chore: initial commit

Signed-off-by: Alan Brault <alan.brault@visus.io>

tests/MapperSourceGen.SourceGenerator.Tests/Fixture.cs

@@ -0,0 +1,39 @@
+namespace MapperSourceGen.SourceGenerator.Tests;
+
+using System.Reflection;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+
+internal static class Fixture
+{
+    private static readonly Type[] RequiredAssemblies =
+    [
+        typeof(Binder),
+        typeof(MapperAttribute)
+    ];
+
+    private static IEnumerable<MetadataReference> AssemblyReferencesForCodeGen =>
+        AppDomain.CurrentDomain
+                 .GetAssemblies()
+                 .Concat(RequiredAssemblies.Select(s => s.Assembly))
+                 .Distinct()
+                 .Where(w => !w.IsDynamic)
+                 .Select(s => MetadataReference.CreateFromFile(s.Location));
+
+    public static Task VerifyGenerateSourcesAsync(string source, params IIncrementalGenerator[] generators)
+    {
+        var syntaxTree = CSharpSyntaxTree.ParseText(source, CSharpParseOptions.Default);
+
+        var compilation = CSharpCompilation.Create(
+                                                   "compilation",
+                                                   [syntaxTree],
+                                                   AssemblyReferencesForCodeGen,
+                                                   new CSharpCompilationOptions(OutputKind.ConsoleApplication));
+
+        var driver = CSharpGeneratorDriver.Create(generators);
+        var runner = driver.RunGenerators(compilation);
+        var verify = Verify(runner);
+
+        return verify;
+    }
+}