Confirm purchase with retry

confirmPurchase.swift

extension XCUIApplication {
    
    /// Confirms buying of a subscription purchase and retries once if the user is not authorized.
    private func confirmBuyingOfSubscription(signInRequired: Bool = true,
                                             account: AppStoreConnectService.AppStoreSandboxUser,
                                             retryCount: Int,
                                             _ block: () -> ()) {
        block()
        
        if signInRequired {
            signInToiTunesSandboxAccountAndBuy(account: account)
        }
        
        let springboardApp = XCUIApplication.getSpringboardApp()
        
        let subTermsAlert = springboardApp.alerts["Subscription Terms"].waitForIt()
        subTermsAlert.buttons["Continue"].waitForIt().waitToBeHittable().tap()
        
        let confirmSubAlert = springboardApp.alerts["Confirm Subscription"].waitForIt()
        confirmSubAlert.buttons["OK"].waitForIt().waitToBeHittable().tap()
        
        // Try to retry if Apple's sandbox environment is acting out.
        let notAuthorizedAlert = springboardApp.alerts["You are not authorized to make purchases of this InApp in Sandbox at this time."]
        if retryCount == 0, notAuthorizedAlert.waitForExistence(timeout: 30) {
            notAuthorizedAlert.buttons["OK"].waitForIt().waitToBeHittable().tap()
            // Sign out of the sandbox account.
            XCUIApplication.launchSettingsApp().signOutOfiTunesSandboxAccount()
            // Switch back to app and try again.
            activate()
            confirmBuyingOfSubscription(account: account, retryCount: retryCount + 1, block)
            return
        }
        
        let subscribedAlert = springboardApp.alerts["You’re all set"].waitForIt()
        subscribedAlert.buttons["OK"].waitForIt().waitToBeHittable().tap()
    }
    
}