refactor: remove testSupport from generated interface modules

The tool was creating an empty TestSupport/ directory and keeping
.testSupport() in the interface module's features with no content.
Remove both since they serve no purpose.

Author: kaanbiryol

README.md

@@ -17,7 +17,7 @@ Given a module name and its compiler arguments, the tool:
 1. **Extracts the module interface** via SourceKit (the same engine Xcode uses for code completion and indexing)
 2. **Rewrites the interface** using SwiftSyntax - strips private/internal imports (prefixed with `_`), removes `some`/`any` type erasure wrappers, simplifies member type syntax, filters out builder classes, and merges duplicate extensions
 3. **Replaces declarations** with their original source versions when available (preserving doc comments, attributes, and formatting)
-4. **Creates the interface module directory** with `Sources/` and `TestSupport/` folders
+4. **Creates the interface module directory** with a `Sources/` folder
 5. **Rewrites import statements** across the codebase (`import Module` -> `import ModuleInterface`)
 6. **Updates Project.swift** to register the new interface module with the correct dependencies (Tuist-specific)
 
@@ -54,7 +54,7 @@ cd SampleProject
 The script builds the tool, compiles a sample Swift module via SPM, extracts compiler arguments, and runs the tool. Use `--write` to execute the full pipeline, or omit it to preview with `--print-only`.
 
 After running with `--write`, you'll see:
-- `libraries/business/UserProfileInterface/` created with `Sources/` and `TestSupport/`
+- `libraries/business/UserProfileInterface/` created with `Sources/`
 - `Project.swift` updated with the new interface module declaration
 
 To reset the sample project after a full run:

Sources/FileOps.swift

@@ -22,11 +22,9 @@ func createInterfaceModuleDirectoryWithSource(_ directory: String, moduleName: S
                         let interfacePath = firstLevelPath
                         let interfaceFolder = (interfacePath as NSString).appendingPathComponent("\(moduleName)Interface")
                         let sourcesFolder = (interfaceFolder as NSString).appendingPathComponent("Sources")
-                        let testSupportFolder = (interfaceFolder as NSString).appendingPathComponent("TestSupport")
-                        
+
                         try createDirectoryIfNeeded(at: interfaceFolder)
                         try createDirectoryIfNeeded(at: sourcesFolder)
-                        try createDirectoryIfNeeded(at: testSupportFolder)
 
                         let filePath = (sourcesFolder as NSString).appendingPathComponent("\(moduleName)Interface.swift")
                         try createFile(at: filePath, withContent: fileContent)

Sources/ProjectRewriter.swift

@@ -129,7 +129,7 @@ private class ProjectRewriter: SyntaxRewriter {
                         featuresArray.elements.filter { element in
                             if let functionCall = element.expression.as(FunctionCallExprSyntax.self) {
                                 let functionName = functionCall.calledExpression.as(MemberAccessExprSyntax.self)?.name.text
-                                return functionName != "snapshotTests" && functionName != "tests"
+                                return functionName != "snapshotTests" && functionName != "tests" && functionName != "testSupport"
                             }
                             return true
                         }