전역 구조 리팩터링 및 테스트 확장

test/features/masters/user/presentation/pages/user_page_test.dart

@@ -55,7 +55,6 @@ void main() {
   group('플래그 On', () {
     late _MockUserRepository userRepository;
     late _MockGroupRepository groupRepository;
-
     setUp(() {
       dotenv.testLoad(fileInput: 'FEATURE_USERS_ENABLED=true\n');
       userRepository = _MockUserRepository();
@@ -153,6 +152,14 @@ void main() {
     });
 
     testWidgets('신규 등록 성공', (tester) async {
+      final view = tester.view;
+      view.physicalSize = const Size(1280, 800);
+      view.devicePixelRatio = 1.0;
+      addTearDown(() {
+        view.resetPhysicalSize();
+        view.resetDevicePixelRatio();
+      });
+
       var listCallCount = 0;
       when(
         () => userRepository.list(
@@ -214,9 +221,21 @@ void main() {
       await tester.enterText(editableTexts.at(0), 'A010');
       await tester.enterText(editableTexts.at(1), '신규 사용자');
 
-      await tester.tap(find.text('그룹을 선택하세요'));
-      await tester.pumpAndSettle();
-      await tester.tap(find.text('관리자'));
+      final selectFinder = find.descendant(
+        of: dialog,
+        matching: find.byType(ShadSelect<int?>),
+      );
+      final selectElement = tester.element(selectFinder);
+      final renderBox = selectElement.renderObject as RenderBox;
+      final globalCenter = renderBox.localToGlobal(
+        renderBox.size.center(Offset.zero),
+      );
+      await tester.tapAt(globalCenter);
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 200));
+      final adminOption = find.text('관리자', skipOffstage: false);
+      expect(adminOption, findsWidgets);
+      await tester.tap(adminOption.first, warnIfMissed: false);
       await tester.pumpAndSettle();
 
       await tester.tap(find.text('등록'));