flagged bugs fix

integration_test/otp_send_test.dart

@@ -0,0 +1,67 @@
+// Confirms Firebase Phone Auth actually dispatches an OTP SMS.
+//
+// This must run on a real device or emulator with Google Play services —
+// `flutter_test`'s headless VM has no platform channels, so FirebaseAuth
+// would throw MissingPluginException there. Each run sends one real, billed
+// SMS (Blaze plan) to the hardcoded number below.
+//
+// Run with a device attached:
+//   flutter test integration_test/otp_send_test.dart -d <device-id>
+// (list device ids with `flutter devices`)
+import 'dart:async';
+
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:firebase_core/firebase_core.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  testWidgets('Firebase dispatches OTP SMS to a real phone number',
+      (tester) async {
+    await Firebase.initializeApp();
+
+    const phoneNumber = '+916374946729';
+    final completer = Completer<String>();
+
+    await FirebaseAuth.instance.verifyPhoneNumber(
+      phoneNumber: phoneNumber,
+      timeout: const Duration(seconds: 60),
+      verificationCompleted: (PhoneAuthCredential credential) {
+        if (!completer.isCompleted) {
+          completer.complete('verificationCompleted (device auto-verified)');
+        }
+      },
+      verificationFailed: (FirebaseAuthException e) {
+        if (!completer.isCompleted) {
+          completer.completeError('verificationFailed: ${e.code} — ${e.message}');
+        }
+      },
+      codeSent: (String verificationId, int? resendToken) {
+        if (!completer.isCompleted) {
+          completer.complete('codeSent (verificationId: $verificationId)');
+        }
+      },
+      codeAutoRetrievalTimeout: (String verificationId) {
+        if (!completer.isCompleted) {
+          completer.complete(
+              'codeAutoRetrievalTimeout (verificationId: $verificationId) — request was accepted, auto-retrieval just timed out');
+        }
+      },
+    );
+
+    final result = await completer.future.timeout(
+      const Duration(seconds: 45),
+      onTimeout: () => throw TimeoutException(
+          'No callback fired within 45s — check phone provider is enabled, '
+          'Blaze billing is active, and SHA-1/SHA-256 fingerprints are '
+          'registered in Firebase console.'),
+    );
+
+    debugPrint('OTP SEND RESULT: $result');
+    expect(result, isNotEmpty);
+    expect(result, isNot(contains('verificationFailed')));
+  });
+}