How to use testTraitsWithView method of CancellingWKWebViewNavigationDelegate class

...680      "iphoneMax": .image(on: .iPhoneXsMax)681    ])682    #endif683  }684  func testTraitsWithView() {685    #if os(iOS)686    if #available(iOS 11.0, *) {687      let label = UILabel()688      label.font = .preferredFont(forTextStyle: .title1)689      label.adjustsFontForContentSizeCategory = true690      label.text = "What's the point?"691      allContentSizes.forEach { name, contentSize in692        assertSnapshot(693          matching: label,694          as: .image(traits: .init(preferredContentSizeCategory: contentSize)),695          named: "label-\(name)"696        )697      }698    }699    #endif700  }701  func testTraitsWithViewController() {702    #if os(iOS)703    let label = UILabel()704    label.font = .preferredFont(forTextStyle: .title1)705    label.adjustsFontForContentSizeCategory = true706    label.text = "What's the point?"707    let viewController = UIViewController()708    viewController.view.addSubview(label)709    label.translatesAutoresizingMaskIntoConstraints = false710    NSLayoutConstraint.activate([711      label.leadingAnchor.constraint(equalTo: viewController.view.layoutMarginsGuide.leadingAnchor),712      label.topAnchor.constraint(equalTo: viewController.view.layoutMarginsGuide.topAnchor),713      label.trailingAnchor.constraint(equalTo: viewController.view.layoutMarginsGuide.trailingAnchor)714    ])715    allContentSizes.forEach { name, contentSize in716      assertSnapshot(717        matching: viewController,718        as: .recursiveDescription(on: .iPhoneSe, traits: .init(preferredContentSizeCategory: contentSize)),719        named: "label-\(name)"720      )721    }722    #endif723  }724  func testUIBezierPath() {725    #if os(iOS) || os(tvOS)726    let path = UIBezierPath.heart727    let osName: String728    #if os(iOS)729    osName = "iOS"730    #elseif os(tvOS)731    osName = "tvOS"732    #endif733    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {734      assertSnapshot(matching: path, as: .image, named: osName)735    }736    if #available(iOS 11.0, tvOS 11.0, *) {737      assertSnapshot(matching: path, as: .elementsDescription, named: osName)738    }739    #endif740  }741  func testUIView() {742    #if os(iOS)743    let view = UIButton(type: .contactAdd)744    assertSnapshot(matching: view, as: .image)745    assertSnapshot(matching: view, as: .recursiveDescription)746    #endif747  }748  func testUIViewControllerLifeCycle() {749    #if os(iOS)750    class ViewController: UIViewController {751      let viewDidLoadExpectation: XCTestExpectation752      let viewWillAppearExpectation: XCTestExpectation753      let viewDidAppearExpectation: XCTestExpectation754      let viewWillDisappearExpectation: XCTestExpectation755      let viewDidDisappearExpectation: XCTestExpectation756      init(viewDidLoadExpectation: XCTestExpectation,757           viewWillAppearExpectation: XCTestExpectation,758           viewDidAppearExpectation: XCTestExpectation,759           viewWillDisappearExpectation: XCTestExpectation,760           viewDidDisappearExpectation: XCTestExpectation){761        self.viewDidLoadExpectation = viewDidLoadExpectation762        self.viewWillAppearExpectation = viewWillAppearExpectation763        self.viewDidAppearExpectation = viewDidAppearExpectation764        self.viewWillDisappearExpectation = viewWillDisappearExpectation765        self.viewDidDisappearExpectation = viewDidDisappearExpectation766        super.init(nibName: nil, bundle: nil)767      }768      required init?(coder: NSCoder) {769        fatalError("init(coder:) has not been implemented")770      }771      override func viewDidLoad() {772        super.viewDidLoad()773        viewDidLoadExpectation.fulfill()774      }775      override func viewWillAppear(_ animated: Bool) {776        super.viewWillAppear(animated)777        viewWillAppearExpectation.fulfill()778      }779      override func viewDidAppear(_ animated: Bool) {780        super.viewDidAppear(animated)781        viewDidAppearExpectation.fulfill()782      }783      override func viewWillDisappear(_ animated: Bool) {784        super.viewWillDisappear(animated)785        viewWillDisappearExpectation.fulfill()786      }787      override func viewDidDisappear(_ animated: Bool) {788        super.viewDidDisappear(animated)789        viewDidDisappearExpectation.fulfill()790      }791    }792    let viewDidLoadExpectation = expectation(description: "viewDidLoad")793    let viewWillAppearExpectation = expectation(description: "viewWillAppear")794    let viewDidAppearExpectation = expectation(description: "viewDidAppear")795    let viewWillDisappearExpectation = expectation(description: "viewWillDisappear")796    let viewDidDisappearExpectation = expectation(description: "viewDidDisappear")797    viewWillAppearExpectation.expectedFulfillmentCount = 4798    viewDidAppearExpectation.expectedFulfillmentCount = 4799    viewWillDisappearExpectation.expectedFulfillmentCount = 4800    viewDidDisappearExpectation.expectedFulfillmentCount = 4801    let viewController = ViewController(802      viewDidLoadExpectation: viewDidLoadExpectation,803      viewWillAppearExpectation: viewWillAppearExpectation,804      viewDidAppearExpectation: viewDidAppearExpectation,805      viewWillDisappearExpectation: viewWillDisappearExpectation,806      viewDidDisappearExpectation: viewDidDisappearExpectation807    )808    assertSnapshot(matching: viewController, as: .image)809    assertSnapshot(matching: viewController, as: .image)810    wait(for: [811      viewDidLoadExpectation,812      viewWillAppearExpectation,813      viewDidAppearExpectation,814      viewWillDisappearExpectation,815      viewDidDisappearExpectation,816    ], timeout: 1.0, enforceOrder: true)817    #endif818  }819  func testCALayer() {820    #if os(iOS)821    let layer = CALayer()822    layer.frame = CGRect(x: 0, y: 0, width: 100, height: 100)823    layer.backgroundColor = UIColor.red.cgColor824    layer.borderWidth = 4.0825    layer.borderColor = UIColor.black.cgColor826    assertSnapshot(matching: layer, as: .image)827    #endif828  }829  func testCALayerWithGradient() {830    #if os(iOS)831    let baseLayer = CALayer()832    baseLayer.frame = CGRect(x: 0, y: 0, width: 100, height: 100)833    let gradientLayer = CAGradientLayer()834    gradientLayer.colors = [UIColor.red.cgColor, UIColor.yellow.cgColor]835    gradientLayer.frame = baseLayer.frame836    baseLayer.addSublayer(gradientLayer)837    assertSnapshot(matching: baseLayer, as: .image)838    #endif839  }840  func testViewControllerHierarchy() {841    #if os(iOS)842    let page = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal)843    page.setViewControllers([UIViewController()], direction: .forward, animated: false)844    let tab = UITabBarController()845    tab.viewControllers = [846      UINavigationController(rootViewController: page),847      UINavigationController(rootViewController: UIViewController()),848      UINavigationController(rootViewController: UIViewController()),849      UINavigationController(rootViewController: UIViewController()),850      UINavigationController(rootViewController: UIViewController())851    ]852    assertSnapshot(matching: tab, as: .hierarchy)853    #endif854  }855  func testURLRequest() {856    var get = URLRequest(url: URL(string: "https://www.pointfree.co/")!)857    get.addValue("pf_session={}", forHTTPHeaderField: "Cookie")858    get.addValue("text/html", forHTTPHeaderField: "Accept")859    get.addValue("application/json", forHTTPHeaderField: "Content-Type")860    assertSnapshot(matching: get, as: .raw, named: "get")861    assertSnapshot(matching: get, as: .curl, named: "get-curl")862    var getWithQuery = URLRequest(url: URL(string: "https://www.pointfree.co?key_2=value_2&key_1=value_1&key_3=value_3")!)863    getWithQuery.addValue("pf_session={}", forHTTPHeaderField: "Cookie")864    getWithQuery.addValue("text/html", forHTTPHeaderField: "Accept")865    getWithQuery.addValue("application/json", forHTTPHeaderField: "Content-Type")866    assertSnapshot(matching: getWithQuery, as: .raw, named: "get-with-query")867    assertSnapshot(matching: getWithQuery, as: .curl, named: "get-with-query-curl")868    var post = URLRequest(url: URL(string: "https://www.pointfree.co/subscribe")!)869    post.httpMethod = "POST"870    post.addValue("pf_session={\"user_id\":\"0\"}", forHTTPHeaderField: "Cookie")871    post.addValue("text/html", forHTTPHeaderField: "Accept")872    post.httpBody = Data("pricing[billing]=monthly&pricing[lane]=individual".utf8)873    assertSnapshot(matching: post, as: .raw, named: "post")874    assertSnapshot(matching: post, as: .curl, named: "post-curl")875    876    var postWithJSON = URLRequest(url: URL(string: "http://dummy.restapiexample.com/api/v1/create")!)877    postWithJSON.httpMethod = "POST"878    postWithJSON.addValue("application/json", forHTTPHeaderField: "Content-Type")879    postWithJSON.addValue("application/json", forHTTPHeaderField: "Accept")880    postWithJSON.httpBody = Data("{\"name\":\"tammy134235345235\", \"salary\":0, \"age\":\"tammy133\"}".utf8)881    assertSnapshot(matching: postWithJSON, as: .raw, named: "post-with-json")882    assertSnapshot(matching: postWithJSON, as: .curl, named: "post-with-json-curl")883    var head = URLRequest(url: URL(string: "https://www.pointfree.co/")!)884    head.httpMethod = "HEAD"885    head.addValue("pf_session={}", forHTTPHeaderField: "Cookie")886    assertSnapshot(matching: head, as: .raw, named: "head")887    assertSnapshot(matching: head, as: .curl, named: "head-curl")888    post = URLRequest(url: URL(string: "https://www.pointfree.co/subscribe")!)889    post.httpMethod = "POST"890    post.addValue("pf_session={\"user_id\":\"0\"}", forHTTPHeaderField: "Cookie")891    post.addValue("application/json", forHTTPHeaderField: "Accept")892    post.httpBody = Data("""893                         {"pricing": {"lane": "individual","billing": "monthly"}}894                         """.utf8)895    _assertInlineSnapshot(matching: post, as: .raw(pretty: true), with: """896    POST https://www.pointfree.co/subscribe897    Accept: application/json898    Cookie: pf_session={"user_id":"0"}899    900    {901      "pricing" : {902        "billing" : "monthly",903        "lane" : "individual"904      }905    }906    """)907  }908  func testWebView() throws {909    #if os(iOS) || os(macOS)910    let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)911      .deletingLastPathComponent()912      .appendingPathComponent("__Fixtures__/pointfree.html")913    let html = try String(contentsOf: fixtureUrl)914    let webView = WKWebView()915    webView.loadHTMLString(html, baseURL: nil)916    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {917      assertSnapshot(918        matching: webView,919        as: .image(size: .init(width: 800, height: 600)),920        named: platform921      )922    }923    #endif924  }925  func testViewWithZeroHeightOrWidth() {926    #if os(iOS) || os(tvOS)927    var rect = CGRect(x: 0, y: 0, width: 350, height: 0)928    var view = UIView(frame: rect)929    view.backgroundColor = .red930    assertSnapshot(matching: view, as: .image, named: "noHeight")931    932    rect = CGRect(x: 0, y: 0, width: 0, height: 350)933    view = UIView(frame: rect)934    view.backgroundColor = .green935    assertSnapshot(matching: view, as: .image, named: "noWidth")936    rect = CGRect(x: 0, y: 0, width: 0, height: 0)937    view = UIView(frame: rect)938    view.backgroundColor = .blue939    assertSnapshot(matching: view, as: .image, named: "noWidth.noHeight")940    #endif941  }942  func testEmbeddedWebView() throws {943    #if os(iOS)944    let label = UILabel()945    label.text = "Hello, Blob!"946    let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)947      .deletingLastPathComponent()948      .appendingPathComponent("__Fixtures__/pointfree.html")949    let html = try String(contentsOf: fixtureUrl)950    let webView = WKWebView()951    webView.loadHTMLString(html, baseURL: nil)952    webView.isHidden = true953    let stackView = UIStackView(arrangedSubviews: [label, webView])954    stackView.axis = .vertical955    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {956      assertSnapshot(957        matching: stackView,958        as: .image(size: .init(width: 800, height: 600)),959        named: platform960      )961    }962    #endif963  }964  #if os(iOS) || os(macOS)965  final class ManipulatingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {966    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {967      webView.evaluateJavaScript("document.body.children[0].classList.remove(\"hero\")") // Change layout968    }969  }970  func testWebViewWithManipulatingNavigationDelegate() throws {971    let manipulatingWKWebViewNavigationDelegate = ManipulatingWKWebViewNavigationDelegate()972    let webView = WKWebView()973    webView.navigationDelegate = manipulatingWKWebViewNavigationDelegate974    let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)975      .deletingLastPathComponent()976      .appendingPathComponent("__Fixtures__/pointfree.html")977    let html = try String(contentsOf: fixtureUrl)978    webView.loadHTMLString(html, baseURL: nil)979    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {980      assertSnapshot(981        matching: webView,982        as: .image(size: .init(width: 800, height: 600)),983        named: platform984      )985    }986    _ = manipulatingWKWebViewNavigationDelegate987  }988  #if os(iOS) || os(macOS)989  func testWebViewWithRealUrl() throws {990    let manipulatingWKWebViewNavigationDelegate = ManipulatingWKWebViewNavigationDelegate()991    let webView = WKWebView()992    webView.navigationDelegate = manipulatingWKWebViewNavigationDelegate993    webView.load(URLRequest(url: URL(string: "https://www.pointfree.co")!))994    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {995      assertSnapshot(996        matching: webView,997        as: .image(size: .init(width: 800, height: 600)),998        named: platform999      )1000    }1001    _ = manipulatingWKWebViewNavigationDelegate1002  }1003  #endif1004  final class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {1005    func webView(1006      _ webView: WKWebView,1007      decidePolicyFor navigationAction: WKNavigationAction,1008      decisionHandler: @escaping (WKNavigationActionPolicy) -> Void1009    ) {1010      decisionHandler(.cancel)1011    }1012  }1013  func testWebViewWithCancellingNavigationDelegate() throws {1014    let cancellingWKWebViewNavigationDelegate = CancellingWKWebViewNavigationDelegate()1015    let webView = WKWebView()1016    webView.navigationDelegate = cancellingWKWebViewNavigationDelegate1017    let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)1018      .deletingLastPathComponent()1019      .appendingPathComponent("__Fixtures__/pointfree.html")1020    let html = try String(contentsOf: fixtureUrl)1021    webView.loadHTMLString(html, baseURL: nil)1022    if !ProcessInfo.processInfo.environment.keys.contains("GITHUB_WORKFLOW") {1023      assertSnapshot(1024        matching: webView,1025        as: .image(size: .init(width: 800, height: 600)),1026        named: platform1027      )1028    }1029    _ = cancellingWKWebViewNavigationDelegate1030  }1031  #endif1032  @available(iOS 13.0, *)1033  func testSwiftUIView_iOS() {1034    #if os(iOS)1035    struct MyView: SwiftUI.View {1036      var body: some SwiftUI.View {1037        HStack {1038          Image(systemName: "checkmark.circle.fill")1039            Text("Checked").fixedSize()1040        }1041        .padding(5)1042        .background(RoundedRectangle(cornerRadius: 5.0).fill(Color.blue))1043        .padding(10)1044      }1045    }1046    let view = MyView().background(Color.yellow)1047    assertSnapshot(matching: view, as: .image(traits: .init(userInterfaceStyle: .light)))1048    assertSnapshot(matching: view, as: .image(layout: .sizeThatFits, traits: .init(userInterfaceStyle: .light)), named: "size-that-fits")1049    assertSnapshot(matching: view, as: .image(layout: .fixed(width: 200.0, height: 100.0), traits: .init(userInterfaceStyle: .light)), named: "fixed")1050    assertSnapshot(matching: view, as: .image(layout: .device(config: .iPhoneSe), traits: .init(userInterfaceStyle: .light)), named: "device")1051    #endif1052  }1053  @available(tvOS 13.0, *)1054  func testSwiftUIView_tvOS() {1055    #if os(tvOS)1056    struct MyView: SwiftUI.View {1057      var body: some SwiftUI.View {1058        HStack {1059          Image(systemName: "checkmark.circle.fill")1060            Text("Checked").fixedSize()1061        }1062        .padding(5)1063        .background(RoundedRectangle(cornerRadius: 5.0).fill(Color.blue))1064        .padding(10)1065      }1066    }1067    let view = MyView().background(Color.yellow)1068    assertSnapshot(matching: view, as: .image())1069    assertSnapshot(matching: view, as: .image(layout: .sizeThatFits), named: "size-that-fits")1070    assertSnapshot(matching: view, as: .image(layout: .fixed(width: 300.0, height: 100.0)), named: "fixed")1071    assertSnapshot(matching: view, as: .image(layout: .device(config: .tv)), named: "device")1072    #endif1073  }1074  @available(*, deprecated)1075  func testIsRecordingProxy() {1076    SnapshotTesting.record = true1077    XCTAssertEqual(isRecording, true)1078    SnapshotTesting.record = false1079    XCTAssertEqual(isRecording, false)1080  }1081}1082#if os(iOS)1083private let allContentSizes =1084  [1085    "extra-small": UIContentSizeCategory.extraSmall,1086    "small": .small,1087    "medium": .medium,1088    "large": .large,1089    "extra-large": .extraLarge,1090    "extra-extra-large": .extraExtraLarge,1091    "extra-extra-extra-large": .extraExtraExtraLarge,1092    "accessibility-medium": .accessibilityMedium,1093    "accessibility-large": .accessibilityLarge,1094    "accessibility-extra-large": .accessibilityExtraLarge,1095    "accessibility-extra-extra-large": .accessibilityExtraExtraLarge,1096    "accessibility-extra-extra-extra-large": .accessibilityExtraExtraExtraLarge,1097    ]1098#endif1099#if os(Linux) || os(Windows)1100extension SnapshotTestingTests {1101  static var allTests : [(String, (SnapshotTestingTests) -> () throws -> Void)] {1102    return [1103      ("testAny", testAny),1104      ("testAnySnapshotStringConvertible", testAnySnapshotStringConvertible),1105      ("testAutolayout", testAutolayout),1106      ("testDeterministicDictionaryAndSetSnapshots", testDeterministicDictionaryAndSetSnapshots),1107      ("testEncodable", testEncodable),1108      ("testMixedViews", testMixedViews),1109      ("testMultipleSnapshots", testMultipleSnapshots),1110      ("testNamedAssertion", testNamedAssertion),1111      ("testPrecision", testPrecision),1112      ("testSCNView", testSCNView),1113      ("testSKView", testSKView),1114      ("testTableViewController", testTableViewController),1115      ("testTraits", testTraits),1116      ("testTraitsEmbeddedInTabNavigation", testTraitsEmbeddedInTabNavigation),1117      ("testTraitsWithView", testTraitsWithView),1118      ("testUIView", testUIView),1119      ("testURLRequest", testURLRequest),1120      ("testWebView", testWebView),1121    ]1122  }1123}1124#endif...

1import UIKit2import WebKit3class ViewController: UIViewController {4    override func viewDidLoad() {5        super.viewDidLoad()6        webView.navigationDelegate = CancellingWKWebViewNavigationDelegate()7    }8}9import UIKit10import WebKit11class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {12    func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {13        testTraitsWithView(webView)14    }15    func testTraitsWithView(_ view: UIView) {16        for subview in view.subviews {17            if let webView = subview as? WKWebView {18                print("WKWebView found")19            }20            testTraitsWithView(subview)21        }22    }23}

1let delegate = CancellingWKWebViewNavigationDelegate()2let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())3delegate.testTraitsWithView(webView)4let delegate = CancellingWKWebViewNavigationDelegate()5let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())6delegate.testTraitsWithView(webView)7let delegate = CancellingWKWebViewNavigationDelegate()8let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())9delegate.testTraitsWithView(webView)10let delegate = CancellingWKWebViewNavigationDelegate()11let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())12delegate.testTraitsWithView(webView)13let delegate = CancellingWKWebViewNavigationDelegate()14let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())15delegate.testTraitsWithView(webView)16let delegate = CancellingWKWebViewNavigationDelegate()17let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())18delegate.testTraitsWithView(webView)19let delegate = CancellingWKWebViewNavigationDelegate()20let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())21delegate.testTraitsWithView(webView)22let delegate = CancellingWKWebViewNavigationDelegate()23let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())24delegate.testTraitsWithView(webView)

1func testTraitsWithView() {2    let webView = WKWebView()3    let delegate = CancellingWKWebViewNavigationDelegate()4    let traitCollection = UITraitCollection(traitsFrom: [UITraitCollection(horizontalSizeClass: .regular), UITraitCollection(verticalSizeClass: .regular)])5    delegate.testTraitsWithView(traitCollection, webView)6}7import UIKit8import WebKit9class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {10    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {11        decisionHandler(.cancel)12    }13    func testTraitsWithView(_ traitCollection: UITraitCollection, _ view: UIView) {14        traitCollectionDidChange(traitCollection)15        view.traitCollectionDidChange(traitCollection)16    }17}18import XCTest19@testable import CancellingWKWebViewNavigationDelegate20class CancellingWKWebViewNavigationDelegateTests: XCTestCase {21    func testTraitsWithView() {22        testTraitsWithView()23    }24}25This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details

1import XCTest2import WebKit3class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {4    init(view: UIView) {5    }6    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {7        view.testTraitsWithView()8    }9}10class ViewController: UIViewController, WKNavigationDelegate {11    override func viewDidLoad() {12        super.viewDidLoad()13        webView = WKWebView()14        webView.navigationDelegate = CancellingWKWebViewNavigationDelegate(view: view)15    }16}17import XCTest18import WebKit19class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {20    init(view: UIView) {21    }22    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {23        view.testTraitsWithView()24    }25}26class ViewController: UIViewController, WKNavigationDelegate {27    override func viewDidLoad() {28        super.viewDidLoad()29        webView = WKWebView()30        webView.navigationDelegate = CancellingWKWebViewNavigationDelegate(view: view)31    }32}33import XCTest34import WebKit35class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {36    init(view: UIView) {37    }38    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {39        view.testTraitsWithView()40    }41}42class ViewController: UIViewController, WKNavigationDelegate {43    override func viewDidLoad() {44        super.viewDidLoad()45        webView = WKWebView()

1let delegate = CancellingWKWebViewNavigationDelegate()2let cancellable = delegate.testTraitsWithView(view: view)3if cancellable {4    print("true")5} else {6    print("false")7}8let delegate = CancellingWKWebViewNavigationDelegate()9let cancellable = delegate.testTraitsWithView(view: view)10if cancellable {11    print("true")12} else {13    print("false")14}15let delegate = CancellingWKWebViewNavigationDelegate()16let cancellable = delegate.testTraitsWithView(view: view)17if cancellable {18    print("true")19} else {20    print("false")21}22let delegate = CancellingWKWebViewNavigationDelegate()23let cancellable = delegate.testTraitsWithView(view: view)24if cancellable {25    print("true")26} else {27    print("false")28}29let delegate = CancellingWKWebViewNavigationDelegate()30let cancellable = delegate.testTraitsWithView(view: view)31if cancellable {32    print("true")33} else {34    print("false")35}36let delegate = CancellingWKWebViewNavigationDelegate()