Let’s hope that here we can solve issues and ask questions about testing, E2E, widgets, and integration.
P.S.: My English isn’t very good 
Hi, so what is your question haha? 
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Looks like there is no question, but here is some tips using generative AI to write widget tests. Provide a widget test template content. Tell ChatGPT that you will give a widget and you want the widget tests according to this template strictly.
This is the widget test template:
/// This is a template for widget tests.
/// It is meant to be copied and pasted into a new file and then modified to fit the widget or feature you're testing
void main() {
/// Name of the widget you're testing
group('Widget tests group description', () {
/// Registers a function to be run once before all tests.
/// This is where you should register all fallback values for fakes
setUpAll(() {});
/// This is a setup method that will be called everytime before each test.
/// Use it to initialize and register mocks.
/// Avoid stubbing on top level, rather do it in the method group setup callback or test case itself.
/// If you need test objects to be created, do it in the group or test case itself.
///
/// only do generic setup here, if you need to do specific setup for a test case, do it in the test case
setUp(() {
/// Add dependency injection for a View modedel if needed for
// DependencyInjection.bindMock((i) => testViewModel);.
});
/// This is a teardown method that will be called after each test
/// use it to dispose of mocks and fakes if needed
tearDown(() {});
/// If widget functionality is very complex and might be divided to a smaller logical groups,
/// test suite should be split to a smaller groups to ease understanding.
/// Any setup that is specific to the subgroup and needs to be done once should be done in the subgroup's setup method
/// otherwise in the test case itself
group('subgroup-1', () {
/// You can use the setup method to do stubbing for all test cases. If you need to do specific stubbing for a
/// test case, do it in the test case itself.
setUp(() {});
/// Each test case should have a name that describes what it is testing and what the expected result is.
/// Don't test too much in one case. If you need to test multiple things, create multiple test cases.
/// Ideally, start the name with the word 'should' to make it clear what the expected result is and use the
/// word 'when' to describe a specific scenario.
testWidgets('should <expected result> when <action to perform>', (tester) async {
/// Arrange
/// Create test objects and stub methods here
/// Set up needed data.
await tester.pumpWidget(
const WidgetTestApp(
child: SizedBox.shrink(), // Insert your widget to test here.
),
);
await tester.pumpAndSettle();
/// Act
/// Call the method you're testing
/// Perform Step 1.
/// Perform Step 2.
/// Assert
/// Verify that the method did what it was supposed to do
/// Assert that steps reached <expected result>
expect('Actual result', 'Expected result', reason: 'Failure reason');
});
testWidgets('should <expected result 2> when <action to perform 2>', (tester) async {});
});
group('subgroup-2', () {
setUp(() {});
testWidgets('should <expected result 1> when <actions to perform 1>', (tester) async {});
testWidgets('should <expected result 2> when <actions to perform 2>', (tester) async {});
});
});
}
similarly unit test template:
/// This is a template for unit tests. We use Flutter Mocktail package for unit tests.
/// It is meant to be copied and pasted into a new file and then modified to fit the class you're testing
void main() {
/// Name of the class you're testing
group(UnitTestTemplate, () {
/// Registers a function to be run once before all tests.
/// This is where you should register all fallback values for fakes
setUpAll(() {});
/// This is a setup method that will be called everytime before each test.
/// Use it to initialize and register mocks.
/// Avoid stubbing on top level, rather do it in the method group setup callback or test case itself.
/// If you need test objects to be created, do it in the group or test case itself.
///
/// only do generic setup here, if you need to do specific setup for a test case, do it in the test case
setUp(() {});
/// This is a teardown method that will be called after each test
/// use it to dispose of mocks and fakes if needed
tearDown(() {});
/// Each instance method should have its own group with the name of the method
/// Any setup that is specific to the method and needs to be done once should be done in the group's setup method
/// otherwise in the test case itself
group('method-1', () {
/// You can use the setup method to do stubbing for all test cases. If you need to do specific stubbing for a
/// test case, do it in the test case itself.
setUp(() {});
/// Each test case should have a name that describes what it is testing and what the expected result is.
/// Don't test too much in one case. If you need to test multiple things, create multiple test cases.
/// Ideally, start the name with the word 'should' to make it clear what the expected result is and use the
/// word 'when' to describe a specific scenario.
test('case 1', () {
/// Arrange
/// Create test objects and stub methods here
/// Act
/// Call the method you're testing
/// Assert
/// Verify that the method did what it was supposed to do
});
test('case 2', () {});
});
group('method-2', () {
setUp(() {});
test('case 1', () {});
test('case 2', () {});
});
});
}
If you are interested in creating integration tests using Riverpod (to override services with mocks) and firebase_auth_mock (to override Firebase authentication), I built a sample app to help me understand how to do it (and to document a problem in the firebase_auth_mocks package):