Testing in Flutter

Sep 19 2023 · Dart 2.19.3, Flutter 3.7.6, Android Studio 2021.3.1, Visual Studio Code 1.7.4

Part 2: Write Unit Tests

06. Learn Mocking Unit Test Data

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Previous episode: 05. Test Change Notifier Next episode: 07. Test Quotes Notifier

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Let’s learn about mocking. In the previous episodes, you learned about unit testing. You wrote your first unit test. You also learned about the concept of mocking. In this episode, you will learn how to mock data. Mock, in general, means creating fake data or class.

class MockQuotesService implements QuotesService {
  
}
@override  
Future<void> getQuotes() async {
  // Todo: adding a function which will return mock data   
}
return [
  Quotes(
    1,
    'Test Quote 1',
    'Test Author 1',
  ),
  Quotes(
    2,
    'Test Quote 2',
    'Test Author 2',
  ),
  Quotes(
    3,
    'Test Quote 3',
    'Test Author 3',
  ),
];
dev_dependencies:
  flutter_test:
    sdk: flutter
  mocktail: <latest_version>
class MockQuotesService extends Mock implements QuotesService {}
    late MockQuotesService mockQuotesService;