUpdateValueWhenSuccessful()
+        {
+            // arrange
+            var fileSystemMock = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(fileSystemMock);
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+
+            // act
+            viewModel.Encoder = 3;
+
+            // Assert
+            viewModel = new ImageResizerViewModel(mockSettingsUtils, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            Assert.AreEqual("163bcc30-e2e9-4f0b-961d-a3e9fdb788a3", viewModel.EncoderGuid);
+            Assert.AreEqual(3, viewModel.Encoder);
+        }
+
+        [TestMethod]
+        public void AddRowShouldAddEmptyImageSizeWhenSuccessful()
+        {
+            // arrange
+            var mockSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ImageResizerSettings>();
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            int sizeOfOriginalArray = viewModel.Sizes.Count;
+
+            // act
+            viewModel.AddRow();
+
+            // Assert
+            Assert.AreEqual(sizeOfOriginalArray + 1, viewModel.Sizes.Count);
+        }
+
+        [TestMethod]
+        public void DeleteImageSizeShouldDeleteImageSizeWhenSuccessful()
+        {
+            // arrange
+            var mockSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ImageResizerSettings>();
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ImageResizerViewModel viewModel = new ImageResizerViewModel(mockSettingsUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(_mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG);
+            int sizeOfOriginalArray = viewModel.Sizes.Count;
+            ImageSize deleteCandidate = viewModel.Sizes.Where<ImageSize>(x => x.Id == 0).First();
+
+            // act
+            viewModel.DeleteImageSize(0);
+
+            // Assert
+            Assert.AreEqual(sizeOfOriginalArray - 1, viewModel.Sizes.Count);
+            Assert.IsFalse(viewModel.Sizes.Contains(deleteCandidate));
+        }
+
+        [TestMethod]
+        public void UpdateWidthAndHeightShouldUpdateSizeWhenCorrectValuesAreProvided()
+        {
+            // arrange
+            ImageSize imageSize = new ImageSize()
+            {
+                Id = 0,
+                Name = "Test",
+                Fit = (int)ResizeFit.Fit,
+                Width = 30,
+                Height = 30,
+                Unit = (int)ResizeUnit.Pixel,
+            };
+
+            double negativeWidth = -2.0;
+            double negativeHeight = -2.0;
+
+            // Act
+            imageSize.Width = negativeWidth;
+            imageSize.Height = negativeHeight;
+
+            // Assert
+            Assert.AreEqual(0, imageSize.Width);
+            Assert.AreEqual(0, imageSize.Height);
+
+            // Act
+            imageSize.Width = 50;
+            imageSize.Height = 50;
+
+            // Assert
+            Assert.AreEqual(50, imageSize.Width);
+            Assert.AreEqual(50, imageSize.Height);
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/KeyboardManager.cs

@@ -0,0 +1,197 @@
+// 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.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class KeyboardManager
+    {
+        public const string Module = KeyboardManagerSettings.ModuleName;
+
+        [TestInitialize]
+        public void Setup()
+        {
+        }
+
+        [TestCleanup]
+        public void CleanUp()
+        {
+        }
+
+        [TestMethod]
+        public void CombineShortcutListsShouldReturnEmptyListWhenBothArgumentsAreEmptyLists()
+        {
+            // 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 CombineShortcutListsShouldReturnEmptyListWhenBothArgumentsAreNull()
+        {
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(null, null);
+
+            // Assert
+            var expectedResult = new List<AppSpecificKeysDataModel>();
+
+            Assert.AreEqual(expectedResult.Count, result.Count);
+        }
+
+        [TestMethod]
+        public void CombineShortcutListsShouldReturnListWithOneAppSpecificEntryWhenFirstArgumentIsNullAndSecondArgumentHasOneEntry()
+        {
+            // arrange
+            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(null, 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 CombineShortcutListsShouldReturnListWithOneAllAppsEntryWhenFirstArgumentHasOneEntryAndSecondArgumentIsNull()
+        {
+            // arrange
+            var firstList = new List<KeysDataModel>();
+            var entry = new KeysDataModel();
+            entry.OriginalKeys = "17;65";
+            entry.NewRemapKeys = "17;86";
+            firstList.Add(entry);
+
+            // act
+            var result = KeyboardManagerViewModel.CombineShortcutLists(firstList, null);
+
+            // 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);
+
+            Assert.AreEqual(expectedResult.Count, result.Count);
+            Assert.IsTrue(expectedResult[0].Compare(result[0]));
+        }
+
+        [TestMethod]
+        public void CombineShortcutListsShouldReturnListWithOneAllAppsEntryWhenFirstArgumentHasOneEntryAndSecondArgumentIsEmpty()
+        {
+            // 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 CombineShortcutListsShouldReturnListWithOneAppSpecificEntryWhenFirstArgumentIsEmptyAndSecondArgumentHasOneEntry()
+        {
+            // 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 CombineShortcutListsShouldReturnListWithOneAllAppsEntryAndOneAppSpecificEntryWhenFirstArgumentHasOneEntryAndSecondArgumentHasOneEntry()
+        {
+            // 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]));
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/PowerLauncherViewModelTest.cs

@@ -0,0 +1,188 @@
+// 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;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class PowerLauncherViewModelTest
+    {
+        private class SendCallbackMock
+        {
+            public int TimesSent { get; set; }
+
+            // PowerLauncherSettings is unused, but required according to SendCallback's signature.
+            // Naming parameter with discard symbol to suppress FxCop warnings.
+            [System.Diagnostics.CodeAnalysis.SuppressMessage("StyleCop.CSharp.NamingRules", "SA1313:Parameter names should begin with lower-case letter", Justification = "We actually don't validate setting, just calculate it was sent")]
+            public void OnSend(PowerLauncherSettings _)
+            {
+                TimesSent++;
+            }
+        }
+
+        private PowerLauncherViewModel viewModel;
+        private PowerLauncherSettings mockSettings;
+        private SendCallbackMock sendCallbackMock;
+
+        [TestInitialize]
+        public void Initialize()
+        {
+            mockSettings = new PowerLauncherSettings();
+            sendCallbackMock = new SendCallbackMock();
+            viewModel = new PowerLauncherViewModel(
+                mockSettings,
+                new PowerLauncherViewModel.SendCallback(sendCallbackMock.OnSend));
+        }
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "settings.json")]
+        [DataRow("v0.19.2", "settings.json")]
+        [DataRow("v0.20.1", "settings.json")]
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+
+            var mockIOProvider = BackCompatTestProperties.GetModuleIOProvider(version, PowerLauncherSettings.ModuleName, fileName);
+            var mockSettingsUtils = new SettingsUtils(mockIOProvider.Object, settingPathMock.Object);
+            PowerLauncherSettings originalSettings = mockSettingsUtils.GetSettings<PowerLauncherSettings>(PowerLauncherSettings.ModuleName);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Initialise View Model with test Config files
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerLauncherViewModel viewModel = new PowerLauncherViewModel(mockSettingsUtils, generalSettingsRepository, sendMockIPCConfigMSG, 32);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.Enabled.PowerLauncher, viewModel.EnablePowerLauncher);
+            Assert.AreEqual(originalSettings.Properties.ClearInputOnLaunch, viewModel.ClearInputOnLaunch);
+            Assert.AreEqual(originalSettings.Properties.CopyPathLocation.ToString(), viewModel.CopyPathLocation.ToString());
+            Assert.AreEqual(originalSettings.Properties.DisableDriveDetectionWarning, viewModel.DisableDriveDetectionWarning);
+            Assert.AreEqual(originalSettings.Properties.IgnoreHotkeysInFullscreen, viewModel.IgnoreHotkeysInFullScreen);
+            Assert.AreEqual(originalSettings.Properties.MaximumNumberOfResults, viewModel.MaximumNumberOfResults);
+            Assert.AreEqual(originalSettings.Properties.OpenPowerLauncher.ToString(), viewModel.OpenPowerLauncher.ToString());
+            Assert.AreEqual(originalSettings.Properties.OverrideWinkeyR, viewModel.OverrideWinRKey);
+            Assert.AreEqual(originalSettings.Properties.OverrideWinkeyS, viewModel.OverrideWinSKey);
+            Assert.AreEqual(originalSettings.Properties.SearchResultPreference, viewModel.SearchResultPreference);
+            Assert.AreEqual(originalSettings.Properties.SearchTypePreference, viewModel.SearchTypePreference);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(mockIOProvider, PowerLauncherSettings.ModuleName, expectedCallCount);
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralIOProvider, expectedCallCount);
+        }
+
+        [TestMethod]
+        public void SearchPreferenceShouldUpdatePreferences()
+        {
+            viewModel.SearchResultPreference = "SearchOptionsAreNotValidated";
+            viewModel.SearchTypePreference = "SearchOptionsAreNotValidated";
+
+            Assert.AreEqual(sendCallbackMock.TimesSent, 2);
+            Assert.IsTrue(mockSettings.Properties.SearchResultPreference == "SearchOptionsAreNotValidated");
+            Assert.IsTrue(mockSettings.Properties.SearchTypePreference == "SearchOptionsAreNotValidated");
+        }
+
+        public static void AssertHotkeySettings(HotkeySettings setting, bool win, bool ctrl, bool alt, bool shift, int code)
+        {
+            if (setting != null)
+            {
+                Assert.AreEqual(win, setting.Win);
+                Assert.AreEqual(ctrl, setting.Ctrl);
+                Assert.AreEqual(alt, setting.Alt);
+                Assert.AreEqual(shift, setting.Shift);
+                Assert.AreEqual(code, setting.Code);
+            }
+            else
+            {
+                Assert.Fail("setting parameter is null");
+            }
+        }
+
+        [TestMethod]
+        public void HotkeysShouldUpdateHotkeys()
+        {
+            var openPowerLauncher = new HotkeySettings();
+            openPowerLauncher.Win = true;
+            openPowerLauncher.Code = 83;
+
+            var openFileLocation = new HotkeySettings();
+            openFileLocation.Ctrl = true;
+            openFileLocation.Code = 65;
+
+            var openConsole = new HotkeySettings();
+            openConsole.Alt = true;
+            openConsole.Code = 68;
+
+            var copyFileLocation = new HotkeySettings();
+            copyFileLocation.Shift = true;
+            copyFileLocation.Code = 70;
+
+            viewModel.OpenPowerLauncher = openPowerLauncher;
+            viewModel.OpenFileLocation = openFileLocation;
+            viewModel.CopyPathLocation = copyFileLocation;
+
+            Assert.AreEqual(3, sendCallbackMock.TimesSent);
+
+            AssertHotkeySettings(
+                mockSettings.Properties.OpenPowerLauncher,
+                true,
+                false,
+                false,
+                false,
+                83);
+            AssertHotkeySettings(
+                mockSettings.Properties.OpenFileLocation,
+                false,
+                true,
+                false,
+                false,
+                65);
+            AssertHotkeySettings(
+                mockSettings.Properties.CopyPathLocation,
+                false,
+                false,
+                false,
+                true,
+                70);
+        }
+
+        [TestMethod]
+        public void OverrideShouldUpdateOverrides()
+        {
+            viewModel.OverrideWinRKey = true;
+            viewModel.OverrideWinSKey = false;
+
+            Assert.AreEqual(1, sendCallbackMock.TimesSent);
+
+            Assert.IsTrue(mockSettings.Properties.OverrideWinkeyR);
+            Assert.IsFalse(mockSettings.Properties.OverrideWinkeyS);
+        }
+
+        [TestMethod]
+        public void DriveDetectionViewModelWhenSetMustUpdateOverrides()
+        {
+            // Act
+            viewModel.DisableDriveDetectionWarning = true;
+
+            // Assert
+            Assert.AreEqual(1, sendCallbackMock.TimesSent);
+            Assert.IsTrue(mockSettings.Properties.DisableDriveDetectionWarning);
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/PowerPreview.cs

@@ -0,0 +1,122 @@
+// 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;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class PowerPreview
+    {
+        private Mock<ISettingsUtils> mockPowerPreviewSettingsUtils;
+
+        private Mock<ISettingsUtils> mockGeneralSettingsUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            mockPowerPreviewSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<PowerPreviewSettings>();
+            mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+        }
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "settings.json")]
+        [DataRow("v0.19.2", "settings.json")]
+        [DataRow("v0.20.1", "settings.json")]
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+            var fileMock = BackCompatTestProperties.GetModuleIOProvider(version, PowerPreviewSettings.ModuleName, fileName);
+
+            var mockSettingsUtils = new SettingsUtils(fileMock.Object, settingPathMock.Object);
+            PowerPreviewSettings originalSettings = mockSettingsUtils.GetSettings<PowerPreviewSettings>(PowerPreviewSettings.ModuleName);
+            var repository = new BackCompatTestProperties.MockSettingsRepository<PowerPreviewSettings>(mockSettingsUtils);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Initialise View Model with test Config files
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerPreviewViewModel viewModel = new PowerPreviewViewModel(repository, generalSettingsRepository, sendMockIPCConfigMSG);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.IsElevated, viewModel.IsElevated);
+            Assert.AreEqual(originalSettings.Properties.EnableMdPreview, viewModel.MDRenderIsEnabled);
+            Assert.AreEqual(originalSettings.Properties.EnableSvgPreview, viewModel.SVGRenderIsEnabled);
+            Assert.AreEqual(originalSettings.Properties.EnableSvgThumbnail, viewModel.SVGThumbnailIsEnabled);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(fileMock, PowerPreviewSettings.ModuleName, expectedCallCount);
+        }
+
+        [TestMethod]
+        public void SVGRenderIsEnabledShouldPrevHandlerWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                SndModuleSettings<SndPowerPreviewSettings> snd = JsonSerializer.Deserialize<SndModuleSettings<SndPowerPreviewSettings>>(msg);
+                Assert.IsTrue(snd.PowertoysSetting.FileExplorerPreviewSettings.Properties.EnableSvgPreview);
+                return 0;
+            };
+
+            // arrange
+            PowerPreviewViewModel viewModel = new PowerPreviewViewModel(SettingsRepository<PowerPreviewSettings>.GetInstance(mockPowerPreviewSettingsUtils.Object), SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, PowerPreviewSettings.ModuleName);
+
+            // act
+            viewModel.SVGRenderIsEnabled = true;
+        }
+
+        [TestMethod]
+        public void SVGThumbnailIsEnabledShouldPrevHandlerWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                SndModuleSettings<SndPowerPreviewSettings> snd = JsonSerializer.Deserialize<SndModuleSettings<SndPowerPreviewSettings>>(msg);
+                Assert.IsTrue(snd.PowertoysSetting.FileExplorerPreviewSettings.Properties.EnableSvgThumbnail);
+                return 0;
+            };
+
+            // arrange
+            PowerPreviewViewModel viewModel = new PowerPreviewViewModel(SettingsRepository<PowerPreviewSettings>.GetInstance(mockPowerPreviewSettingsUtils.Object), SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, PowerPreviewSettings.ModuleName);
+
+            // act
+            viewModel.SVGThumbnailIsEnabled = true;
+        }
+
+        [TestMethod]
+        public void MDRenderIsEnabledShouldPrevHandlerWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                SndModuleSettings<SndPowerPreviewSettings> snd = JsonSerializer.Deserialize<SndModuleSettings<SndPowerPreviewSettings>>(msg);
+                Assert.IsTrue(snd.PowertoysSetting.FileExplorerPreviewSettings.Properties.EnableMdPreview);
+                return 0;
+            };
+
+            // arrange
+            PowerPreviewViewModel viewModel = new PowerPreviewViewModel(SettingsRepository<PowerPreviewSettings>.GetInstance(mockPowerPreviewSettingsUtils.Object), SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, PowerPreviewSettings.ModuleName);
+
+            // act
+            viewModel.MDRenderIsEnabled = true;
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/PowerRename.cs

@@ -0,0 +1,226 @@
+// 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;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class PowerRename
+    {
+        public const string GeneralSettingsFileName = "Test\\PowerRename";
+
+        private Mock<ISettingsUtils> mockGeneralSettingsUtils;
+
+        private Mock<ISettingsUtils> mockPowerRenamePropertiesUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+            mockPowerRenamePropertiesUtils = ISettingsUtilsMocks.GetStubSettingsUtils<PowerRenameLocalProperties>();
+        }
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "power-rename-settings.json")]
+        [DataRow("v0.19.2", "power-rename-settings.json")]
+        [DataRow("v0.20.1", "power-rename-settings.json")]
+        [DataRow("v0.22.0", "power-rename-settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+            var mockIOProvider = BackCompatTestProperties.GetModuleIOProvider(version, PowerRenameSettings.ModuleName, fileName);
+
+            var mockSettingsUtils = new SettingsUtils(mockIOProvider.Object, settingPathMock.Object);
+            PowerRenameLocalProperties originalSettings = mockSettingsUtils.GetSettings<PowerRenameLocalProperties>(PowerRenameSettings.ModuleName);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+
+            // Initialise View Model with test Config files
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockSettingsUtils, generalSettingsRepository, sendMockIPCConfigMSG);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.Enabled.PowerRename, viewModel.IsEnabled);
+            Assert.AreEqual(originalSettings.ExtendedContextMenuOnly, viewModel.EnabledOnContextExtendedMenu);
+            Assert.AreEqual(originalSettings.MRUEnabled, viewModel.MRUEnabled);
+            Assert.AreEqual(originalSettings.ShowIcon, viewModel.EnabledOnContextMenu);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(mockIOProvider, PowerRenameSettings.ModuleName, expectedCallCount);
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralIOProvider, expectedCallCount);
+        }
+
+        [TestMethod]
+        public void IsEnabledShouldEnableModuleWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsTrue(snd.GeneralSettings.Enabled.PowerRename);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.IsEnabled = true;
+        }
+
+        [TestMethod]
+        public void MRUEnabledShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                PowerRenameSettingsIPCMessage snd = JsonSerializer.Deserialize<PowerRenameSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.PowerRename.Properties.MRUEnabled.Value);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.MRUEnabled = true;
+        }
+
+        [TestMethod]
+        public void WhenIsEnabledIsOffAndMRUEnabledIsOffGlobalAndMruShouldBeOff()
+        {
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            viewModel.IsEnabled = false;
+            viewModel.MRUEnabled = false;
+
+            Assert.IsFalse(viewModel.GlobalAndMruEnabled);
+        }
+
+        [TestMethod]
+        public void WhenIsEnabledIsOffAndMRUEnabledIsOnGlobalAndMruShouldBeOff()
+        {
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            viewModel.IsEnabled = false;
+            viewModel.MRUEnabled = true;
+
+            Assert.IsFalse(viewModel.GlobalAndMruEnabled);
+        }
+
+        [TestMethod]
+        public void WhenIsEnabledIsOnAndMRUEnabledIsOffGlobalAndMruShouldBeOff()
+        {
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            viewModel.IsEnabled = true;
+            viewModel.MRUEnabled = false;
+
+            Assert.IsFalse(viewModel.GlobalAndMruEnabled);
+        }
+
+        [TestMethod]
+        public void WhenIsEnabledIsOnAndMRUEnabledIsOnGlobalAndMruShouldBeOn()
+        {
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            viewModel.IsEnabled = true;
+            viewModel.MRUEnabled = true;
+
+            Assert.IsTrue(viewModel.GlobalAndMruEnabled);
+        }
+
+        [TestMethod]
+        public void EnabledOnContextMenuShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                PowerRenameSettingsIPCMessage snd = JsonSerializer.Deserialize<PowerRenameSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.PowerRename.Properties.ShowIcon.Value);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.EnabledOnContextMenu = true;
+        }
+
+        [TestMethod]
+        public void EnabledOnContextExtendedMenuShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                PowerRenameSettingsIPCMessage snd = JsonSerializer.Deserialize<PowerRenameSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.PowerRename.Properties.ShowIcon.Value);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.EnabledOnContextMenu = true;
+        }
+
+        [TestMethod]
+        public void RestoreFlagsOnLaunchShouldSetValue2TrueWhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                PowerRenameSettingsIPCMessage snd = JsonSerializer.Deserialize<PowerRenameSettingsIPCMessage>(msg);
+                Assert.IsTrue(snd.Powertoys.PowerRename.Properties.PersistState.Value);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.RestoreFlagsOnLaunch = true;
+        }
+
+        [TestMethod]
+        public void MaxDispListNumShouldSetMaxSuggListTo20WhenSuccessful()
+        {
+            // Assert
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                PowerRenameSettingsIPCMessage snd = JsonSerializer.Deserialize<PowerRenameSettingsIPCMessage>(msg);
+                Assert.AreEqual(20, snd.Powertoys.PowerRename.Properties.MaxMRUSize.Value);
+                return 0;
+            };
+
+            // arrange
+            PowerRenameViewModel viewModel = new PowerRenameViewModel(mockPowerRenamePropertiesUtils.Object, SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), sendMockIPCConfigMSG, GeneralSettingsFileName);
+
+            // act
+            viewModel.MaxDispListNum = 20;
+        }
+    }
+}

src/settings-ui/Microsoft.PowerToys.Settings.UI.UnitTests/ViewModelTests/ShortcutGuide.cs

@@ -0,0 +1,152 @@
+// 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;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
+using Microsoft.PowerToys.Settings.UI.UnitTests.BackwardsCompatibility;
+using Microsoft.PowerToys.Settings.UI.UnitTests.Mocks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class ShortcutGuide
+    {
+        public const string ShortCutGuideTestFolderName = "Test\\ShortCutGuide";
+
+        /// <summary>
+        /// Test if the original settings files were modified.
+        /// </summary>
+        [TestMethod]
+        [DataRow("v0.18.2", "settings.json")]
+        [DataRow("v0.19.2", "settings.json")]
+        [DataRow("v0.20.1", "settings.json")]
+        [DataRow("v0.21.1", "settings.json")]
+        [DataRow("v0.22.0", "settings.json")]
+        public void OriginalFilesModificationTest(string version, string fileName)
+        {
+            var settingPathMock = new Mock<ISettingsPath>();
+            var mockIOProvider = BackCompatTestProperties.GetModuleIOProvider(version, ShortcutGuideSettings.ModuleName, fileName);
+            var mockSettingsUtils = new SettingsUtils(mockIOProvider.Object, settingPathMock.Object);
+            ShortcutGuideSettings originalSettings = mockSettingsUtils.GetSettings<ShortcutGuideSettings>(ShortcutGuideSettings.ModuleName);
+
+            var mockGeneralIOProvider = BackCompatTestProperties.GetGeneralSettingsIOProvider(version);
+            var mockGeneralSettingsUtils = new SettingsUtils(mockGeneralIOProvider.Object, settingPathMock.Object);
+            GeneralSettings originalGeneralSettings = mockGeneralSettingsUtils.GetSettings<GeneralSettings>();
+            var generalSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<GeneralSettings>(mockGeneralSettingsUtils);
+            var shortcutSettingsRepository = new BackCompatTestProperties.MockSettingsRepository<ShortcutGuideSettings>(mockSettingsUtils);
+
+            // Initialise View Model with test Config files
+            Func<string, int> sendMockIPCConfigMSG = msg => { return 0; };
+            ShortcutGuideViewModel viewModel = new ShortcutGuideViewModel(generalSettingsRepository, shortcutSettingsRepository, sendMockIPCConfigMSG);
+
+            // Verify that the old settings persisted
+            Assert.AreEqual(originalGeneralSettings.Enabled.ShortcutGuide, viewModel.IsEnabled);
+            Assert.AreEqual(originalSettings.Properties.OverlayOpacity.Value, viewModel.OverlayOpacity);
+            Assert.AreEqual(originalSettings.Properties.PressTime.Value, viewModel.PressTime);
+
+            // Verify that the stub file was used
+            var expectedCallCount = 2;  // once via the view model, and once by the test (GetSettings<T>)
+            BackCompatTestProperties.VerifyModuleIOProviderWasRead(mockIOProvider, ShortcutGuideSettings.ModuleName, expectedCallCount);
+            BackCompatTestProperties.VerifyGeneralSettingsIOProviderWasRead(mockGeneralIOProvider, expectedCallCount);
+        }
+
+        private Mock<ISettingsUtils> mockGeneralSettingsUtils;
+
+        private Mock<ISettingsUtils> mockShortcutGuideSettingsUtils;
+
+        [TestInitialize]
+        public void SetUpStubSettingUtils()
+        {
+            mockGeneralSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<GeneralSettings>();
+            mockShortcutGuideSettingsUtils = ISettingsUtilsMocks.GetStubSettingsUtils<ShortcutGuideSettings>();
+        }
+
+        [TestMethod]
+        public void IsEnabledShouldEnableModuleWhenSuccessful()
+        {
+            // Assert
+            // Initialize mock function of sending IPC message.
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+                Assert.IsTrue(snd.GeneralSettings.Enabled.ShortcutGuide);
+                return 0;
+            };
+
+            // Arrange
+            ShortcutGuideViewModel viewModel = new ShortcutGuideViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<ShortcutGuideSettings>.GetInstance(mockShortcutGuideSettingsUtils.Object), sendMockIPCConfigMSG, ShortCutGuideTestFolderName);
+
+            // Act
+            viewModel.IsEnabled = true;
+        }
+
+        [TestMethod]
+        public void ThemeIndexShouldSetThemeToDarkWhenSuccessful()
+        {
+            // Assert
+            // Initialize mock function of sending IPC message.
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                ShortcutGuideSettingsIPCMessage snd = JsonSerializer.Deserialize<ShortcutGuideSettingsIPCMessage>(msg);
+                Assert.AreEqual("dark", snd.Powertoys.ShortcutGuide.Properties.Theme.Value);
+                return 0;
+            };
+
+            // Arrange
+            ShortcutGuideViewModel viewModel = new ShortcutGuideViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<ShortcutGuideSettings>.GetInstance(mockShortcutGuideSettingsUtils.Object), sendMockIPCConfigMSG, ShortCutGuideTestFolderName);
+
+            // Initialize shortcut guide settings theme to 'system' to be in sync with shortcut_guide.h.
+            Assert.AreEqual(2, viewModel.ThemeIndex);
+
+            // Act
+            viewModel.ThemeIndex = 0;
+        }
+
+        [TestMethod]
+        public void PressTimeShouldSetPressTimeToOneHundredWhenSuccessful()
+        {
+            // Assert
+            // Initialize mock function of sending IPC message.
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                ShortcutGuideSettingsIPCMessage snd = JsonSerializer.Deserialize<ShortcutGuideSettingsIPCMessage>(msg);
+                Assert.AreEqual(100, snd.Powertoys.ShortcutGuide.Properties.PressTime.Value);
+                return 0;
+            };
+
+            // Arrange
+            ShortcutGuideViewModel viewModel = new ShortcutGuideViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<ShortcutGuideSettings>.GetInstance(mockShortcutGuideSettingsUtils.Object), sendMockIPCConfigMSG, ShortCutGuideTestFolderName);
+            Assert.AreEqual(900, viewModel.PressTime);
+
+            // Act
+            viewModel.PressTime = 100;
+        }
+
+        [TestMethod]
+        public void OverlayOpacityShouldSeOverlayOpacityToOneHundredWhenSuccessful()
+        {
+            // Assert
+            // Initialize mock function of sending IPC message.
+            Func<string, int> sendMockIPCConfigMSG = msg =>
+            {
+                ShortcutGuideSettingsIPCMessage snd = JsonSerializer.Deserialize<ShortcutGuideSettingsIPCMessage>(msg);
+
+                // Serialisation not working as expected in the test project:
+                Assert.AreEqual(100, snd.Powertoys.ShortcutGuide.Properties.OverlayOpacity.Value);
+                return 0;
+            };
+
+            // Arrange
+            ShortcutGuideViewModel viewModel = new ShortcutGuideViewModel(SettingsRepository<GeneralSettings>.GetInstance(mockGeneralSettingsUtils.Object), SettingsRepository<ShortcutGuideSettings>.GetInstance(mockShortcutGuideSettingsUtils.Object), sendMockIPCConfigMSG, ShortCutGuideTestFolderName);
+            Assert.AreEqual(90, viewModel.OverlayOpacity);
+
+            // Act
+            viewModel.OverlayOpacity = 100;
+        }
+    }
+}