How to test (unit test) a BehaviorSubject in Flutter?

I would like to test the controllers stream that manages my form. Here I am trying to test my email controller which is connected to a validator. I managed to...

Flutter: How to unit testing moor/drift?

I already implementation of Drift for local storage, and want make it testable function. But I get stack and idk how to fix it the unit test. HomeDao <pre c...

How to test a method in a Stateful Widget?

I'm learning how to test a method in a Stateful Widget. Now I'm concerned with unit testing. This is my code (I cut the useless part): <pre><code>class Counter ext...

How to extract Left or Right easily from Either type in Dart (Dartz)

I am looking to extract a value easily from a method that return a type <code>Either&lt;Exception, Object&gt;</code>. I am doing some tests but unable to test...

Unit tests running in parallel in flutter when using GetIt

I am writing an flutter App and I am using GetIt for dependency injection. When I write unit tests, I do something like this: <pre class="lang-dart prettypr...

How to unit test bloc with network relative repostitory?

I create a bloc call <code>Authentication</code>. This bloc emit two state call <code>Autenticated</code> and <code>UnAuthenticated</code> base on <code>Authentication...

LateInitializationError: Field [email protected]9075166 has not been initialized

It's my first time testing a flutter app. I tried to pump my <code>HomeView</code> with this test code: <pre><code>void main() { group('Home Test', () { _pum...

Flutter secure storage unit test

Hey as a part of project I would like to test my classes like the one below but I have a little problem. Impossible for me to test, I always encounter the same errors...

Flutter: package:shared_preferences/shared_preferences.dart: Failed assertion: line 33 pos 16: key.startsWith(_prefix): is not true

I am running some unit tests on shared preferences. I was making a helper class so that we don't have to write the same code over and over again. Whatever I tr...

Dart tests: excpect stream to emit nothing

I want to check that some <code>Stream</code> (e.g. bloc) emits nothing during unit test. <strong>More detailed description:</strong> I use <a href="https://pub...

Flutter test find by sub text

Is it possible to assert a test if the certain text is found either as full string match or as a sub string of other text? I want the following test to pass as...

What is the right expectation for a return type of Query&lt;T&gt; for unit testing?

For a stream matcher, we can use <code>emits(expectedData)</code> to expect what a stream returns. And for Future, we can use <code>completion(expectedData)</code>, Bu...

How to get result of rootBundle.loadString(key) during flutter widget test?

I want to read a file from an asset during widget build with help of <strong>rootBundle</strong> but when I tried to call <em><strong>rootBundle.loadString('assets/myJ...

Flutter widget unittests throws No Directionality widget found

i try to unittest a small own widget: <pre><code>testWidgets('MyWidget has a title and message', (WidgetTester tester) async { var text = "abc"; var label = "...

Mockito mocked function returned Null

I got stuck on making the test using Mockito. I'm trying to implement Clean Architect to the Flutter tutorial <a href="https://docs.flutter.dev/get-started/codelab" re...