feat(auth): 优化登录页布局与字段反馈

test/auth/auth_k21_test.dart

@@ -0,0 +1,85 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
+import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';
+
+import 'package:fruitshorts/core/data/remote/api_client.dart';
+import 'package:fruitshorts/core/data/remote/auth_api.dart';
+import 'package:fruitshorts/core/data/services/auth_controller.dart';
+import 'package:fruitshorts/core/data/services/auth_session_store.dart';
+import 'package:fruitshorts/core/platform/haptics.dart';
+import 'package:fruitshorts/l10n/app_localizations.dart';
+import 'package:fruitshorts/pages/auth/auth_view.dart';
+
+import '../support/fake_haptics.dart';
+import '../support/fake_http_adapter.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferencesAsyncPlatform.instance =
+        InMemorySharedPreferencesAsync.empty();
+  });
+
+  testWidgets('should_show_sign_up_subtitle_and_password_rule_when_switched', (
+    tester,
+  ) async {
+    await _pumpAuth(tester);
+    final l10n = await AppLocalizations.delegate.load(const Locale('en'));
+
+    expect(find.byKey(const Key('auth-password-rule')), findsNothing);
+    await tester.tap(find.byKey(const Key('auth-mode-sign-up')));
+    await tester.pumpAndSettle();
+
+    expect(find.text(l10n.authSignUpSubtitle), findsOneWidget);
+    final rule = find.byKey(const Key('auth-password-rule'));
+    expect(rule, findsOneWidget);
+    expect(tester.widget<Text>(rule).data, l10n.authPasswordHint);
+  });
+
+  testWidgets('should_apply_semantic_error_border_when_email_is_invalid', (
+    tester,
+  ) async {
+    await _pumpAuth(tester);
+    await tester.enterText(find.byKey(const Key('auth-email')), 'invalid');
+    await tester.enterText(find.byKey(const Key('auth-password')), 'abcd1234');
+    await tester.tap(find.byKey(const Key('auth-submit')));
+    await tester.pumpAndSettle();
+
+    final emailFinder = find.byKey(const Key('auth-email'));
+    final email = tester.widget<TextField>(emailFinder);
+    final errorBorder = email.decoration!.errorBorder! as OutlineInputBorder;
+    final scheme = Theme.of(tester.element(emailFinder)).colorScheme;
+    expect(errorBorder.borderSide.color, scheme.error);
+    expect(errorBorder.borderSide.width, 1.5);
+  });
+}
+
+Future<void> _pumpAuth(WidgetTester tester) async {
+  final auth = AuthController(
+    AuthApi(
+      ApiClient(
+        baseUrl: 'http://127.0.0.1:1',
+        adapter: FakeHttpAdapter((_) async => FakeHttpResponse('{}', 500)),
+      ),
+    ),
+    AuthSessionStore(),
+  );
+  await tester.pumpWidget(
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider<AuthController>.value(value: auth),
+        Provider<Haptics>.value(value: FakeHaptics()),
+      ],
+      child: MaterialApp(
+        locale: const Locale('en'),
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: const AuthPage(),
+      ),
+    ),
+  );
+  await tester.pumpAndSettle();
+}