What is unit testing in Flutter?

Unit tests are handy for verifying the behavior of a single function, method, or class . The test package provides the core framework for writing unit tests, and the flutter_test package provides additional utilities for testing widgets.

To locate widgets in a test environment, use the Finder classes . While it’s possible to write your own Finder classes, it’s generally more convenient to locate widgets using the tools provided by the flutter_test package.

The widget test is testing UI components , so it is also called Component Testing. It is used to test a single widget. The main goal of widget testing is to check whether the widget works as expected. A user can write test cases for every widget present in the project.20 Ağu 2021

Widgets are the central class hierarchy in the Flutter framework. A widget is an immutable description of part of a user interface . Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).

In Android Studio, go to Run -> Edit Configurations. On Left hand section of the configuration screen, click on + icon and select Flutter Test configuration .