SourceGen started

Assets/SourceGeneration/InfraGens~/InfraGens/InfraGens.Tests/Utils/TestAdditionalFile.cs

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+using System.Threading;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Text;
+
+namespace InfraGens.Tests.Utils;
+
+public class TestAdditionalFile : AdditionalText
+{
+    private readonly SourceText _text;
+
+    public TestAdditionalFile(string path, string text)
+    {
+        Path = path;
+        _text = SourceText.From(text);
+    }
+
+    public override SourceText GetText(CancellationToken cancellationToken = new()) => _text;
+
+    public override string Path { get; }
+}