- (void)testThatItCanDownloadAndCancelAndDownloadAgain {
    AFImageDownloader *downloader = [[AFImageDownloader alloc] initWithSessionManager:self.downloader.sessionManager
                                                               downloadPrioritization:self.downloader.downloadPrioritizaton
                                                               maximumActiveDownloads:1
                                                                           imageCache:self.downloader.imageCache];

    XCTestExpectation *expectation = [self expectationWithDescription:@"no download should fail"];
    __block NSUInteger successCount = 0;

    NSArray *imageURLRequests = @[self.pngRequest, self.jpegRequest];

    for (NSURLRequest *imageURLRequest in imageURLRequests) {
        AFImageDownloadReceipt *receipt = [downloader downloadImageForURLRequest:imageURLRequest success:nil failure:nil];
        [downloader cancelTaskForImageDownloadReceipt:receipt];
    }

    for (NSURLRequest *imageURLRequest in imageURLRequests) {
        [downloader downloadImageForURLRequest:imageURLRequest success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
            successCount++;
            if (successCount == [imageURLRequests count]) {
                [expectation fulfill];
            }
        } failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
            [expectation fulfill];
        }];
    }

    [self waitForExpectationsWithCommonTimeoutUsingHandler:nil];

    XCTAssertTrue(successCount == [imageURLRequests count], @"all downloads should succeed");
}