widget_test_harness library

Classes

CommonTester: abstraction so mixins can be written to support dart tests and widget tests uses pump, pumpAndSettle, and idle in widget tests. Uses Future.value and Future.microtask for unit tests
FlutterTestHarness: Base class for UnitTestHarness and WidgetTestHarness intended for mixins to conform to build up testing feature dependencies see NetworkImageMixin for example
Given<T extends FlutterTestHarness>: Given class used to setup the test.
GWTBase<T extends FlutterTestHarness>: base class for Given, When, Then.
HarnessSetup<H extends FlutterTestHarness>: Used to generate a function that has the callback with the appropriate given,when,then Provides common setup functionality that mixins can use
PublicGiven<T extends FlutterTestHarness>
PublicThen<T extends FlutterTestHarness>
PublicWhen<T extends FlutterTestHarness>
Then<T extends FlutterTestHarness>: Then class used for asserting behavior
UnitCommonTester
UnitTestHarness: class to subclass for any test that does not take a WidgetTester use HarnessSetup.setupHarness to create a harness then pass it into the body of a test
When<T extends FlutterTestHarness>: When class used for when user performs action or something happens in the system
WidgetCommonTester
WidgetTestHarness: class to subclass for any test that takes a WidgetTester

NetworkImageMixin: mixin to provide support for loading images instead of throwing an error provides support to load arbitrary images based on the uri
SemanticTesterMixin: Add to harness to support semantic testing Handles the setup/teardown

ClassHarnessCallback<T extends FlutterTestHarness> = Future<void> Function(PublicGiven<T>, PublicWhen<T>, PublicThen<T>): This function is used to generate a function to pass into a unit test From there you can use the Given, When, Then to compose the test case
WidgetTesterReturn = Future<void> Function(WidgetTester tester)