![]() īuild.yaml - contains configurations for build_runner. How Surf structures automated tests in a Flutter project. As a result, implementing support for both widget and E2E tests became easier. E2E tests now use the same API as widget test - inside the flutter_test package using the WidgetTester. The first thing that catches your eye is everything’s become simpler. Now, we only have WidgetTester: Flutter Driver is deprecated. It loaded the app and allowed you to imitate interface interactions. With it, you could load a widget and test it. Widget components had a class called WidgetTester. Before that, Flutter handled widget tests and E2E tests separately. The new packageĪt the end of 2020, Flutter updated the flutter_test package. At least one for each screen covered by the E2E scenario, as well as for each widget element, if necessary. To check if separate modules of the system are functioning, we need widget tests. We cover a business scenario of both successful and unsuccessful authorization with several negative and positive test plans using E2E tests. A simple authorization scenario consisting of three separate screens You can get the most out of automated tests by running them on stable features as often as possible. Their instability is due to the infrastructure rather than the way they are written at any time, you may be left with a server that went down, a request that failed, or a real device that is showing a system dialog. At the same time, it’s pointless to run them on pull requests and things like that: E2E tests are slow and unstable. Otherwise, it’s hard to be sure that the system is fully functional. ![]() Testing your app with comprehensive user scenarios and an actual server is a must. They work on mock data and are run a few times faster.Į2E tests. Thorough testing needs to have both widget and E2E tests. Implementing and using automated tests in Flutter: the strategy Read here how we hire the Flutter developers.Īll widget and E2E tests are written by QA automation engineers both types of tests are closely connected with the finished app and test plans. End-to-end (E2E) are the tests where we load an entire app and simulate user actions within a real infrastructure with real services, APIs, etc.Īt Surf, all unit tests are written by developers because they tend to be much more familiar with an app.A widget can be as big as an entire screen or as small as its specific elements: fields, buttons, checkboxes, etc. All Flutter apps consist of widgets: Widget tests help emulate widgets and test them as needed. Since it doesn’t test the interface, there’s no need to emulate the app. Unit tests to check a specific module of a system For example, to make sure that a component controller sets the right state.With the Flutter UI framework, automated tests can be written natively using Dart. Read more about app testing in Surf in the article. Today we’ll talk about automated tests in the Flutter framework in the context of mobile applications. After all, the apps it creates are cross-platform, which means the automated tests should be as well… However, a stable package for E2E and widget tests was added to the Flutter framework only a short while ago, namely, at the beginning of December 2020. When Surf first turned its hand to Flutter development, we wondered what could be automated with Flutter alone.
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