refactor: merge duplicate switch case and avoid mutating replacePath parameter

- Consolidate namespace_use_declaration and use_declaration into single fallthrough case
- ProcessBuilder.replacePath now returns a new object instead of mutating the input

Author: recca0120

packages/phpunit/src/Interpreter/AstParser/TreeSitter/TreeSitterAdapter.ts

@@ -955,7 +955,6 @@ function adaptTopLevelNode(node: SyntaxNode): AstNode | null {
         case 'method_declaration':
             return adaptMethod(node);
         case 'namespace_use_declaration':
-            return adaptNamespaceUse(node);
         case 'use_declaration':
             return adaptNamespaceUse(node);
         case 'expression_statement':

packages/phpunit/src/ProcessBuilder/ProcessBuilder.ts

@@ -88,23 +88,25 @@ export class ProcessBuilder {
         return { runtime, args, options: { ...this.options, env: this.getEnvironment() } };
     }
 
-    replacePath(result: TestResult) {
+    replacePath(result: TestResult): TestResult {
+        const replaced: Record<string, unknown> = {};
+
         if ('locationHint' in result && result.locationHint) {
-            result.locationHint = this.pathReplacer.toLocal(result.locationHint);
+            replaced.locationHint = this.pathReplacer.toLocal(result.locationHint);
         }
 
         if ('file' in result && result.file) {
-            result.file = this.pathReplacer.toLocal(result.file);
+            replaced.file = this.pathReplacer.toLocal(result.file);
         }
 
         if ('details' in result) {
-            result.details = result.details.map(({ file, line }) => ({
+            replaced.details = result.details.map(({ file, line }) => ({
                 file: this.pathReplacer.toLocal(file),
                 line,
             }));
         }
 
-        return result;
+        return Object.keys(replaced).length > 0 ? { ...result, ...replaced } : result;
     }
 
     toString() {