test: add crestron mocks and Test configuration

tests/EssentialsTests/CrestronMockTest.cs

@@ -0,0 +1,86 @@
+using Crestron.SimplSharpPro;
+using Xunit;
+
+namespace EssentialsTests
+{
+  public class CrestronMockTests
+  {
+    [Fact]
+    public void CrestronControlSystem_Constructor_ShouldBuildSuccessfully()
+    {
+      // Arrange & Act
+      var exception = Record.Exception(() => new CrestronControlSystem());
+
+      // Assert
+      Assert.Null(exception);
+    }
+
+    [Fact]
+    public void CrestronControlSystem_Constructor_ShouldSetPropertiesCorrectly()
+    {
+      // Arrange & Act
+      var controlSystem = new CrestronControlSystem();
+
+      // Assert
+      Assert.NotNull(controlSystem);
+      Assert.NotNull(controlSystem.ComPorts);
+      Assert.NotNull(controlSystem.RelayPorts);
+      Assert.NotNull(controlSystem.IROutputPorts);
+      Assert.NotNull(controlSystem.DigitalInputPorts);
+      Assert.NotNull(controlSystem.IRInputPort);
+    }
+
+    [Fact]
+    public void CrestronControlSystem_InitializeSystem_ShouldNotThrow()
+    {
+      // Arrange
+      var controlSystem = new CrestronControlSystem();
+
+      // Act & Assert
+      var exception = Record.Exception(() => controlSystem.InitializeSystem());
+      Assert.Null(exception);
+    }
+
+    [Fact]
+    public void MockControlSystem_ShouldHaveRequiredStaticProperties()
+    {
+      // Act & Assert
+      Assert.NotNull(CrestronControlSystem.NullCue);
+      Assert.NotNull(CrestronControlSystem.NullBoolInputSig);
+      Assert.NotNull(CrestronControlSystem.NullBoolOutputSig);
+      Assert.NotNull(CrestronControlSystem.NullUShortInputSig);
+      Assert.NotNull(CrestronControlSystem.NullUShortOutputSig);
+      Assert.NotNull(CrestronControlSystem.NullStringInputSig);
+      Assert.NotNull(CrestronControlSystem.NullStringOutputSig);
+      Assert.NotNull(CrestronControlSystem.SigGroups);
+    }
+
+    [Fact]
+    public void MockControlSystem_ShouldCreateSigGroups()
+    {
+      // Act & Assert
+      var exception = Record.Exception(() =>
+      {
+        var sigGroup = CrestronControlSystem.CreateSigGroup(1, eSigType.Bool);
+        Assert.NotNull(sigGroup);
+      });
+
+      Assert.Null(exception);
+    }
+
+    [Fact]
+    public void MockControlSystem_VirtualMethods_ShouldNotThrow()
+    {
+      // Arrange
+      var controlSystem = new CrestronControlSystem();
+
+      // Act & Assert - just test InitializeSystem since it's definitely available
+      var exception = Record.Exception(() =>
+      {
+        controlSystem.InitializeSystem();
+      });
+
+      Assert.Null(exception);
+    }
+  }
+}