How do you perform testing in Flutter, including unit, widget, and integration tests?

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Flutter provides a comprehensive testing framework that supports unit, widget, and integration testing to ensure the quality and reliability of applications. Here's how each type is performed:

1. Unit Testing

Purpose: Test individual functions, methods, or classes in isolation.

• Use the test package.

• Write tests in a test/ directory.

2. Widget Testing

Purpose: Test UI components in isolation by rendering them in a test environment.

• Use the flutter_test package.

• Simulate user interactions and verify UI behavior.

3. Integration Testing

Purpose: Test the full app or large parts of it, including interactions between widgets and services.

• Use the integration_test package.

• Requires a test driver and running on a real or virtual device.

Each testing level in Flutter helps catch different types of issues early, leading to more stable and maintainable apps.

Read More

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