### Mock Firebase Auth Sign-in with Google Example

Source: https://github.com/atn832/firebase_auth_mocks/blob/master/README.md

Demonstrates how to mock Google Sign-In and Firebase Auth for unit testing. Ensure firebase_auth_mocks and google_sign_in_mocks are added as dev dependencies.

```dart
import 'package:firebase_auth_mocks/firebase_auth_mocks.dart';
import 'package:google_sign_in_mocks/google_sign_in_mocks.dart';

main() {
    // Mock sign in with Google.
    final googleSignIn = MockGoogleSignIn();
    final signinAccount = await googleSignIn.signIn();
    final googleAuth = await signinAccount.authentication;
    final AuthCredential credential = GoogleAuthProvider.getCredential(
      accessToken: googleAuth.accessToken,
      idToken: googleAuth.idToken,
    );
    // Sign in.
    final user = MockUser(
      isAnonymous: false,
      uid: 'someuid',
      email: 'bob@somedomain.com',
      displayName: 'Bob',
    );
    final auth = MockFirebaseAuth(mockUser: user);
    final result = await auth.signInWithCredential(credential);
    final user = await result.user;
    print(user.displayName);
}
```

--------------------------------

### Mocking confirmPasswordReset with Named Parameter Matching

Source: https://github.com/atn832/firebase_auth_mocks/blob/master/README.md

Match specific named parameters like 'code' using Dart matchers. If a named parameter is omitted in the mock setup, it defaults to matching 'anything'. This snippet demonstrates throwing an exception based on the 'code' parameter's content.

```dart
whenCalling(Invocation.method(
          #confirmPasswordReset, null, {#code: contains('code')}))
      .on(auth)
      .thenThrow(FirebaseAuthException(code: 'invalid-action-code'));
  expect(
    () async => await auth.confirmPasswordReset(
      code: 'code',
      newPassword: 'password',
    ),
    throwsA(isA<FirebaseAuthException>()),
  );
  expect(
      () => auth.confirmPasswordReset(
            code: '10293',
            newPassword: 'password',
          ),
      returnsNormally);
```

--------------------------------

### Mocking confirmPasswordReset with Dart Matchers

Source: https://github.com/atn832/firebase_auth_mocks/blob/master/README.md

Use Dart matchers like 'contains' to conditionally mock method calls. This example throws a FirebaseAuthException if the provided code contains 'code'. It also shows how to test for normal return.

```dart
final auth = MockFirebaseAuth();
whenCalling(Invocation.method(
        #confirmPasswordReset, null, {#code: contains('code')}))
    .on(auth)
    .thenThrow(FirebaseAuthException(code: 'invalid-action-code'));
expect(
  () => auth.confirmPasswordReset(
    code: 'code',
    newPassword: 'password',
  ),
  throwsA(isA<FirebaseAuthException>()),
);
expect(
  () => auth.confirmPasswordReset(
    code: '1234',
    newPassword: 'password',
  ),
  returnsNormally,
);
```

--------------------------------

### Mock FirebaseAuth Throwing Exception Based on Positional Parameter

Source: https://github.com/atn832/firebase_auth_mocks/blob/master/README.md

Sets up MockFirebaseAuth to throw a FirebaseAuthException when verifyPhoneNumber is called with a specific phone number. Other phone numbers will proceed normally, allowing for targeted error simulation.

```dart
final auth = MockFirebaseAuth();
whenCalling(Invocation.method(#verifyPhoneNumber, '12-345-6789'))
    .on(auth)
    .thenThrow(FirebaseAuthException(code: 'invalid-action-code'));
expect(() => auth.verifyPhoneNumber('12-345-6789'),
    throwsA(isA<FirebaseAuthException>()));
expect(() => auth.verifyPhoneNumber('00-222-4444'),
    returnsNormally);
```

--------------------------------

### Mock FirebaseAuth Throwing Exception Regardless of Parameters

Source: https://github.com/atn832/firebase_auth_mocks/blob/master/README.md

Configures MockFirebaseAuth to throw a specific FirebaseAuthException when signInWithCredential is called, regardless of the provided arguments. Useful for testing error handling paths.

```dart
whenCalling(Invocation.method(#signInWithCredential, null))
  .on(auth)
  .thenThrow(FirebaseAuthException(code: 'bla'));
expect(
  () => auth.signInWithCredential(FakeAuthCredential()),
  throwsA(isA<FirebaseAuthException>()),
);
```

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