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/ModelsTests/SettingsUtilsTests.cs

@@ -0,0 +1,125 @@
+// 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.Interfaces;
+using Microsoft.PowerToys.Settings.UnitTest;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace CommonLibTest
+{
+    [TestClass]
+    public class SettingsUtilsTests
+    {
+        [TestMethod]
+        public void SaveSettingsSaveSettingsToFileWhenFilePathExists()
+        {
+            // Arrange
+            var mockFileSystem = new MockFileSystem();
+            var settingsUtils = new SettingsUtils(mockFileSystem);
+
+            string file_name = "\\test";
+            string file_contents_correct_json_content = "{\"name\":\"powertoy module name\",\"version\":\"powertoy version\"}";
+
+            BasePTSettingsTest expected_json = JsonSerializer.Deserialize<BasePTSettingsTest>(file_contents_correct_json_content);
+
+            // Act
+            settingsUtils.SaveSettings(file_contents_correct_json_content, file_name);
+            BasePTSettingsTest actual_json = settingsUtils.GetSettings<BasePTSettingsTest>(file_name);
+
+            // Assert
+            Assert.AreEqual(expected_json.ToJsonString(), actual_json.ToJsonString());
+        }
+
+        [TestMethod]
+        public void SaveSettingsShouldCreateFileWhenFilePathIsNotFound()
+        {
+            // Arrange
+            var mockFileSystem = new MockFileSystem();
+            var settingsUtils = new SettingsUtils(mockFileSystem);
+            string file_name = "test\\Test Folder";
+            string file_contents_correct_json_content = "{\"name\":\"powertoy module name\",\"version\":\"powertoy version\"}";
+
+            BasePTSettingsTest expected_json = JsonSerializer.Deserialize<BasePTSettingsTest>(file_contents_correct_json_content);
+
+            settingsUtils.SaveSettings(file_contents_correct_json_content, file_name);
+            BasePTSettingsTest actual_json = settingsUtils.GetSettings<BasePTSettingsTest>(file_name);
+
+            // Assert
+            Assert.AreEqual(expected_json.ToJsonString(), actual_json.ToJsonString());
+        }
+
+        [TestMethod]
+        public void SettingsFolderExistsShouldReturnFalseWhenFilePathIsNotFound()
+        {
+            // Arrange
+            var mockFileSystem = new MockFileSystem();
+            var settingsUtils = new SettingsUtils(mockFileSystem);
+            string file_name_random = "test\\" + RandomString();
+            string file_name_exists = "test\\exists";
+            string file_contents_correct_json_content = "{\"name\":\"powertoy module name\",\"version\":\"powertoy version\"}";
+
+            // Act
+            bool pathNotFound = settingsUtils.SettingsExists(file_name_random);
+
+            settingsUtils.SaveSettings(file_contents_correct_json_content, file_name_exists);
+            bool pathFound = settingsUtils.SettingsExists(file_name_exists);
+
+            // Assert
+            Assert.IsFalse(pathNotFound);
+            Assert.IsTrue(pathFound);
+        }
+
+        [TestMethod]
+        public void SettingsUtilsMustReturnDefaultItemWhenFileIsCorrupt()
+        {
+            // Arrange
+            var mockFileSystem = new MockFileSystem();
+            var mockSettingsUtils = new SettingsUtils(mockFileSystem);
+
+            // Act
+            TestClass settings = mockSettingsUtils.GetSettings<TestClass>(string.Empty);
+
+            // Assert
+            Assert.AreEqual(settings.TestInt, 100);
+            Assert.AreEqual(settings.TestString, "test");
+        }
+
+        public static string RandomString()
+        {
+            Random random = new Random();
+            int length = 20;
+            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+
+            return new string(Enumerable.Repeat(chars, length)
+              .Select(s => s[random.Next(s.Length)]).ToArray());
+        }
+
+        private partial class TestClass : ISettingsConfig
+        {
+            public int TestInt { get; set; } = 100;
+
+            public string TestString { get; set; } = "test";
+
+            public string GetModuleName()
+            {
+                throw new NotImplementedException();
+            }
+
+            public string ToJsonString()
+            {
+                return JsonSerializer.Serialize(this);
+            }
+
+            public bool UpgradeSettingsConfiguration()
+            {
+                throw new NotImplementedException();
+            }
+        }
+    }
+}