fix: correct misleading fallback test for PathReplacer workspaceFolder

The previous test asserted a double-nested path as expected behavior,
which was actually a bug demonstration. Replace with a semantic check
that verifies ${workspaceFolder} falls back to cwd when not provided.

Author: recca0120

packages/phpunit/src/Configuration/PathReplacer.test.ts

@@ -335,9 +335,7 @@ describe('PathReplacer', () => {
         it(`falls back to cwd when workspaceFolder is not provided`, () => {
             const pathReplacer = new PathReplacer({ cwd });
 
-            expect(
-                pathReplacer.toRemote(`${VAR_WORKSPACE_FOLDER}/apps/api/phpunit.xml.dist`),
-            ).toEqual('/workspace/apps/api/apps/api/phpunit.xml.dist');
+            expect(pathReplacer.replacePathVariables(VAR_WORKSPACE_FOLDER)).toEqual(cwd);
         });
     });
 });