feat: Enhance device testing and environment handling with new interfaces and fakes

src/PepperDash.Core.Tests/TestInitializer.cs

@@ -0,0 +1,29 @@
+using System.Runtime.CompilerServices;
+using PepperDash.Core.Abstractions;
+using PepperDash.Core.Tests.Fakes;
+
+namespace PepperDash.Core.Tests;
+
+/// <summary>
+/// Runs once before any type in this assembly is accessed.
+/// Registers fake Crestron service implementations with <see cref="DebugServiceRegistration"/>
+/// so that the <c>Debug</c> static constructor uses them instead of the real Crestron SDK.
+/// This must remain a module initializer (not a test fixture) because the static constructor
+/// fires the first time <em>any</em> type in PepperDash.Core is referenced — before xUnit
+/// has a chance to run fixture setup code.
+/// </summary>
+internal static class TestInitializer
+{
+    [ModuleInitializer]
+    internal static void Initialize()
+    {
+        DebugServiceRegistration.Register(
+            new FakeCrestronEnvironment
+            {
+                DevicePlatform = DevicePlatform.Server, // avoids any appliance-only code paths
+                RuntimeEnvironment = RuntimeEnvironment.Other, // skips console command registration
+            },
+            new NoOpCrestronConsole(),
+            new InMemoryCrestronDataStore());
+    }
+}