Hello! I'm working on migration a project to Swift 6 and encountering the following error in tests: "Call to main actor-isolated initializer 'init(viewModel:)' in a synchronous nonisolated context".
final class MicOnboardingViewTests: XCTestCase, @unchecked Sendable {
var sut: UIViewController!
var presenter: MicOnboardingPresenter!
override func setUp() {
super.setUp()
// ...
// ERROR: Call to main actor-isolated initializer 'init(viewModel: viewModel)' in a synchronous nonisolated context
presenter = MicOnboardingPresenter(viewModel: viewModel)
}
// ...
}
The issue is that I have a Presenter class that conforms to the MicOnboardingPresentationLogic protocol, which is marked as @MainActor and Sendable:
@MainActor
protocol MicOnboardingPresentationLogic: Sendable {
func presentFetchedData(model: MicOnboardingModels.FetchData)
}
final class MicOnboardingPresenter: MicOnboardingPresentationLogic {
// MARK: - Properties
private var viewModel: MicOnboardingViewModel
// MARK: - Initialization
init(viewModel: MicOnboardingViewModel) {
self.viewModel = viewModel
}
// MARK: - MicOnboardingPresentationLogic
func presentFetchedData(model: MicOnboardingModels.FetchData) {
// .. //
}
}
I understand that the issue is due to setUp() and tearDown() being synchronous in a nonisolated context.
My question is: how should cases like this be handled when I have an entity marked as MainActor and I need to create it in the setUp() of the test? Currently, all tests are broken, and I don’t yet know a suitable solution for this situation.