An introduction to widget testing - Flutter In the introduction to unit testing recipe, you learned how to test Dart classes using the test package To test widget classes, you need a few additional tools provided by the flutter_test package, which ships with the Flutter SDK The flutter_test package provides the following tools for testing widgets: The WidgetTester allows building and interacting with widgets in a test environment The
Handle scrolling - Flutter How to handle scrolling in a widget test Now, you can write a test In this example, scroll through the list of items and verify that a particular item exists in the list The WidgetTester class provides the scrollUntilVisible () method, which scrolls through a list until a specific widget is visible This is useful because the height of the items in the list can change depending on the
Flutter Widget Previewer Learn how to use the Flutter Widget Previewer to see your widgets render in real-time, separate from your full app
Testing Flutter apps Testing a widget involves multiple classes and requires a test environment that provides the appropriate widget lifecycle context For example, the Widget being tested should be able to receive and respond to user actions and events, perform layout, and instantiate child widgets
Check app functionality with an integration test - Flutter The integration_test package lets you: Use the flutter drive command to run tests on a physical device or emulator Run on Firebase Test Lab, to automate testing on a variety of devices Use flutter_test APIs to write tests in a style similar to widget tests
Test orientation - Flutter This test makes sure that the orientation is landscape and that only 3 columns of data appear in the app: In test widget_test dart, inside of the Orientation group, add the following test after the landscape test:
Mock dependencies using Mockito - Flutter To use the mockito package, add it to the pubspec yaml file along with the flutter_test dependency in the dev_dependencies section This example also uses the http package, so define that dependency in the dependencies section mockito: 5 0 0 supports Dart's null safety thanks to code generation To run the required code generation, add the build_runner dependency in the dev_dependencies
Use the Flutter inspector The Flutter widget inspector is a powerful tool for visualizing and exploring Flutter widget trees The Flutter framework uses widgets as the core building block for anything from controls (such as text, buttons, and toggles), to layout (such as centering, padding, rows, and columns) The inspector helps you visualize and explore Flutter widget trees, and can be used for the following
Visual Studio Code - Flutter Flutter Property Editor The Flutter Property Editor is a powerful tool provided by the Flutter extension that lets you view and modify widget properties directly from its visual interface
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