Add tests for generic exception formatting

src/Tests/Spectre.Console.Tests/Data/Exceptions.cs

@@ -6,6 +6,8 @@ public static class TestExceptions
 
     public static bool GenericMethodThatThrows<T0, T1, TRet>(int? number) => throw new InvalidOperationException("Throwing!");
 
+    public static bool MethodThatThrowsGenericException<T>() => throw new GenericException<T>("Throwing!", default);
+
     public static void ThrowWithInnerException()
     {
         try
@@ -42,3 +44,6 @@ public static class TestExceptions
         return ("key", new List<T>());
     }
 }
+
+#pragma warning disable CS9113 // Parameter is unread.
+public class GenericException<T>(string message, T value) : Exception(message);

src/Tests/Spectre.Console.Tests/Expectations/Exception/GenericException.Output_exceptionFormats=Default.verified.txt

@@ -0,0 +1,4 @@
+Spectre.Console.Tests.Data.GenericException<Spectre.Console.IAnsiConsole>: Throwing!
+  at bool Spectre.Console.Tests.Data.TestExceptions.MethodThatThrowsGenericException<T>() in {ProjectDirectory}Data/Exceptions.cs:9
+  at void Spectre.Console.Tests.Unit.ExceptionTests.<>c.<Should_Write_GenericException>b__8_0() in {ProjectDirectory}Unit/ExceptionTests.cs:134
+  at Exception Spectre.Console.Tests.Unit.ExceptionTests.GetException(Action action) in {ProjectDirectory}Unit/ExceptionTests.cs:147

src/Tests/Spectre.Console.Tests/Expectations/Exception/GenericException.Output_exceptionFormats=ShortenTypes.verified.txt

@@ -0,0 +1,4 @@
+GenericException<IAnsiConsole>: Throwing!
+  at bool Spectre.Console.Tests.Data.TestExceptions.MethodThatThrowsGenericException<T>() in {ProjectDirectory}Data/Exceptions.cs:9
+  at void Spectre.Console.Tests.Unit.ExceptionTests.<>c.<Should_Write_GenericException>b__8_0() in {ProjectDirectory}Unit/ExceptionTests.cs:134
+  at Exception Spectre.Console.Tests.Unit.ExceptionTests.GetException(Action action) in {ProjectDirectory}Unit/ExceptionTests.cs:147

src/Tests/Spectre.Console.Tests/Unit/ExceptionTests.cs

@@ -123,6 +123,23 @@ public sealed class ExceptionTests
         return Verifier.Verify(result);
     }
 
+    [Theory]
+    [InlineData(ExceptionFormats.Default)]
+    [InlineData(ExceptionFormats.ShortenTypes)]
+    [Expectation("GenericException")]
+    public Task Should_Write_GenericException(ExceptionFormats exceptionFormats)
+    {
+        // Given
+        var console = new TestConsole { EmitAnsiSequences = true }.Width(1024);
+        var dex = GetException(() => TestExceptions.MethodThatThrowsGenericException<IAnsiConsole>());
+
+        // When
+        var result = console.WriteNormalizedException(dex, exceptionFormats);
+
+        // Then
+        return Verifier.Verify(result).UseParameters(exceptionFormats);
+    }
+
     public static Exception GetException(Action action)
     {
         try