Implement desktop sync protocol handling

WirelessTextSyncer.Windows.Tests/SyncMessageTests.cs

@@ -0,0 +1,31 @@
+using System.Text.Json;
+using WirelessTextSyncer.Windows.Models;
+
+namespace WirelessTextSyncer.Windows.Tests;
+
+[TestClass]
+public sealed class SyncMessageTests
+{
+    [TestMethod]
+    public void DeserializeAndroidInsertTextMessage()
+    {
+        var message = JsonSerializer.Deserialize<SyncMessage>(
+            """{"action":"insertText","text":"hello"}""",
+            new JsonSerializerOptions(JsonSerializerDefaults.Web));
+
+        Assert.IsNotNull(message);
+        Assert.AreEqual(SyncAction.InsertText, message.Action);
+        Assert.AreEqual("hello", message.Text);
+    }
+
+    [TestMethod]
+    public void DeserializeAndroidBackspaceMessage()
+    {
+        var message = JsonSerializer.Deserialize<SyncMessage>(
+            """{"action":"backspace"}""",
+            new JsonSerializerOptions(JsonSerializerDefaults.Web));
+
+        Assert.IsNotNull(message);
+        Assert.AreEqual(SyncAction.Backspace, message.Action);
+    }
+}

WirelessTextSyncer.Windows.Tests/WirelessTextSyncer.Windows.Tests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\WirelessTextSyncer.Windows\WirelessTextSyncer.Windows.csproj" />
+  </ItemGroup>
+
+</Project>