小编Rya*_*yan的帖子

我正在监听发布者的更改，然后在管道中异步获取一些数据并使用结果更新视图。但是，我不确定如何使其可测试。我怎样才能最好地等到期望得到满足？

看法

struct ContentView: View {
    @StateObject var viewModel = ContentViewModel()

    var body: some View {
        NavigationView {
            List(viewModel.results, id: \.self) {
                Text($0)
            }
            .searchable(text: $viewModel.searchText)
        }
    }
}

视图模型

final class ContentViewModel: ObservableObject {
    @Published var searchText: String = ""
    @Published var results: [String] = []
    private var cancellables = Set<AnyCancellable>()

    init() {
        observeSearchText()
    }

    func observeSearchText() {
        $searchText
            .dropFirst()
            .debounce(for: 0.8, scheduler: DispatchQueue.main)
            .sink { _ in
                Task {
                    await self.fetchResults()
                }
            }.store(in: &cancellables)
    }

    private func fetchResults() …