This happens when ListView has no constrained height which makes it gets an infinite height, you can solve this using two solutions add shrinkWrap: true as a parameter which will tell the ListView to use a little space as possible, Wrap your ListView with a constrained height widget, such as a SizedBox or a Container, … Read more
When assigning the Mock object, it needs to be of the Mock object type, not the BaseClass. @GenerateMocks(MockSpec<ITransactionRepository>(as: #MockTransactionRepository), ) void main() { …. ITransactionRepository baseObject = MockTransactionRepository(); // wrong MockTransactionRepository mockObject = MockTransactionRepository(); // right when(baseObject.method(any)); // results in compile error when(mockObject.method(any)); // OK … } Source: https://github.com/dart-lang/mockito/issues/364
floatingActionButton property on Scaffold widget do not need to take FloatingActionButton widget necessarily. It can also take Column or Row widgets. Below, I’m sharing my Scaffold widget example with two floating action buttons on top of each other. return Scaffold( appBar: AppBar( title: Text(“”), ), body: SingleChildScrollView(/*…*/), floatingActionButton: Column( mainAxisAlignment: MainAxisAlignment.end, children: [ FloatingActionButton( child: … Read more
You can specify custom surface size by using WidgetTester The following code will run a test with a screen size of 42×42 import ‘package:flutter/widgets.dart’; import ‘package:flutter_test/flutter_test.dart’; void main() { testWidgets(“foo”, (tester) async { tester.binding.window.physicalSizeTestValue = Size(42, 42); // resets the screen to its original size after the test end addTearDown(tester.binding.window.clearPhysicalSizeTestValue); // TODO: do something }); … Read more
This issue may happen when you implement a method you want to mock instead of letting Mockito do that. This code below will return Bad state: Mock method was not called within when(). Was a real method called?: class MockFirebaseAuth extends Mock implements FirebaseAuth { FirebaseUser _currentUser; MockFirebaseAuth(this._currentUser); // This method causes the issue. Future<FirebaseUser> … Read more
Yes, you can use find.descendant and Element.ancestorWidgetOfExactType. Examples: // Finds a RichText widget that a descendant (child/grand-child/etc) of a // tab widget with text “Tab 1” find.descendant(of: find.text(‘Tab 1’), matching: find.byType(RichText)); // Finds a parent widget of type MyParentWidget. tester.element(find.byType(MyChildWidget)) .ancestorWidgetOfExactType(MyParentWidget);
While what Danny said is correct and works, you can also create a mocked NavigatorObserver to avoid any extra boilerplate: import ‘package:mockito/mockito.dart’; class MockNavigatorObserver extends Mock implements NavigatorObserver {} That would translate to your test case as follows: void main() { testWidgets(‘Button is present and triggers navigation after tapped’, (WidgetTester tester) async { final mockObserver … Read more
Add C:\Program Files\Git\bin\git.exe;C:\Program Files\Git\cmd;C:\Windows\System32 to your PATH variable Do not create new variable for git but add them as I did one after another separating them by ;
As Günter said, the clock package, maintained by the Dart team, provides a very neat way to achieve this. Normal usage: import ‘package:clock/clock.dart’; void main() { // prints current date and time print(clock.now()); } Overriding the current time: import ‘package:clock/clock.dart’; void main() { withClock( Clock.fixed(DateTime(2000)), () { // always prints 2000-01-01 00:00:00. print(clock.now()); }, ); … Read more
This should do what you want: expect(() => operations.lookupOrderDetails(), throwsA(isA<MyCustErr>())); if you just want to check for exception check this answer: