[Settings] Migrate Color Picker Settings Tests (#5759)

* added MSTest project

* migrated color picker settings

* undo changes for the .xaml page

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

@@ -0,0 +1,63 @@
+// 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.IO;
+using System.Text.Json;
+using Microsoft.PowerToys.Settings.UI.Lib;
+using Microsoft.PowerToys.Settings.UI.Lib.ViewModels;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace ViewModelTests
+{
+    [TestClass]
+    public class ColorPicker
+    {
+        private const string ModuleName = "ColorPicker";
+
+        [TestInitialize]
+        public void Setup()
+        {
+            var generalSettings = new GeneralSettings();
+            var colorPickerSettings = new ColorPickerSettings();
+
+            SettingsUtils.SaveSettings(generalSettings.ToJsonString());
+            SettingsUtils.SaveSettings(colorPickerSettings.ToJsonString(), colorPickerSettings.Name, ModuleName + ".json");
+        }
+
+        [TestCleanup]
+        public void CleanUp()
+        {
+            string generalSettings_file_name = string.Empty;
+            if (SettingsUtils.SettingsFolderExists(generalSettings_file_name))
+            {
+                DeleteFolder(generalSettings_file_name);
+            }
+
+            if (SettingsUtils.SettingsFolderExists(ModuleName))
+            {
+                DeleteFolder(ModuleName);
+            }
+        }
+
+        [TestMethod]
+        public void ColorPickerIsEnabledByDefault()
+        {
+            var viewModel = new ColorPickerViewModel(ColorPickerIsEnabledByDefault_IPC);
+
+            Assert.IsTrue(viewModel.IsEnabled);
+        }
+
+        public int ColorPickerIsEnabledByDefault_IPC(string msg)
+        {
+            OutGoingGeneralSettings snd = JsonSerializer.Deserialize<OutGoingGeneralSettings>(msg);
+            Assert.IsTrue(snd.GeneralSettings.Enabled.ColorPicker);
+            return 0;
+        }
+
+        private static void DeleteFolder(string powertoy)
+        {
+            Directory.Delete(Path.Combine(SettingsUtils.LocalApplicationDataFolder(), $"Microsoft\\PowerToys\\{powertoy}"), true);
+        }
+    }
+}