如何对特定于区域设置的本地通知进行单元测试

Question

我刚刚在我的应用中添加了本地通知。仅当应用区域设置regionCode（即Locale.current.regionCode）为“ US”或“ CA”时，才触发这些通知。我对语言环境不感兴趣language。

我还将要编写补充的测试用例，但是一旦我知道如何编写一个测试用例，其他的就自然而然地遵循了。

因此，我的问题是：如何将Locale注入测试中（请参阅参考资料testSuccessfulNotificationDelivery()）？

LocalNotificationTests.swift：

class LocalNotificationTests: XCTestCase {

    let notification1 = LocalNotification(toTriggerInSeconds: 5)
    let notification2 = LocalNotification(toTriggerInSeconds: 6)

    // This object manages LocalNotifications 
    // by building them into UNUserNotifications
    // and then scheduling them using UNUserNotificationCenter.
    let notificationManager = NotificationManager()

    func testSuccessfulNotificationDelivery() {

        // setup locale and use it for testing, somehow
        let  = Locale(identifier: "en_CA")

        // The answer to my question would go here. 
        // (Inject Locale into the test, somehow?)

        notificationManager.schedule(notifications: [notification1, notification2], 
                                     withRegionCode: .regionCode)

        let expectation = self.expectation(description: "notification delivery")

        var deliveredNotifications: [UNNotification]?

        UNUserNotificationCenter.current().getDeliveredNotifications {
            deliveredNotifications = $0
            expectation.fulfill()
        }

        waitForExpectations(timeout: 10, handler: nil)

        XCTAssertEqual(deliveredNotifications?.count, 2) 
    }
}

假设默认setup()和tearDown()。

Answer 1

class LocalNotificationTests: XCTestCase {

let notification1 = LocalNotification(toTriggerInSeconds: 5)
let notification2 = LocalNotification(toTriggerInSeconds: 6)

// This object manages LocalNotifications 
// by building them into UNUserNotifications
// and then scheduling them using UNUserNotificationCenter.
let notificationManager = NotificationManager()

func testSuccessfulCanadaNotificationDelivery() {
    let canadaLocale = Locale("en_CA")
    XCTAssertTrue(notificationDelivered(with: canadaLocale))
}

func testNotificationDeliveryFailure() {
    let notCanadaOrUs = Locale("ru_RU")
    XCTAssertFalse(notificationDelivered(with: notCanadaOrUs))
}


private func notificationDelivered(with locale: Locale) -> Bool {

    // The answer to my question would go here. 
    // (Inject Locale into the test, somehow?)

    notificationManager.schedule(notifications: [notification1, notification2], 
                                 withRegionCode: locale.regionCode)

    let expectation = self.expectation(description: "notification delivery")

    var deliveredNotifications: [UNNotification]?

    UNUserNotificationCenter.current().getDeliveredNotifications {
        deliveredNotifications = $0
        expectation.fulfill()
    }

    waitForExpectations(timeout: 10, handler: nil)

    return (deliveredNotifications?.count ?? 0) == 2
}

你能做这样的事情吗？