Added Multi line documentation test

PrimaryParameter.SG/Parameter.cs

@@ -1,3 +1,5 @@
+using System.Text;
+
 namespace PrimaryParameter.SG;
 
 record Parameter(string Namespace, ParentClass TypeName, string ParamName, string ParamType, IGeneratedMember[] FieldNames);
@@ -11,12 +13,16 @@ interface IGeneratedMember
 record GenerateSummary(IGeneratedMember Generator, string Summary) : IGeneratedMember
 {
     string IGeneratedMember.Name => Generator.Name;
-    string IGeneratedMember.GenerateMember(Parameter param) => $"""
-    /// <summary>
-    /// {Summary}
-    /// </summary>
-    {Generator.GenerateMember(param)}
-    """;
+    string IGeneratedMember.GenerateMember(Parameter param)
+    {
+        var sb = new StringBuilder()
+        .AppendLine("/// <summary>");
+        foreach (var line in Summary.Split(['\r', '\n'], StringSplitOptions.RemoveEmptyEntries).Select(static text => $"/// {text}"))
+            sb.AppendLine(line);
+        return sb.AppendLine("/// </summary>")
+        .AppendLine(Generator.GenerateMember(param))
+        .ToString();
+    }
 }
 
 record GenerateField(string Name, bool IsReadonly, string Scope, string AssignFormat, string? Type) : IGeneratedMember

PrimaryParameter.Tests/PrimaryParameterSnapshotTests.cs

@@ -276,4 +276,17 @@ public class C([Property(Summary = "Documentation")] int i);
         // Pass the source code to our helper and snapshot test the output
         return TestHelper.Verify(source);
     }
+
+    [Fact]
+    public Task GenerateMultiLineDocumentation()
+    {
+        // The source code to test
+        var source = """
+            using PrimaryParameter.SG;
+            public class C([Property(Summary = "Documentation\nNew Line")] int i);
+            """;
+
+        // Pass the source code to our helper and snapshot test the output
+        return TestHelper.Verify(source);
+    }
 }

PrimaryParameter.Tests/Verify/PrimaryParameterSnapshotTests.GenerateMultiLineDocumentation/DoNotUseAttribute.g.verified.cs

@@ -0,0 +1,12 @@
+//HintName: DoNotUseAttribute.g.cs
+#pragma warning disable
+// <auto-generated/>
+using global::System;
+namespace PrimaryParameter.SG
+{
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
+    sealed class DoNotUseAttribute : Attribute
+    {
+        public bool AllowInMemberInit { get; init; }
+    }
+}

PrimaryParameter.Tests/Verify/PrimaryParameterSnapshotTests.GenerateMultiLineDocumentation/FaustVX.PrimaryParameter.SG.g.verified.cs

@@ -0,0 +1,11 @@
+//HintName: FaustVX.PrimaryParameter.SG.g.cs
+#pragma warning disable
+// <auto-generated/>
+partial class C
+{
+    /// <summary>
+    /// Documentation
+    /// New Line
+    /// </summary>
+    public int I { get; init; } = i;
+}

PrimaryParameter.Tests/Verify/PrimaryParameterSnapshotTests.GenerateMultiLineDocumentation/FieldAttribute.g.verified.cs

@@ -0,0 +1,17 @@
+//HintName: FieldAttribute.g.cs
+#pragma warning disable
+// <auto-generated/>
+using global::System;
+namespace PrimaryParameter.SG
+{
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = true)]
+    sealed class FieldAttribute : Attribute
+    {
+        public string Name { get; init; }
+        public string AssignFormat { get; init; }
+        public Type Type { get; init; }
+        public bool IsReadonly { get; init; }
+        public string Scope { get; init; }
+        public string Summary { get; init; }
+    }
+}

PrimaryParameter.Tests/Verify/PrimaryParameterSnapshotTests.GenerateMultiLineDocumentation/PropertyAttribute.g.verified.cs

@@ -0,0 +1,17 @@
+//HintName: PropertyAttribute.g.cs
+#pragma warning disable
+// <auto-generated/>
+using global::System;
+namespace PrimaryParameter.SG
+{
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = true)]
+    sealed class PropertyAttribute : Attribute
+    {
+        public string Name { get; init; }
+        public string AssignFormat { get; init; }
+        public Type Type { get; init; }
+        public string Setter { get; init; }
+        public string Scope { get; init; }
+        public string Summary { get; init; }
+    }
+}

PrimaryParameter.Tests/Verify/PrimaryParameterSnapshotTests.GenerateMultiLineDocumentation/RefFieldAttribute.g.verified.cs

@@ -0,0 +1,16 @@
+//HintName: RefFieldAttribute.g.cs
+#pragma warning disable
+// <auto-generated/>
+using global::System;
+namespace PrimaryParameter.SG
+{
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = true)]
+    sealed class RefFieldAttribute : Attribute
+    {
+        public string Name { get; init; }
+        public string Scope { get; init; }
+        public bool IsReadonlyRef { get; init; }
+        public bool IsRefReadonly { get; init; }
+        public string Summary { get; init; }
+    }
+}