Added error test

@@ -39,14 +39,24 @@ static int64_t kAsyncTestTimeout = 5;
 - (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) {
+    [[SDWebImageManager sharedManager] downloadImageWithURL:originalImageURL options:SDWebImageRefreshCached progress:nil 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");
+}
+
+- (void)testThatDownloadWithIncorrectURLInvokesCompletionBlockWithAnErrorAsync {
+    NSURL *originalImageURL = [NSURL URLWithString:@"http://static2.dmcdn.net/static/video/656/177/44771656:jpeg_preview_small.png"];
+    
+    [[SDWebImageManager sharedManager] downloadImageWithURL:originalImageURL options:SDWebImageRefreshCached progress:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
+        expect(image).to.beNil();
+        expect(error).toNot.beNil();
+        expect(originalImageURL).to.equal(imageURL);
         
         XCAsyncSuccess();
     }];