The widgettester allows building and interacting with widgets in a test environment. This recipe demonstrates the core features. The testwidgets() function automatically creates a new widgettester for each test case, and is used in.
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To verify that lists contain the expected content using widget tests, you need a way to scroll through lists to search for particular items. This recipe demonstrated three of these methods, and several more. To enable the performanceoverlay widget in your code, set the showperformanceoverlay property to true on the materialapp, cupertinoapp, or widgetsapp.
The find constant provided by the flutter_test package provides several ways to locate widgets in the test environment.
To scroll through lists via integration tests, use the. Animate a widget using a physics simulation learn how to move a widget from a dragged point back to the center using a spring simulation. You'll replace two stateless widgets—the solid red star and the numeric count next to it—with a single custom stateful widget that manages a row with two children widgets: Testing a widget involves multiple classes and requires a test environment that provides the.
The goal of a widget test is to verify that the widget's ui looks and interacts as expected. Widget testing a catalog of recipes for adding widget testing to your flutter app. In the test environment, flutter doesn't automatically rebuild widgets when the state changes. The test package provides the core framework for writing unit tests, and the flutter_test package provides additional utilities for testing widgets.
To ensure that the widget tree is rebuilt after simulating a user interaction, call the pump().
