Upgrade project settings to Swift 4.2

Demo/Demo/Kingfisher-Demo/AppDelegate.swift

@@ -32,8 +32,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
-    func applicationDidFinishLaunching(_ application: UIApplication) {
-        // Override point for customization after application launch.
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
+        return true
     }
     
 }

Demo/Demo/Kingfisher-macOS-Demo/AppDelegate.swift

@@ -30,8 +30,6 @@ import Kingfisher
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
 
-
-
     func applicationDidFinishLaunching(aNotification: NSNotification) {
         // Insert code here to initialize your application
     }

Demo/Demo/Kingfisher-tvOS-Demo/AppDelegate.swift

@@ -33,7 +33,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     var window: UIWindow?
 
 
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
         // Override point for customization after application launch.
         return true
     }

Demo/Kingfisher-Demo.xcodeproj/project.pbxproj

@@ -631,7 +631,7 @@
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SDKROOT = macosx;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -655,7 +655,7 @@
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -677,7 +677,7 @@
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SDKROOT = appletvos;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
@@ -702,7 +702,7 @@
 				SDKROOT = appletvos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
@@ -724,7 +724,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -746,7 +746,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -772,7 +772,7 @@
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = On;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -798,7 +798,7 @@
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = On;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -923,7 +923,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "com.onevcat.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -940,7 +940,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};

Kingfisher.xcodeproj/project.pbxproj

@@ -1201,7 +1201,7 @@
 				TargetAttributes = {
 					4B2944471C3D01B20088C3E7 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = "";
 					};
 					4B37667E1C478F940001443F = {
 						CreatedOnToolsVersion = 7.2;
@@ -1209,7 +1209,7 @@
 					};
 					D10EC2301C3D632300A4211C = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1000;
 					};
 					D13F49D51BEDA67C00CE335D = {
 						CreatedOnToolsVersion = 7.1;
@@ -1221,11 +1221,11 @@
 					};
 					D1ED2D341AD2D09F00CFC3EB = {
 						CreatedOnToolsVersion = 6.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1000;
 					};
 					D1ED2D3E1AD2D09F00CFC3EB = {
 						CreatedOnToolsVersion = 6.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1000;
 					};
 				};
 			};
@@ -1994,7 +1994,7 @@
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2025,7 +2025,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2046,7 +2046,7 @@
 				SDKROOT = appletvos;
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Debug;
@@ -2067,7 +2067,7 @@
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Release;
@@ -2088,8 +2088,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -2110,8 +2109,7 @@
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -2141,7 +2139,7 @@
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -2174,7 +2172,7 @@
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -2205,7 +2203,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -2236,7 +2234,7 @@
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = 4;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -2373,8 +2371,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2402,8 +2399,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_INCLUDE_PATHS = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2426,8 +2422,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -2444,8 +2439,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Tests/KingfisherTests/KingfisherTests-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};

Sources/AnimatedImageView.swift

@@ -108,7 +108,7 @@ open class AnimatedImageView: UIImageView {
     public var needsPrescaling = true
     
     /// The animation timer's run loop mode. Default is `NSRunLoopCommonModes`. Set this property to `NSDefaultRunLoopMode` will make the animation pause during UIScrollView scrolling.
-    public var runLoopMode = RunLoopMode.commonModes {
+    public var runLoopMode = RunLoop.Mode.common {
         willSet {
             if runLoopMode == newValue {
                 return
@@ -333,7 +333,7 @@ class Animator {
         }
     }
     
-    var contentMode = UIViewContentMode.scaleToFill
+    var contentMode = UIView.ContentMode.scaleToFill
     
     private lazy var preloadQueue: DispatchQueue = {
         return DispatchQueue(label: "com.onevcat.Kingfisher.Animator.preloadQueue")
@@ -350,7 +350,7 @@ class Animator {
      - returns: The animator object.
      */
     init(imageSource source: CGImageSource,
-         contentMode mode: UIViewContentMode,
+         contentMode mode: UIView.ContentMode,
          size: CGSize,
          framePreloadCount count: Int,
          repeatCount: AnimatedImageView.RepeatCount) {

Sources/Image.swift

@@ -181,7 +181,7 @@ extension Kingfisher where Base: Image {
             let rep = NSBitmapImageRep(cgImage: cgimage)
             return rep.representation(using: .png, properties: [:])
         #else
-            return UIImagePNGRepresentation(base)
+            return base.pngData()
         #endif
     }
     
@@ -194,7 +194,7 @@ extension Kingfisher where Base: Image {
             let rep = NSBitmapImageRep(cgImage: cgImage)
             return rep.representation(using:.jpeg, properties: [.compressionFactor: compressionQuality])
         #else
-            return UIImageJPEGRepresentation(base, compressionQuality)
+            return base.jpegData(compressionQuality: compressionQuality)
         #endif
     }
     
@@ -431,7 +431,7 @@ extension Kingfisher where Base: Image {
                 }
 
                 let path = NSBezierPath(roundedRect: rect, byRoundingCorners: corners, radius: radius)
-                path.windingRule = .evenOddWindingRule
+                path.windingRule = .evenOdd
                 path.addClip()
                 base.draw(in: rect)
             #else
@@ -457,7 +457,7 @@ extension Kingfisher where Base: Image {
     }
     
     #if os(iOS) || os(tvOS)
-    func resize(to size: CGSize, for contentMode: UIViewContentMode) -> Image {
+    func resize(to size: CGSize, for contentMode: UIView.ContentMode) -> Image {
         switch contentMode {
         case .scaleAspectFit:
             return resize(to: size, for: .aspectFit)

Sources/ImageCache.swift

@@ -156,11 +156,11 @@ open class ImageCache {
         
 #if !os(macOS) && !os(watchOS)
         NotificationCenter.default.addObserver(
-            self, selector: #selector(clearMemoryCache), name: .UIApplicationDidReceiveMemoryWarning, object: nil)
+            self, selector: #selector(clearMemoryCache), name: UIApplication.didReceiveMemoryWarningNotification, object: nil)
         NotificationCenter.default.addObserver(
-            self, selector: #selector(cleanExpiredDiskCache), name: .UIApplicationWillTerminate, object: nil)
+            self, selector: #selector(cleanExpiredDiskCache), name: UIApplication.willTerminateNotification, object: nil)
         NotificationCenter.default.addObserver(
-            self, selector: #selector(backgroundCleanExpiredDiskCache), name: .UIApplicationDidEnterBackground, object: nil)
+            self, selector: #selector(backgroundCleanExpiredDiskCache), name: UIApplication.didEnterBackgroundNotification, object: nil)
 #endif
     }
     
@@ -540,7 +540,7 @@ open class ImageCache {
 
         func endBackgroundTask(_ task: inout UIBackgroundTaskIdentifier) {
             sharedApplication.endBackgroundTask(task)
-            task = UIBackgroundTaskInvalid
+            task = UIBackgroundTaskIdentifier.invalid
         }
         
         var backgroundTask: UIBackgroundTaskIdentifier!

Sources/ImageModifier.swift

@@ -116,13 +116,13 @@ import UIKit
 public struct RenderingModeImageModifier: ImageModifier {
 
     /// The rendering mode to apply to the image.
-    public let renderingMode: UIImageRenderingMode
+    public let renderingMode: UIImage.RenderingMode
 
     /// Initialize a `RenderingModeImageModifier`
     ///
     /// - parameter renderingMode: The rendering mode to apply to the image.
     ///                            Default is .automatic
-    public init(renderingMode: UIImageRenderingMode = .automatic) {
+    public init(renderingMode: UIImage.RenderingMode = .automatic) {
         self.renderingMode = renderingMode
     }
 

Sources/ImageTransition.swift

@@ -79,7 +79,7 @@ public enum ImageTransition {
     
     /// Custom transition.
     case custom(duration: TimeInterval,
-                 options: UIViewAnimationOptions,
+                 options: UIView.AnimationOptions,
               animations: ((UIImageView, UIImage) -> Void)?,
               completion: ((Bool) -> Void)?)
     
@@ -97,7 +97,7 @@ public enum ImageTransition {
         }
     }
     
-    var animationOptions: UIViewAnimationOptions {
+    var animationOptions: UIView.AnimationOptions {
         switch self {
         case .none:                         return []
         case .fade(_):                      return .transitionCrossDissolve

Sources/Indicator.swift

@@ -131,11 +131,11 @@ final class ActivityIndicator: Indicator {
             activityIndicatorView.style = .spinning
         #else
             #if os(tvOS)
-                let indicatorStyle = UIActivityIndicatorViewStyle.white
+                let indicatorStyle = UIActivityIndicatorView.Style.white
             #else
-                let indicatorStyle = UIActivityIndicatorViewStyle.gray
+                let indicatorStyle = UIActivityIndicatorView.Style.gray
             #endif
-            activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle:indicatorStyle)
+            activityIndicatorView = UIActivityIndicatorView(style:indicatorStyle)
             activityIndicatorView.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleBottomMargin, .flexibleTopMargin]
         #endif
     }

Sources/UIButton+Kingfisher.swift

@@ -52,7 +52,7 @@ extension Kingfisher where Base: UIButton {
      */
     @discardableResult
     public func setImage(with resource: Resource?,
-                         for state: UIControlState,
+                         for state: UIControl.State,
                          placeholder: UIImage? = nil,
                          options: KingfisherOptionsInfo? = nil,
                          progressBlock: DownloadProgressBlock? = nil,
@@ -130,7 +130,7 @@ extension Kingfisher where Base: UIButton {
      */
     @discardableResult
     public func setBackgroundImage(with resource: Resource?,
-                                   for state: UIControlState,
+                                   for state: UIControl.State,
                                    placeholder: UIImage? = nil,
                                    options: KingfisherOptionsInfo? = nil,
                                    progressBlock: DownloadProgressBlock? = nil,
@@ -200,11 +200,11 @@ extension Kingfisher where Base: UIButton {
      
      - returns: Current URL for image.
      */
-    public func webURL(for state: UIControlState) -> URL? {
+    public func webURL(for state: UIControl.State) -> URL? {
         return webURLs[NSNumber(value:state.rawValue)] as? URL
     }
     
-    fileprivate func setWebURL(_ url: URL?, for state: UIControlState) {
+    fileprivate func setWebURL(_ url: URL?, for state: UIControl.State) {
         webURLs[NSNumber(value:state.rawValue)] = url
     }
     
@@ -243,11 +243,11 @@ extension Kingfisher where Base: UIButton {
      
      - returns: Current URL for background image.
      */
-    public func backgroundWebURL(for state: UIControlState) -> URL? {
+    public func backgroundWebURL(for state: UIControl.State) -> URL? {
         return backgroundWebURLs[NSNumber(value:state.rawValue)] as? URL
     }
     
-    fileprivate func setBackgroundWebURL(_ url: URL?, for state: UIControlState) {
+    fileprivate func setBackgroundWebURL(_ url: URL?, for state: UIControl.State) {
         backgroundWebURLs[NSNumber(value:state.rawValue)] = url
     }
     

Tests/KingfisherTests/UIButtonExtensionTests.swift

@@ -79,7 +79,7 @@ class UIButtonExtensionTests: XCTestCase {
             XCTAssert(progressBlockIsCalled, "progressBlock should be called at least once.")
             XCTAssert(image != nil, "Downloaded image should exist.")
             XCTAssert(image! == testImage, "Downloaded image should be the same as test image.")
-            XCTAssert(self.button.image(for: UIControlState.highlighted)! == testImage, "Downloaded image should be already set to the image for state")
+            XCTAssert(self.button.image(for: UIControl.State.highlighted)! == testImage, "Downloaded image should be already set to the image for state")
             XCTAssert(self.button.kf.webURL(for: .highlighted) == imageURL, "Web URL should equal to the downloaded url.")
             XCTAssert(cacheType == .none, "The cache type should be none here. This image was just downloaded. But now is: \(cacheType)")
         }
@@ -117,7 +117,7 @@ class UIButtonExtensionTests: XCTestCase {
         let stub = stubRequest("GET", URLString).andReturn(200)?.withBody(testImageData)?.delay()
         let url = URL(string: URLString)!
 
-        button.kf.setImage(with: url, for: UIControlState.highlighted, placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
+        button.kf.setImage(with: url, for: UIControl.State.highlighted, placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
                 
             }) { (image, error, cacheType, imageURL) -> Void in
                 XCTAssertNotNil(error)
@@ -140,7 +140,7 @@ class UIButtonExtensionTests: XCTestCase {
         let stub = stubRequest("GET", URLString).andReturn(200)?.withBody(testImageData)?.delay()
         let url = URL(string: URLString)!
         
-        button.kf.setBackgroundImage(with: url, for: UIControlState(), placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
+        button.kf.setBackgroundImage(with: url, for: UIControl.State(), placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
             XCTFail("Progress block should not be called.")
             }) { (image, error, cacheType, imageURL) -> Void in
                 XCTAssertNotNil(error)
@@ -160,7 +160,7 @@ class UIButtonExtensionTests: XCTestCase {
         let expectation = self.expectation(description: "wait for downloading image")
         
         let url: URL? = nil
-        button.kf.setBackgroundImage(with: url, for: UIControlState(), placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
+        button.kf.setBackgroundImage(with: url, for: UIControl.State(), placeholder: nil, options: nil, progressBlock: { (receivedSize, totalSize) -> Void in
             XCTFail("Progress block should not be called.")
         }) { (image, error, cacheType, imageURL) -> Void in
             XCTAssertNil(image)