Added SDWebImage Tests project. It uses CocoaPods (Expecta + XCTestAsync). Added some demo tests

-<?xml version="1.0" encoding="UTF-8"?>
-<Workspace
-   version = "1.0">
-   <FileRef
-      location = "group:SDWebImage.xcodeproj">
-   </FileRef>
-   <FileRef
-      location = "group:Examples/SDWebImage Demo.xcodeproj">
-   </FileRef>
-</Workspace>
+<?xml version='1.0' encoding='UTF-8'?><Workspace version='1.0'><FileRef location='group:SDWebImage.xcodeproj'/><FileRef location='group:Examples/SDWebImage Demo.xcodeproj'/><FileRef location='group:Tests/SDWebImage Tests.xcodeproj'/><FileRef location='group:Tests/Pods/Pods.xcodeproj'/></Workspace>

+xcodeproj 'SDWebImage Tests'
+workspace '../SDWebImage'
+
+def import_pods
+  pod 'Expecta'                       # A Matcher Framework for Objective-C/Cocoa
+  pod 'XCTestAsync'                   # Extension to XCTest for asynchronous testing
+  pod 'SDWebImage', :path => '../'
+end
+
+target :ios do
+  platform :ios, '5.0'
+  link_with 'Tests'
+  import_pods
+end

+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 46;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		ABC8501F672447AA91C788DA /* libPods-ios.a in Frameworks */ = {isa = PBXBuildFile; fileRef = EB0D107E6B4C4094BA2FEE29 /* libPods-ios.a */; };
+		DA248D57195472AA00390AB0 /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DA248D56195472AA00390AB0 /* XCTest.framework */; };
+		DA248D59195472AA00390AB0 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DA248D58195472AA00390AB0 /* Foundation.framework */; };
+		DA248D5B195472AA00390AB0 /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DA248D5A195472AA00390AB0 /* UIKit.framework */; };
+		DA248D61195472AA00390AB0 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = DA248D5F195472AA00390AB0 /* InfoPlist.strings */; };
+		DA248D69195475D800390AB0 /* SDImageCacheTests.m in Sources */ = {isa = PBXBuildFile; fileRef = DA248D68195475D800390AB0 /* SDImageCacheTests.m */; };
+		DA248D6B195476AC00390AB0 /* SDWebImageManagerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = DA248D6A195476AC00390AB0 /* SDWebImageManagerTests.m */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXFileReference section */
+		5421361315E74CAA8FCCC423 /* Pods-ios.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-ios.xcconfig"; path = "Pods/Pods-ios.xcconfig"; sourceTree = "<group>"; };
+		DA248D53195472AA00390AB0 /* Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = Tests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		DA248D56195472AA00390AB0 /* XCTest.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = XCTest.framework; path = Library/Frameworks/XCTest.framework; sourceTree = DEVELOPER_DIR; };
+		DA248D58195472AA00390AB0 /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = Library/Frameworks/Foundation.framework; sourceTree = DEVELOPER_DIR; };
+		DA248D5A195472AA00390AB0 /* UIKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = UIKit.framework; path = Library/Frameworks/UIKit.framework; sourceTree = DEVELOPER_DIR; };
+		DA248D5E195472AA00390AB0 /* Tests-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Tests-Info.plist"; sourceTree = "<group>"; };
+		DA248D60195472AA00390AB0 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/InfoPlist.strings; sourceTree = "<group>"; };
+		DA248D64195472AA00390AB0 /* Tests-Prefix.pch */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Tests-Prefix.pch"; sourceTree = "<group>"; };
+		DA248D68195475D800390AB0 /* SDImageCacheTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SDImageCacheTests.m; sourceTree = "<group>"; };
+		DA248D6A195476AC00390AB0 /* SDWebImageManagerTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SDWebImageManagerTests.m; sourceTree = "<group>"; };
+		EB0D107E6B4C4094BA2FEE29 /* libPods-ios.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-ios.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		DA248D50195472AA00390AB0 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				DA248D57195472AA00390AB0 /* XCTest.framework in Frameworks */,
+				DA248D5B195472AA00390AB0 /* UIKit.framework in Frameworks */,
+				DA248D59195472AA00390AB0 /* Foundation.framework in Frameworks */,
+				ABC8501F672447AA91C788DA /* libPods-ios.a in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		DA248D451954721A00390AB0 = {
+			isa = PBXGroup;
+			children = (
+				DA248D5C195472AA00390AB0 /* Tests */,
+				DA248D55195472AA00390AB0 /* Frameworks */,
+				DA248D54195472AA00390AB0 /* Products */,
+				5421361315E74CAA8FCCC423 /* Pods-ios.xcconfig */,
+			);
+			sourceTree = "<group>";
+		};
+		DA248D54195472AA00390AB0 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				DA248D53195472AA00390AB0 /* Tests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		DA248D55195472AA00390AB0 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				DA248D56195472AA00390AB0 /* XCTest.framework */,
+				DA248D58195472AA00390AB0 /* Foundation.framework */,
+				DA248D5A195472AA00390AB0 /* UIKit.framework */,
+				EB0D107E6B4C4094BA2FEE29 /* libPods-ios.a */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		DA248D5C195472AA00390AB0 /* Tests */ = {
+			isa = PBXGroup;
+			children = (
+				DA248D5D195472AA00390AB0 /* Supporting Files */,
+				DA248D68195475D800390AB0 /* SDImageCacheTests.m */,
+				DA248D6A195476AC00390AB0 /* SDWebImageManagerTests.m */,
+			);
+			path = Tests;
+			sourceTree = "<group>";
+		};
+		DA248D5D195472AA00390AB0 /* Supporting Files */ = {
+			isa = PBXGroup;
+			children = (
+				DA248D5E195472AA00390AB0 /* Tests-Info.plist */,
+				DA248D5F195472AA00390AB0 /* InfoPlist.strings */,
+				DA248D64195472AA00390AB0 /* Tests-Prefix.pch */,
+			);
+			name = "Supporting Files";
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		DA248D52195472AA00390AB0 /* Tests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = DA248D67195472AA00390AB0 /* Build configuration list for PBXNativeTarget "Tests" */;
+			buildPhases = (
+				FBC8982311CD4ED9A3006D45 /* Check Pods Manifest.lock */,
+				DA248D4F195472AA00390AB0 /* Sources */,
+				DA248D50195472AA00390AB0 /* Frameworks */,
+				DA248D51195472AA00390AB0 /* Resources */,
+				D6347736BDF64FC5A4D078A4 /* Copy Pods Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Tests;
+			productName = Tests;
+			productReference = DA248D53195472AA00390AB0 /* Tests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		DA248D461954721A00390AB0 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 0510;
+			};
+			buildConfigurationList = DA248D491954721A00390AB0 /* Build configuration list for PBXProject "SDWebImage Tests" */;
+			compatibilityVersion = "Xcode 3.2";
+			developmentRegion = English;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+			);
+			mainGroup = DA248D451954721A00390AB0;
+			productRefGroup = DA248D54195472AA00390AB0 /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				DA248D52195472AA00390AB0 /* Tests */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		DA248D51195472AA00390AB0 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				DA248D61195472AA00390AB0 /* InfoPlist.strings in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		D6347736BDF64FC5A4D078A4 /* Copy Pods Resources */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Copy Pods Resources";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Pods-ios-resources.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		FBC8982311CD4ED9A3006D45 /* Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Check Pods Manifest.lock";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
+			showEnvVarsInLog = 0;
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		DA248D4F195472AA00390AB0 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				DA248D69195475D800390AB0 /* SDImageCacheTests.m in Sources */,
+				DA248D6B195476AC00390AB0 /* SDWebImageManagerTests.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXVariantGroup section */
+		DA248D5F195472AA00390AB0 /* InfoPlist.strings */ = {
+			isa = PBXVariantGroup;
+			children = (
+				DA248D60195472AA00390AB0 /* en */,
+			);
+			name = InfoPlist.strings;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
+/* Begin XCBuildConfiguration section */
+		DA248D4A1954721A00390AB0 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+			};
+			name = Debug;
+		};
+		DA248D4B1954721A00390AB0 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+			};
+			name = Release;
+		};
+		DA248D65195472AA00390AB0 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 5421361315E74CAA8FCCC423 /* Pods-ios.xcconfig */;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(SDKROOT)/Developer/Library/Frameworks",
+					"$(inherited)",
+					"$(DEVELOPER_FRAMEWORKS_DIR)",
+				);
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "Tests/Tests-Prefix.pch";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				INFOPLIST_FILE = "Tests/Tests-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
+				ONLY_ACTIVE_ARCH = YES;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = iphoneos;
+				WRAPPER_EXTENSION = xctest;
+			};
+			name = Debug;
+		};
+		DA248D66195472AA00390AB0 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 5421361315E74CAA8FCCC423 /* Pods-ios.xcconfig */;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = YES;
+				ENABLE_NS_ASSERTIONS = NO;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(SDKROOT)/Developer/Library/Frameworks",
+					"$(inherited)",
+					"$(DEVELOPER_FRAMEWORKS_DIR)",
+				);
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_PRECOMPILE_PREFIX_HEADER = YES;
+				GCC_PREFIX_HEADER = "Tests/Tests-Prefix.pch";
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				INFOPLIST_FILE = "Tests/Tests-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SDKROOT = iphoneos;
+				VALIDATE_PRODUCT = YES;
+				WRAPPER_EXTENSION = xctest;
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		DA248D491954721A00390AB0 /* Build configuration list for PBXProject "SDWebImage Tests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				DA248D4A1954721A00390AB0 /* Debug */,
+				DA248D4B1954721A00390AB0 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		DA248D67195472AA00390AB0 /* Build configuration list for PBXNativeTarget "Tests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				DA248D65195472AA00390AB0 /* Debug */,
+				DA248D66195472AA00390AB0 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = DA248D461954721A00390AB0 /* Project object */;
+}

+//
+//  SDImageCacheTests.m
+//  SDWebImage Tests
+//
+//  Created by Bogdan Poplauschi on 20/06/14.
+//
+//
+
+#define EXP_SHORTHAND   // required by Expecta
+
+
+#import <XCTest/XCTest.h>
+#import <XCTestAsync/XCTestAsync.h>
+#import <Expecta.h>
+
+#import "SDImageCache.h"
+
+
+@interface SDImageCacheTests : XCTestCase
+
+@end
+
+@implementation SDImageCacheTests
+
+- (void)setUp
+{
+    [super setUp];
+    // Put setup code here. This method is called before the invocation of each test method in the class.
+}
+
+- (void)tearDown
+{
+    // Put teardown code here. This method is called after the invocation of each test method in the class.
+    [super tearDown];
+}
+
+- (void)testSharedImageCache {
+    SDImageCache *sharedImageCache = [SDImageCache sharedImageCache];
+    
+    expect(sharedImageCache).toNot.beNil();
+}
+
+@end

+//
+//  SDWebImageManagerTests.m
+//  SDWebImage Tests
+//
+//  Created by Bogdan Poplauschi on 20/06/14.
+//
+//
+
+#define EXP_SHORTHAND   // required by Expecta
+
+
+#import <XCTest/XCTest.h>
+#import <XCTestAsync/XCTestAsync.h>
+#import <Expecta.h>
+
+#import "SDWebImageManager.h"
+
+static int64_t kAsyncTestTimeout = 5;
+
+
+@interface SDWebImageManagerTests : XCTestCase
+
+@end
+
+@implementation SDWebImageManagerTests
+
+- (void)setUp
+{
+    [super setUp];
+    // Put setup code here. This method is called before the invocation of each test method in the class.
+}
+
+- (void)tearDown
+{
+    // Put teardown code here. This method is called after the invocation of each test method in the class.
+    [super tearDown];
+}
+
+- (void)testThatDownloadInvokesCompletionBlockWithCorrectParamsAsync {
+    NSURL *originalImageURL = [NSURL URLWithString:@"http://static2.dmcdn.net/static/video/656/177/44771656:jpeg_preview_small.jpg?20120509154705"];
+    
+    [[SDWebImageManager sharedManager] downloadImageWithURL:originalImageURL options:SDWebImageRefreshCached progress:^(NSInteger receivedSize, NSInteger expectedSize) {
+//        expect(receivedSize).to.beLessThanOrEqualTo(expectedSize);
+    } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
+        expect(image).toNot.beNil();
+        expect(error).to.beNil();
+        expect(originalImageURL).to.equal(imageURL);
+        
+        NSLog(@"xxxx");
+        
+        XCAsyncSuccess();
+    }];
+    
+    XCAsyncFailAfter(kAsyncTestTimeout, @"Download image timed out");
+}
+
+@end

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.SDWebImage.${PRODUCT_NAME:rfc1034identifier}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

+//
+//  Prefix header
+//
+//  The contents of this file are implicitly included at the beginning of every source file.
+//
+
+#ifdef __OBJC__
+    #import <UIKit/UIKit.h>
+    #import <Foundation/Foundation.h>
+#endif

+/* Localized versions of Info.plist keys */
+