我想為視圖控制器中的委托方法之一的方法撰寫單元測驗用例。我為 VC 創建了一個單元測驗用例類，并嘗試為該方法撰寫單元測驗。
這是在VC中實作的方法。我們如何撰寫單元測驗用例？
extension DownloadBaseViewController:EMPDecisionTreeCoordinatorDelegate {
func decisionEmptyTreeFeedbackButtonTapped() {
if let feedbackNavVc = storyboard?.instantiateViewController(identifier: "PremiumFeedbackNavViewController") as? PremiumCustomNavigationController {
if let feedbackVc = feedbackNavVc.children.first as? PremiumFeedbackViewController {
feedbackVc.id = self.fileDetails?.id
self.decesiontreeCoordinator!.rootViewController.present(feedbackNavVc, animated: true, completion: nil)
}
}
}
}
為 VC 創建了一個單元測驗類，并嘗試無法正確撰寫它，遵循一些未找到委托方法的教程。
import XCTest
class DownloadBaseViewControllerTests: XCTestCase {
var downloadBaseViewController: DownloadBaseViewController!
func testDecisionEmptyTreeFeedbackButtonTapped() throws {
let feedbackVCNavigation = downloadBaseViewController.decisionEmptyTreeFeedbackButtonTapped
XCTAssertNotNil(feedbackVCNavigation, "Download base view controller contains feedback view controller and succesfully able to navigate")
///Test case Build succeded but this is not the way to test it properly need heads up on this.
}
override func setUpWithError() throws {
// Put setup code here. This method is called before the invocation of each test method in the class.
}
}
uj5u.com熱心網友回復：
重構DownloadBaseViewController您的應用程式中的 ，以便您可以模擬依賴項：
extension DownloadBaseViewController:EMPDecisionTreeCoordinatorDelegate {
// Add this variable in DownloadBaseViewController
lazy var presentingController: ViewControllerPresenting? = self.decesiontreeCoordinator?.rootViewController
func decisionEmptyTreeFeedbackButtonTapped() {
if let feedbackNavVc = storyboard?.instantiateViewController(identifier: "PremiumFeedbackNavViewController") as? PremiumCustomNavigationController {
if let feedbackVc = feedbackNavVc.children.first as? PremiumFeedbackViewController {
feedbackVc.id = self.fileDetails?.id
self.presentingController?.present(feedbackNavVc, animated: true, completion: nil)
}
}
}
}
// You need this to mock the foreign dependency on UIViewController
protocol ViewControllerPresenting: AnyObject {
func present(_ viewControllerToPresent: UIViewController,
animated flag: Bool,
completion: (() -> Void)?)
}
extension UIViewController: ViewControllerPresenting {}
在測驗中，您注入了一個 Spy 物件，它將幫助您驗證正確的行為：
final class UIViewControllerSpy: ViewControllerPresenting {
var viewControllerToPresent: UIViewController!
func present(_ viewControllerToPresent: UIViewController,
animated flag: Bool,
completion: (() -> Void)? = nil) {
self.viewControllerToPresent = viewControllerToPresent
}
}
class DownloadBaseViewControllerTests: XCTestCase {
var downloadBaseViewController: DownloadBaseViewController! = DownloadBaseViewController()
func testDecisionEmptyTreeFeedbackButtonTapped() throws {
// Given
let spyController = UIViewControllerSpy()
downloadBaseViewController.presentingController = spyController
// When
downloadBaseViewController.decisionEmptyTreeFeedbackButtonTapped()
// Then
let presentedController = spyController.viewControllerToPresent as? PremiumFeedbackViewController
XCTAssertNotNil(presentedController, "Download base view controller contains feedback view controller and succesfully able to navigate")
}
}
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