MethodChannel to mock ResultType.noAppToOpen in test

Hello,

Currently I am trying to mock the ResultType.noAppToOpen in the test as shown below.

So I did the method channel below. const MethodChannel('open_file').setMockMethodCallHandler(methodCall) { return OpenResult(message: 'No APP found to open this file.' , type: ResultType.noAppToOpen);

But I am unable to have the desired return of ResultType.noAppToOpen in my test. Am I doing the methodChannel wrongly for this since there is filePath inside OpenFile.open(filePath) ? Or is the methodChannel not working for this. Thank you.

[mixinDennisBarzanoffMixin]

just make another wrapper service and mock it, that would work regardless of how this library is written. I did this in my case

[ValentinVignal]

Or and idea would be to not use static methods anymore as they are not mockable, you could do something like that:

class OpenFile {
  OpenFile._();

  static OpenFile _instance = OpenFile._();

  static OpenFile get instance => _instance;

  @visibleForTesting
  static OpenFile set instance(OpenFile instance) {
    // So we can give a mock in the tests
    _instance = instance;
  }
  
  // Not a static method anymore.
  Future<OpenResult> open(/* ... */) {/* ... */}  
}

And instead of do

OpenFile.open();

it will be

OpenFile.instance.open();