Add the test for transformer property

SDWebImage/UIImage+Transform.h

@@ -41,7 +41,7 @@ typedef NS_OPTIONS(NSUInteger, SDRectCorner) {
 @interface NSBezierPath (Additions)
 
 /**
- Convenience way to create a bezier path with the specify rouunding corners on macOS. Same as the one on `UIBezierPath`.
+ Convenience way to create a bezier path with the specify rounding corners on macOS. Same as the one on `UIBezierPath`.
  */
 + (nonnull instancetype)sd_bezierPathWithRoundedRect:(NSRect)rect byRoundingCorners:(SDRectCorner)corners cornerRadius:(CGFloat)cornerRadius;
 

Tests/SDWebImage Tests.xcodeproj/project.pbxproj

@@ -12,6 +12,8 @@
 		2D7AF0601F329763000083C2 /* SDTestCase.m in Sources */ = {isa = PBXBuildFile; fileRef = 2D7AF05F1F329763000083C2 /* SDTestCase.m */; };
 		321259EC1F39E3240096FE0E /* TestImageStatic.webp in Resources */ = {isa = PBXBuildFile; fileRef = 321259EB1F39E3240096FE0E /* TestImageStatic.webp */; };
 		321259EE1F39E4110096FE0E /* TestImageAnimated.webp in Resources */ = {isa = PBXBuildFile; fileRef = 321259ED1F39E4110096FE0E /* TestImageAnimated.webp */; };
+		3264FF2F205D42CB00F6BD48 /* SDWebImageTestTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 3264FF2E205D42CB00F6BD48 /* SDWebImageTestTransformer.m */; };
+		3264FF30205D42CB00F6BD48 /* SDWebImageTestTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 3264FF2E205D42CB00F6BD48 /* SDWebImageTestTransformer.m */; };
 		32B99E8B203AF8690017FD66 /* SDCategoriesTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 32B99E8A203AF8690017FD66 /* SDCategoriesTests.m */; };
 		32B99E9B203B2EDD0017FD66 /* SDTestCase.m in Sources */ = {isa = PBXBuildFile; fileRef = 2D7AF05F1F329763000083C2 /* SDTestCase.m */; };
 		32B99E9C203B2EE40017FD66 /* SDCategoriesTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 32B99E8A203AF8690017FD66 /* SDCategoriesTests.m */; };
@@ -56,6 +58,8 @@
 		2D7AF05F1F329763000083C2 /* SDTestCase.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SDTestCase.m; sourceTree = "<group>"; };
 		321259EB1F39E3240096FE0E /* TestImageStatic.webp */ = {isa = PBXFileReference; lastKnownFileType = file; path = TestImageStatic.webp; sourceTree = "<group>"; };
 		321259ED1F39E4110096FE0E /* TestImageAnimated.webp */ = {isa = PBXFileReference; lastKnownFileType = file; path = TestImageAnimated.webp; sourceTree = "<group>"; };
+		3264FF2D205D42CB00F6BD48 /* SDWebImageTestTransformer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = SDWebImageTestTransformer.h; sourceTree = "<group>"; };
+		3264FF2E205D42CB00F6BD48 /* SDWebImageTestTransformer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = SDWebImageTestTransformer.m; sourceTree = "<group>"; };
 		32B99E8A203AF8690017FD66 /* SDCategoriesTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = SDCategoriesTests.m; sourceTree = "<group>"; };
 		32B99E92203B2DF90017FD66 /* Tests Mac.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Tests Mac.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		32B99E96203B2DF90017FD66 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -193,6 +197,8 @@
 				2D7AF05F1F329763000083C2 /* SDTestCase.m */,
 				32E6F0301F3A1B4700A945E6 /* SDWebImageTestDecoder.h */,
 				32E6F0311F3A1B4700A945E6 /* SDWebImageTestDecoder.m */,
+				3264FF2D205D42CB00F6BD48 /* SDWebImageTestTransformer.h */,
+				3264FF2E205D42CB00F6BD48 /* SDWebImageTestTransformer.m */,
 			);
 			path = Tests;
 			sourceTree = "<group>";
@@ -447,6 +453,7 @@
 				32B99E9E203B2F810017FD66 /* SDMockFileManager.m in Sources */,
 				32B99EAB203B36620017FD66 /* SDWebImageManagerTests.m in Sources */,
 				32B99EA9203B34B60017FD66 /* SDWebImageDecoderTests.m in Sources */,
+				3264FF30205D42CB00F6BD48 /* SDWebImageTestTransformer.m in Sources */,
 				32B99E9B203B2EDD0017FD66 /* SDTestCase.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -464,6 +471,7 @@
 				DA248D69195475D800390AB0 /* SDImageCacheTests.m in Sources */,
 				DA248D6B195476AC00390AB0 /* SDWebImageManagerTests.m in Sources */,
 				32B99E8B203AF8690017FD66 /* SDCategoriesTests.m in Sources */,
+				3264FF2F205D42CB00F6BD48 /* SDWebImageTestTransformer.m in Sources */,
 				433BBBB51D7EF5C00086B6E9 /* SDWebImageDecoderTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

Tests/Tests/SDWebImageManagerTests.m

@@ -8,6 +8,7 @@
 
 #import "SDTestCase.h"
 #import <SDWebImage/SDWebImageManager.h>
+#import "SDWebImageTestTransformer.h"
 
 @interface SDWebImageManagerTests : SDTestCase
 
@@ -135,4 +136,23 @@
     [self waitForExpectationsWithTimeout:kAsyncTestTimeout * 2 handler:nil];
 }
 
+- (void)test08ThatImageTransformerWork {
+    XCTestExpectation *expectation = [self expectationWithDescription:@"Image transformer work"];
+    NSURL *imageURL = [NSURL URLWithString:kTestJpegURL];
+    SDWebImageTestTransformer *transformer = [[SDWebImageTestTransformer alloc] init];
+    NSBundle *testBundle = [NSBundle bundleForClass:[self class]];
+    NSString *testImagePath = [testBundle pathForResource:@"TestImage" ofType:@"jpg"];
+    transformer.testImage = [[UIImage alloc] initWithContentsOfFile:testImagePath];
+    SDWebImageManager *manager = [[SDWebImageManager alloc] initWithCache:[SDImageCache sharedImageCache] downloader:[SDWebImageDownloader sharedDownloader]];
+    manager.transformer = transformer;
+    [[SDImageCache sharedImageCache] removeImageForKey:kTestJpegURL withCompletion:^{
+        [manager loadImageWithURL:imageURL options:SDWebImageTransformAnimatedImage progress:nil completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
+            expect(image).equal(transformer.testImage);
+            [expectation fulfill];
+        }];
+    }];
+    
+    [self waitForExpectationsWithCommonTimeout];
+}
+
 @end

Tests/Tests/SDWebImageTestTransformer.h

@@ -0,0 +1,16 @@
+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ * (c) Matt Galloway
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import <SDWebImage/SDWebImageTransformer.h>
+
+@interface SDWebImageTestTransformer : NSObject <SDWebImageTransformer>
+
+@property (nonatomic, strong, nullable) UIImage *testImage;
+
+@end

Tests/Tests/SDWebImageTestTransformer.m

@@ -0,0 +1,22 @@
+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ * (c) Matt Galloway
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import "SDWebImageTestTransformer.h"
+
+@implementation SDWebImageTestTransformer
+
+- (NSString *)transformerKey {
+    return @"SDWebImageTestTransformer";
+}
+
+- (UIImage *)transformedImageWithImage:(UIImage *)image forKey:(NSString *)key {
+    return self.testImage;
+}
+
+@end