Always emit TUnit.Mocks.Generated namespace from source generator

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_Inheriting_Multiple_Interfaces.verified.txt

@@ -173,3 +173,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Async_Methods.verified.txt

@@ -408,3 +408,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Events.verified.txt

@@ -211,3 +211,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Generic_Methods.verified.txt

@@ -112,3 +112,10 @@ namespace TUnit.Mocks.Generated
         }
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Inherited_Static_Abstract_Members.verified.txt

@@ -115,3 +115,10 @@ namespace TUnit.Mocks.Generated
         }
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Keyword_Parameter_Names.verified.txt

@@ -273,3 +273,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Mixed_Members.verified.txt

@@ -349,3 +349,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Nullable_Reference_Type_Parameters.verified.txt

@@ -540,3 +540,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Out_Ref_Parameters.verified.txt

@@ -274,3 +274,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Overloaded_Methods.verified.txt

@@ -548,3 +548,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Properties.verified.txt

@@ -86,3 +86,10 @@ namespace TUnit.Mocks.Generated
         }
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_RefStruct_Parameters.verified.txt

@@ -117,3 +117,10 @@ namespace TUnit.Mocks.Generated
         }
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Static_Abstract_Members.verified.txt

@@ -137,3 +137,10 @@ namespace TUnit.Mocks.Generated
         }
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Interface_With_Static_Abstract_Transitive_Return_Type.verified.txt

@@ -182,3 +182,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Multi_Method_Interface.verified.txt

@@ -313,3 +313,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator.Tests/Snapshots/Simple_Interface_With_One_Method.verified.txt

@@ -165,3 +165,10 @@ namespace TUnit.Mocks.Generated
         public void WasNeverCalled(string? message) => _engine.CreateVerification(_memberId, _memberName, _matchers).WasNeverCalled(message);
     }
 }
+
+// ===== FILE SEPARATOR =====
+
+// <auto-generated/>
+#nullable enable
+
+namespace TUnit.Mocks.Generated;

TUnit.Mocks.SourceGenerator/MockGenerator.cs

@@ -10,6 +10,17 @@ public class MockGenerator : IIncrementalGenerator
 {
     public void Initialize(IncrementalGeneratorInitializationContext context)
     {
+        // Always emit the TUnit.Mocks.Generated namespace so that global usings never fail
+        context.RegisterPostInitializationOutput(ctx =>
+        {
+            ctx.AddSource("TUnit.Mocks.Generated.Namespace.g.cs", """
+                // <auto-generated/>
+                #nullable enable
+
+                namespace TUnit.Mocks.Generated;
+                """);
+        });
+
         // Step 1a: Find all Mock.Of<T>() invocations and transform to model arrays
         var mockTypes = context.SyntaxProvider
             .CreateSyntaxProvider(