How to mock firebaseAuth.verifyPhoneNumber(

[bettdouglas]

How can I mock the function so that I can test the different callbacks which could probably happen?

  void _verify(String phoneNo) async {
    await firebaseAuth.verifyPhoneNumber(
      phoneNumber: phoneNo,
      verificationCompleted: (PhoneAuthCredential cred) {
        add(AuthEvent.verificationCompleted(cred));
      },
      verificationFailed: (exception) {
        add(AuthEvent.verificationFailed(exception));
      },
      codeSent: (verificationId, _) {
        add(AuthEvent.codeSent(verificationId));
      },
      codeAutoRetrievalTimeout: (verificationId) {
        add(AuthEvent.codeRetrievalTimeout(verificationId));
      },
      timeout: const Duration(minutes: 2),
    );
  }